NFPA 54 -- A99 ROP · NFPA 54 -- A99 ROP Report of the ... CA [El Patricio J. Himes, ... buLI find...

N F P A 5 4 - - A 9 9 R O P

Report of the Committee on

National Fuel Gas Code

Mike Gorham, Chair Northwest LP Gas Co., MN [IM]

Rep. Nat'l Propane Gas Assn.

Joe A. Akin, Alabama Gas Corp., AL [E] Rep. Southern Bldg. Code Congress Int'l Inc.

J ohn O. Bigelow, lII, Bigelow Assoc., NJ [SE] ames P. Brewer, Magic Sweep Corp., VA [IM] Rep. Nat'l Chimney Sweep Guild

Thomas E. Buchal, Intertek Testing Services, M N [RT] Thaddeus Bukowski, Underwriters Laboratories Inc., IL [RT] Ross K. Burnside, UTC Carrier Corp., IN [M]

Rep. Gas Appliance Mfrs. Assn. Inc. Allen J. Callahan, Int'l Approval Services, OH [SE] Thomas R. Crane, Crane Engr and Forensic Services, MN [SE] John P. Doucette, State of Connecticut, CT [E] Wilbur L. Haag, Jr., A. O. Smith Water Products Co., SC [M]

Rep. Gas Appliance Mfrs. Assn. Inc, Steen Hagensen, Exbausto, Inc., GA [M] John M. Halliwill, lnt ' l Assn. of Plumbing & Mechanical Officials, CA [El Patricio J. Himes, Sistemas de Energia, Mexico [U]

Rep. Asociaci6n Mexicana de Distribuidores de Gas, Daryl L. Hosler, Southern California Gas Co., CA JIM]

Rep. American Gas Assn., Br iauC. OIson, Nat'l Park Service, CO [U] Leonard Pakruda, Alabama Liquefied Petroleum Gas Board, AL [E]

Rep. Fire Marshals Assn. of North America Thomas D. Petru, LP-Gas Section, Gas Services Division, TX [E] Robert E, Rhead, Lumbermens Mutual Casualty (Kemper), IL [I] David W. Rock, City of Portland, OR [El Issac P. Sargunam, Maytag Cleveland Cooking Products, TN [M]

Rep. Assn. of Home Appliance Mfrs., Gary K. Strebe, Int'l Comfort Products Corp., TN [M]

Rep. Gas Appliance Mfrs. Assn. Inc. Larry L. Westling, Northwest Natural Gas Co., OR [IM]

Rep. American Gas Assn., Richard E. White, South Bend, IN [U]

Rep. Nat'l Assn. of Plumbing Heating Cooling Contractors

Alternates

Paul E. Beach, Emerson Electric Co., OH [M] (Alt to W. L. Haag)

Glen Edgar, Seikirk Metalbestos, OH [M] (Alt_ to R. K. Burnside)

Blaine R. Lannlng, Int ' l Approval Services, Inc., OH [SE] (Alt to A.J. Callahan)

Christopher M. Moore, Kemper Insurance Cos., MA [I] (Alt. to R. E. Rhead)

Michael Snyder, ServiceAir, MD [U] (A_lt. to R. E. White)

Bruce J. Swiecicki, Nat'l Propane Gas Assn., IL [IM] (Alt. to M. Gorham)

Staff Liaison: Theodore C. Lemoff

Committee Scope: This Committee shall have primary responsibility for a documents on safety code for gas piping systems on .consumers' premises and the installation of gas utilization equipment and accessories for use with fuel gases such as natural gas, manufactured gas, liquefied petroleum gas in the vapor phase, liquefied petroleum ~as-alr mixtures, or mixtures of these gases, including: a. The design, fabrication, installation, testing, operation and maintenance of gas piping systems from the point of delivery to the connections with each gas utilization device. Piping systems covered by this Code are limited to a maximum operating pressure of 125 psig. For purposes of this Code, the point of delivery is defined as the outlet of the meter set assembly, or the outlet of the service regulator O r service shutoff valve.where no meter is provided, b. The installation of utilization equipment, related accessories, and their vennlation and venting systems.

This list represents the membership at the time the Committee was balloted on the text of this edition. Since that time, changes in the membership may have occurred. A key to classifications is found at the front of this book.

The Report of the Technical Committee on the National Fuel Gas Code is presented for adoption.

This Report was prepared by the Technical Committee on the National Fuel Gas Code and proposes for adoption amendments to NFPA 54-1996, National Fuel Gas Code. NFPA 54-1996 is published in Volume 2 of the 1998 National Fire Codes and in separate pamphlet form.

This Report has been submitted to letter ballot of the Technical Committee on the National Fuel Gas Code, which consists 6f 24 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report.

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NOTE: To assist in review and comment a draft of NFPA 54 is available and downloadable from our Web Site. It is also available on the CD ROM. Paper copies of the draft are available from NFPA upon request by calling Customer Service . (a) 1-800-344-3555

(Log #N19) 54/Z223.1- 1 - (1.1.1(a) ) : Accept SUBMITTER: Melvin W. Scbroeder, M. W. Schroeder Corp.

I RECOMMENDATION: Revise text as follows: 1.1.1(a) This Code is a safety code that shall apply to the

installation, repair, and maintenance of fuel gas piping systems, fuel gas utilization equipment, and related accessories as follows:

(No change to the rest of this section.) SUBSTANTIATION: To clarify that this Code is also applicable to persons performing repairs and maintenance to fuel gas piping systems, fuel gas utilization equipment, and related accessories as covered by dfis Code. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead,White

(Log #N28) 54/Z223.1- 2 - (1.6 (New)): Reject SUBMITTER: James H. Shanley, Jr. , John A. Kennedy & Assoc. RECOMMENDATION: Add new paragraph 1.6 as follows and r enumber subsequent sections:

1.6 Prevention of Accidental Introduction of Gas. "If fuel gas is made available to a gas system prior to the

inspection, testing, and purging procedures required by Part 4 of this (2ode, an acceptable method for preventing the accidental or inadvertent introduction of gas into the system shall be provided by the agency providing the fuel gas. Gas is available if a supply of gas can be established to the gas system by the opening of a valve or valves or the filling of a storage tank which is connected to the gas system. Acceptable methods for preventing accidental introduction of filel gas into a g,x~ system include locking the gas supply valve(s) in the closed position or providing a lock on a cover such that the valve cannot be opened. The lock shall include a red tag to identify the agency and person placing it, the date and the reason for the lock-out, along with the wording "DANGER: Do Not Remove Lock Or Open Gas Valve. Contact The Gas Supplier."

In addition to the application of the lock-out and tag, the imrson(s) in legal control of the structure serviced by the gas systeu~ shall be advised of the reason for the lock-out and the need to inspect, test, and purge the system prior to resumption of service.

The lock-out may only be removed its part of the estal)lishment of gas service which would include the requirements of Part 4 of this Code. The lock-out shall be removed by the placing agency. The lock-out may be removed by a person or agency other than the one which placed it, but only after the removing person or agency has communicated their intent with the placing agency, and after receiving permission to remove the lock-out from the placing agency." SUBSTANTIATION: I have investigated several explosions and fires, most of which caused deaths or serious injury, where the fuel gas was introduced into the gas system before or without any inspection, testing, or purging of the system. This was because the person (typically a homeowner or other occupant of the building) turning on the gas was unaware of the requirements and the danger in doing so. The fuel gas was made available when the LP tanks were filled but the supply valves were left closed or g.as supply valves were without locks. It was too easy for a person to just go out to the tank or the meter and open the valve.

These tag-out procedures are a conunon safety procedure, and are similar to die OSHA rules.

This proposal, in addition to the one I have submitted for Section 4.2.1, would prevent the introduction of fuel gas into a gas syst.eln which has not beetJ iiispected or teste d by an unsuspecting or ignorant person. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Section 4.2.1 and 4.2.2 cover this. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETIIRNED: 3 Bigelow, Rhead, White

fLog #N4) 54/Z223.1- 3 - (1.7 All Definitions): Accept Note: This Proposal appeared as 54-3 which was held f rom the

Annual 96 ROC on Proposal 54-18. SUBMITTER: James 1L Biven, Comstock-Castle Stove Co. RECOMMENDATION: Put ALL definitions in section 1.7. Leave no definitions in other sections of the Code (e.g., "Section 11.1, Definitions..." Page 169 of the current code. S U B S T A N T I A T I O N : All definitions should be found only in 1.7 The intent of the committee seems to remove redundant entries, b u L I find "accepted" recommendat ions to duplicate definitions in 1.7 while making no mention of removing these same term definitions from their present location. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VO TE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, White

(Log #A16/N30) 54/Z223.1- 4 - (1.7 Boiler, Low Pressure): Reject SUBMITTER: Wilbur L. HaagJr. , A. O. Smith Water Products Company RECOMMENDATION: Revise text as follows:

Boiler, Low Pressure. A boiler that supplies steam at a pressure not exceeding 15 psi (100 KPa), or hot water at a pressure not exceeding 160 psi (1100 KPa) at a temperature, not exceeding 250°F (121°C).

(a) Boiler, Hot Water Heating Boiler. A boiler designed to heat water for circulation through an external space heating system.

(b) Boiler, Hot Water Supply. A boiler used to heat water for purposes other than space heating.

(c) Boiler, Steam Heating. A boiler designed to convert water into steam which is supplied to an external space heating system. S U B S T A N T I A T I O N : The present definition would also apply to a high pressure boiler. (a), (b), & (c) have been reworded to be in agreement with the construction code for these boilers, ASME BPVC Section IV. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e proposal was rejected because the existing definition is consistent with the current ANSI Z-21 series product standards. The Panel recommends that this proposal be referred to the Z-21/83 Committee. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 20 NEGATIVE: 1 NOT RETURNED: 3 Bigelow, Rhead, White

EXPLANATION OF NEGATIVE: HAAG: The panel rationale implies that the existing boiler

definition is consistent with Z21.13. This is true, however, at the July 1997Joint Subcommittee meeting, the revised definitions, as presented here, were adopted. These definitions are also consistent with the ASME BPVC Section IV.

(Log #A15/N31 ) 54/Z223.1- 5 - (1.7 Burner): Reject SUBMITTER: Wilbur L. HaagJr. , A. O. Smith Water Products Company RECOMMENDATION: Revise (d) as follows:

(d) Power. A burner which supplies air for combustion at a pressure exceeding atmospheric pressure. SUBSTANTIATION: The present definition classifies a device that increases the gas supply pressure to gas utilization equipment as a burner. The proposed definition merely describes the key feature common. to all power burners. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Tile proposal was rejected because the existing definition is consistent with the current ANSI Z-21 series product standards. Tile Panel recommends that this proposal be referred to the Z-21/83 Committee. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, Wltite

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(Log #A95/N32) 54 /Z223.1- 6 - (1-7 Cubic Ft. of Gas): Reject SUBMITTER: Wilbur L. Haag, Jr . , A.O. Smith Water Products C o m p a n y RECOMMENDATION: Delete "Cubic Ft. of Gas" defini t ion. S U B S T A N T I A T I O N : No utility would sa tura te its gas for distr ibution. A s tandard need only def ine te rms that are used in its text. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commi t tee notes that the te rm is used in tile Code, and is therefore needed . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE O N C O M M I T T E E ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead, White

(Log #A96/N33) 54/Z223.1- 7 - (1.7 Heat ing Value (Total)): Reject SUBMITTER: Wilbur L.~Haag, Jr . , A.O. Smith Water Products C o m p a n y RECOMMENDATION: Replace the defini t ion of Heat ing Value (Total) with tile following:

Hea t ine Value (TotalL For a fitel g;~s. the n u m b e r of Btus conta ined in one cubic foot of tile ~as. For any ~as. this n u m b e r decreases with increas ing al t i tude as tile amlosDberic pressure decreases . S U B S T A N T I A T I O N : Tile p resen t text is to technical to be of a practical value in the field. C O M M I T T E E ACTION: Reject. "COMMITTEE STATEMENT: The commi t tee believes tha t the defini t ion is needed . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 20 NEGATIVE: 1 N O T RETURNED: 3 Bigelow, Rhead , White

• EXPLANATION OF NEGATIVE: HAAG: The p roposed defini t ion points ou t tha t the hea t ing

value o f a gas decreases with alt i tude. Nowhere in tile p resen t code is this m e n t i o n e d .

(Log #A94/N69) 54/Z223.1- 8 - (1.7 In te r rup t ion of Service (New)): Reject SUBMITTER: Bruce J. Swiecicki, National P ropane Gas Associat ion R E C O M M E N D A T I O N : Add a new defini t ion to read as follows:

In te r run t ion of Service. T e m p o r a r y removal f rom service of an installation or por t ion of a installat ion for tile purpose of installation, ma in t enance , ret~air, or r ep l acemen t of p iping or utilization equ ipmen t . This would include the shu t t ing off of the Service Valve a n d / o r observing a depressnr ized service line. S U B S T A N T I A T I O N : The re is no specific language in NFPA 5~, National Fuel Gas Code to address leakage tests after t empora ry in te r rup t ions o f service. Section 4.2 def ines appropr ia te tests and inspect ions to pe r fo rm for new pip ing installations, and is of ten referred to when cons ider ing in te r rupt ions of service on exist ing systems. Tile visual inspect ion r e q u i r e m e n t of 4.2.1, which states that "the endre system mus t be inspected to de t e rmine that there are no open fittings or ends," places an u n d u e bu rden on the p ropane industry. P ropane compan ies mus t of ten fill empty tanks when the c o n s u m e r is no t at borne, and there fore inter ior p iping canno t be inspected. The practice of filling tanks when no one is home , or pe r fo rming o the r minor service wltich temporar i ly in ter rupts the p ropane service, can be pe r fo rmed safely because there are appropr ia te leakage tests which can be conduc ted f rom the exter ior o f tile h o m e to ensure tha t the p ropane system has no open fittings or ends, and tha t the re is no t an unacceptab le rate of leakage in the system.

This proposal would provide for a d i f ferent s t andard of care for t empora ry in te r rup t ions of service on exist ing systems, as opposed to the cu r r en t r equ i r emen t s for new pip ing systems. T he s t andard would be changed in two areas for t empora ry service interrupt ions:

1. El iminat ion of tile visual inspect ion r e q u i r e m e n t for t empora ry in te r rup t ions of service.

2. Allowing for an acceptable rate of leakage when pe r fo rming the system leak test. This would allow exist ing systems with small, non-haza rdous rates of leakage toe placed back into service. The reason such leakage would he pe rmi t t ed is to allow systems with m a m m l Stove safety pilots, or o the r sources of small acceptable rates of leakage, to be con t inued in use.

This proposal would there fore pe rmi t an LP-gas delivery person to fill a cus tomer ' s tanks when the cus tomer is no t on the premises , pe r fo rm a leakage test f rom the exter ior of the h o m e , and leave the system in an operable condi t ion if the system does no t have an unaccep tab le rate of leakage. These p roposed changes are suppo r t ed as follows:

1. The defini t ion o f " I n t e r r u p t i o n o f Service" is n e e d e d to establish a basis for in te rpre t ing the p roposed Sect ion 4.2.2.

2. The change to 4.2.1 removed ' sys tems in which the service has been in te r rup ted f rom the r e q u i r e m e n t to recognize tha t LP-gas cus tomers may not be on the premises when the conta iner is being filled; therefore , access to the system for inspect ion would no t be possible .

3. The cbange to 4.2.2 would pe rmi t the leak test to reveal "acceptable limits" to the a m o u n t of gas escaping f rom the system. Doing so would acknowledge tha t the system has open pilot l ight valves which pe rmi t gas to flow.

4. This change also recognizes tile m e t h o d used by m an y natural gas sightless when checking leakage by clocking the me te r and simply allows the LP-Gas indus t ry to utilize a device that accurately m e ~ u r e s flow in the same m a n n e r that the natural gas indust ry uses the cus tomer meter . The LP-gas device is current ly available and bas been proven by leakage tests conduc ted at over 34,000 sites.

5. The leakage rate of 1250 b t u / h r was d e t e r m i n e d based on the practice of some natural gas utilities of permi t t ing up to I cu ft per h o u r leakage rate. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The def ini t ion is rejected because the p roposed text us ing the t e rm is no t accepted [see Proposals 54/Z223.1- 54 (Log #A94a/N69) . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE A C T I O N :

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead Whi te

(Log #A42) 54/Z223.1- 9 - (1.7 NR (New))i Reject SUBMITTER: Rober t Miner , Pikes Peak Regional Bldg Dept. RECOMMENDATION: Add the following defini t ion:

NR. v e n t conf igura t ion is no t r e c o m m e n d e d due to the ootential for condensa te fo rmat ion within tile verldng system. S U B S T A N T I A T I O N : The t e rm "NR" is used in the Tables, but no t def ined. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The tables have been c h a n g e d in an errata to subst i tute "NA" for "NR". Tile tables will be revised in the 1999 edi t ion with this change . NA is def ined and a defini t ion of "NR" is no t needed . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #N94) 54 /Z223 .1 -10 - (1.7 Parking Structure): Reject SUBMITTER: Technica l Commi t t ee o.n Garages a n d Parking Structures RECOMMENDATION: Delete the defini t ion of Parking Structure. S U B S T A N T I A T I O N : A new def ini t ion of park ing s t ruc ture was added to the 1998 edi t ion o f NFPA 88A, S tandard for Parking Structures in o rder to more adequate ly descr ibed the scope o f this d o c u m e n t .

Since Section 5.1.10(a) already references NFPA 88A, it does no t appear that there is a need for a separate defini t ion in this d o c u m e n t . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e def ini t ion is used in the Code, and is n e e d e d for use of file Code. T h e commi t t ee does no t believe the users shou ld have to refer to a n o t h e r d o c u m e n t . T h e commi t t ee r e c o m m e n d s tha t the re fe renced def ini t ion shou ld be p resen ted to tile Commi t t e e for considera t ion at the Repor t on Proposals meet ing . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead , Whi te

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(Log #CP17) 54/Z223.1- 1] - (1.7 Sauna Heater, 6.25): Accept SUBMITTER: National Fuel Gas Code Commi t t ee

I RECOMMENDATION: Delete the definit ion of Sauna Heater. Delete Section 6.25 in its entirety.

S U B S T A N T I A T I O N : The section is no longer needed as the devices are no longer made. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTE E ACTION:

AFFIRMATIVE: 20 ABSTENTION: 1 N O T RETURNED: 3 Bigelow, Rhead, White

EXPLANATION OF ABSTENTION: BUCHAL: The dele t ion of coverage for Sauna Heaters implies

tha t these products no longer exist, nor will existing products be retrofitted. Deletion of coverage may be perceived as restrictive to potential manufac tu re r s of this type of e q u i p m e n t in the future.

(Log #A24) 54/Z223.1- 12 - (2.4.4(a) (New)): Reject SUBMITTER: James Anjam, Arl ington County, VA RECOMMENDATION : Add a new section to read as follows:

(:t) Sizing Criteria. T he Fuel ~as . . . . n inin~ shall be sized for the m a x i m u m length of b i t e . measures f rom the Point of delivery to the mos t remote outlet. Pinin~ shall be sized for the total dem~l ld for each section oi" pipe. Where a mult i -oressure piping system is used, gas piping shall be sized for the m a x i m u m [engtl~ of piPe measu red f rom the Gas Pressure Regulator to the mos t r emote out let in each similarly nressure section. S U B S T A N T I A T I O N : This p roposed change to IFGS would provide a clear direct ion on how to use Gas pipe sizing tables. This m e t h o d is a widely accepted eng inee r ing practice. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Commi t tee S ta tement on Proposal 54/Z22~.1- 13 (Log # A l l 0 ) . NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log # A l l 0 ) 54/Z223.1- 13 - (2.4.5 (New)): Reject SUBMITTER: [)avid Rock, City of Port land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Add new text to read as follows:

(~3) Sizin~ Criteria. The Fuel gas h id ing shall be sized for the m a x i m u m length of nine. measures f rom the ooin t of delivery to tl~e most remote outlet. Pining shall be sized for the total d e m a n d for each section of t ide . Where a mult i -oressure p ip ing svstem is used, gas piping shall be sized for the m a x i m u m Ietagtll of pipe measu red f rom the Gas Pressure Re~-ulator to the mos t remote out let in each similarly oressure section. S U B S T A N T I A T I O N : This p roposed change to NFGC would

~ rovide a clear direct ion on how to use Gas pipe sizing tables. his m e t h o d is a widely accepted eng inee r ing practice.

COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: This proposal would be restrictive as it would m a n d a t e use of the longest length m e t h o d of pipe sizing. It is in conflict with 2.4.3 which provides opt ions in the selection of pipe sizing methods . This would place a cost bu rden on systems us ing larger gas flows. NUMBER OF COMMrlq'EE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A25) 54/Z223.1- 14 - (2.5.1): Accept SUBMITTER: James Anjam, Arl ington County, VA RECOMMENDATION: Revise text as follows:

2.5.1 M a x i m u m Design Opera t ing Pressure. T he m a x i m u m desigaa opera t ing pressure for p iping systems locate d inside buildings shall no t exceed 5 psig (g4 kPa gauge) unless approved b 7 ::utl.~.rit 7 l.::vir:g jur~=;llcti.~:: ==d one or more of the following condi t ions are met:

(a) t h rough (d) u n c h a n g e d SUBSTANTIATION: T h e except ions have been the industry practice, and they are in the Internat ional Mechanical Code,

Uni fo rm P lumbing Code, BOCA Mechanical , and NFPA 54, Section 105.1 of Internat ional Fuel Gas Code draf t allows code official to issue code modificat ion, but the sect ion 402.6.1 of Internat ional Fuel Gas S tandard provides condi t ions for which allows code officials to g r an t modif icat ion for h igher pressure gas piping system. This language is no t incons is ten t with o ther parts of the code. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, Whi te

(Log'#A108) 54/Z223.1- 15 - (2.5.1): Accept SUBMrVrER: David Rock, City of Port land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Revise text as follows:

2.5.1 M a x i m u m Design Ope ra t i ng Pressure. The m a x i m u m design opera t ing pressure for p iping systems located inside buildings shall no t exceed 5 psig (34 kPa gauge) unless appr*.-'c~ a by a . . . . . " "^~; " ' ' - ~ ' : ~ :"-:-a:~' : . . . . ~ one or more of file fo l lowing condit ions are met:

Remainder is u n c h a n g e d . SUBSTANTIATION: These except ions have been the industry practice, and they are in the Internat ional Mechanical Code, Un i fo rm P lumb ing Code, BOCA Mechanical and NFPA 54. Section 105.1 of In ternat ional Fuel Gas Code draft allow code official to issue code modif icat ion, bu t sect ion 2.5,I provides condi t ions which allow code officials to g r an t modif icat ions for h igher pressure gas p ip ing systems. Presen t language encourages inconsis tency and is unnecessary, s ince the criteria for the except ion is given. COMMITTEE ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 21 N O T RETURNED: $ Bigelow, Rhead, Whi te

(Log #A29) 54/Z223.1- 16- (2.6): Reject SUBMITFER: J u d Collins, O k l a h o m a State Heal th Dept. Occupa t iona l RECOMMENDATION: Revise text as follows:

2.6.1 General . (a) M==cria! A ~ , : ~ - , : ^ ~ Materials and c o m p o n e n t s for fuel

appl icat ions shall con fo rmhag to the s tandards ~ and specifications listed here in c.r accept :Sic to. t.hc =ut .hc- ty !-avlng

(b) Used Materials. L sed pipe, fitt ings, valves, o~and other materials shall no t be u=c~ ag~n reinstalled unless they are free o f foreign materials and !z=;'c 5ccn aaccr~!=c~ ca be =.~cquatc f.~r the ~c:-,"cc in tcn~c~ approved .

(c) Other Materials. Material no t dovered by the s tandards specifications listed here in ~ha!] ~e !n ; '=6ga tc~ ~ te:tea.d tc dctcrr...inc t!~=t it ia ==re ~ - a .. .: .~k,^ CA.., .^ prop~ac~ zer-Acc, ~ A

m:z.'Mz, ct '-rcr and zSal! bc :,cccp'w.Slc tc "uhc =':'d:erity l :=- ' :g • ., ,=,a:_.:^~. shall be prohib i ted excent where annroved in

3 . . . . . . . . . . . . -

accordance with Section 105.2 of the IFGC. 2.6.2 Metallic Pipe. Metallic pipe shall comply with Sections

403.4.1 t h rough 403.4.6.4. (a) C,'~t Iron, Cast-iron pipe shall no t be used, (b) Steel and Wrou~ht-Iron. Steel and wrought- i ron pipe shall

be at [eazt of no t less than s tandard weight xCSchedule 40-)-and shall comply with one of the following s tandards:

1. St==?O.zra.4. CA~ XAr~,aâ ...~.~ c ~ , ^ . , tar . . . . g~-. e . -^ , D : ~ ANSI/ASME B36.10;

2. c . ~ . a ~ . a c p - . : ~ . : ^ ~ CA. r,:p^ c . - . t Elack and Hot Dipped,

3. Sw~=~-d Spccl.qca:2cn for Sc=mle= .Carbon Steel Pipe for • tJ:~t-..~,., T e m p e r a t u r e . . . . . . . . ASTM A106.

(c) Npdula r Iron. Nodular (ductile) i ron pipe shall comply with one of the following s tandards:

1. S tandar~ for D'-ct!!e !to= Pipe, Centrif'-g=![ 7 C=t , ":z .~Ae'."_! ~ " ~ - cr S::n~ t :~_.a ~,^,~_ c^. o__ ANSI A21.52; or

2 C~^.:~.~.*:A~ . . . . . . . . . . . . . . . . . . . . . . . . t.~, ASTM A377. Such p~pe shall be no t less than 3-inch d iameter in size, shall no t be welded, and shall be used only u n d e r g r o u n d outside bui lding

6 5 2

N F P A 5 4 - - A 9 9 R O P

founda t ion boundar ies , or aboveground , provided tha t jo in t s are proper ly res t ra ined against m o v e m e n t and separat ion.

(d) Coppe r and BFass. Copper mad brass pipe shall no t be used if the gas conta ins more than an average o f 0.3 grains of hydrogen sulfide per 100 s t andard cubic feet of gas (0.7 mil l igrams per 100 liters). T h r e a d e d copper , brass, or a l u m i n u m alloy pipe in i ron pipe sizes sball be pe rmi t t ed to be used with gases no t corrosive to such material .

(e) A l u m i n u m Alloy. A l u m i n u m alloy pipe shall comply with ~ t " . . . . . . . . . . " " . . . . . . . . . . . . . . . . . . . . . . . . . o . . . . . . . . . . . . . . .

. . . . . . . . . . ~,4~,4 . . . . . . T..~.~, ASTM B241 -(-except that the use of alloy 5456 is probibited-)-, a.qd such n ine shall be ma rked at each end of each length indica t ing compl iance . A l u m i n u m alloy pipe shall be coated to protec t agalust external corrosion where it is in contact with masonry , plaster, or insulat ion, or is subject to repea ted wettings by z'.:c! ~. l iquids SUC[~ as water, detergents , or sewage. A l u m i n u m alloy pipe shall no t be used in exterior locations or u n d e r g r o u n d .

2.6.3 Metallic Tubing . Seamless copper , a l u m i n u m alloy, o ~ a n d steel t ub ing shall c0mnlv with Sections 403.4.6.1 t h r o u g h 403.4.6.4

. . . . 1++~,4 . ~ I ~ and shall no t be v . . . . . . . . . . . . . . used w~th gases ~ corrosive to such materials.

(a) Steel. Steel tub ing shall comply with Sm=d"__~_. Spec!~c.7.~en

~ m z e d ~ : .2c ! T u ~ . n g , A S T M A 2 5 4 . (b) Copper . Coppe r t ub ing shall comply with s tandard Type 'K

or L, of c~_=~..~. :^. , t~ . e ~ - - ~ - - t- . . . . . ~r . . . . -v..~_ ASTM B88; or Spccific~.ti~:~ for Sc~:'...!c-~z C-~ppcr T ' -~c fc.r .*dr P ^ ~ : , : ^ ~ : . . . . ~ D^t.: . . . . :^~ v : ~ a Scr;Scez, ASTM B280.

Copper and brass tub ing a n d fittings -(-except t in-l ined copper tubing-)- shall no t be used if d~e gas conta ins more than an average of 0.3 grains of hydrogen sulfide per 100 s tandard cubic feet of gas (0.7 mil l igrams pe r 100 liters).

(c) A l u m i n u m ~ Alloy. A l u m i n u m alloy tub ing shall comply with Specification for Aluminum-Al loy Drawn Seamless Tubes , ASTM B210, or Specificat ion f o r Aluminum-Al loy Seamless Pipe and Seamless Ex t ruded Tube , ASTM B241. Aluminum-a l loy tub ing sball be coated to pro tec t agains t external corrosion where it is in contac t with masonry , plas ter , or insulat ion, or is subject to repeated wettings by such l iquids as wager, de te igen t , or sewage.

Aluminum-a l loy tub ing shall no t be used in exterior locations or u n d e r g r o u n d .

(d) C-~ST, . Cor ruga ted stainless steel tub ing shall be tested and listed in compl iance with the cons t ruc t ion , installation, and

~ e r fo rmance r equ i r emen t s of inter ior Fuel Gas Piping Systems lsing Cor ruga ted Stainless Steel Tub ing , ANSI /AGA LC 1. 2.6.4 Plastic Pipe, Tubing , and Fittings. Plastic pipe, tubing, and

fittings shall be used outs ide u n d e r g r o u n d only and shall con fo rm with S tandard Spcciflcatic.n fcr T!~c,wn..c.pla~t!c C^..~ Prc-~'-rc Pipe, T,.~.: . . . . . . . . . . . t,, . . . . . . . . . . . . n Fitting=, ASTM D251g. Pipe " ^ k . . . . . n shall be marked "gas" and "ASTM D2513."

Anode less Risers. Anodeless risers shall comply with the following:

(a) Factory-assembled anode less risers shall be rccc.m.mcadcd by flee m a a u f a c t u r c r approvqd for the gaz uzcd appl icat ion a n d shall be leak tes ted by the m a n u f a c t u r e r in acccrd-._qcc :'.'tie writtc:: t . . . . . . . . ~ o .

(b) Service head adapters and f ield-assembled anodeless risers incorpora t ing service head adapters shall be rec~m.. 'nended ~;." tlzc . . . . . r . . . . . . . . ¢^ . . t . . . . . . . . . ~ by tl~c m a n u f a c t u r e r annroved for the appl icat ion arid sball be des igned certified to mee t the r equ i r emen t s of Category I of ASTM D2513, and U.S. Depa r tmen t of Transpor ta t ion , Code o f Federal Regulat ions, title 49, Part 192.281(e). T h e m a n u f a c t u r e r shall provide the user qualif ied installation ins t ruct ions as prescr ibed by the U.S. Depa r t men t of Transpor ta t ion Code o f Federal Regulat ions, Title 49, Part 192.283 (b).

The ttse of plastic pipe, tub ing and fittings in und i lu ted l iquefied pe t ro leum gas p ip ing systems shall be in accordance witl~ ~ m n ~ z r d

ANSI /NFPA 58~ 2.6.5 Workmans l t ip and Defects. Gas pipe or tub ing and fittings

shall be clear and free f rom cut t ing burrs and defects in s t ructure or threading , and shall be thc.r~ugl~y h.~:zl:ed, a n d free of debris. ch ips and scale b!a;':n.

Defects in pipe or t ub ing or fittings shall no t be repaired. V.q;cn defective p!pe, t::b!ng, er fittingz are lectured in a z)~te.m, t!:e Defective material shall be replaced. (See Section 404.15.1.3.)

2.5.5 Protcc'-; 'c Coa'dng. "?.~crc "~r. :a.n'.azt : ' - '~ rn=tcria[ or =:.ma.~phere c . . . . tmg _ ~vrr. ~.z:;'e zc:: . . . . . . . . ".zl!'c p:F:.qg a n d fi.:zng'.

E x t c r n a ! o r i n t c m . . a ! c o = ~ n g z o r . . . . . . . 6 . . . . . . . . v . v - - - e , ~ .

(a) Specifications for Pipe Threads . Metallic p ipe and fi t t ing th reads shall be taper pipe th reads a n d shall comply with Stan.a~rd c^. D:-~ T h . ^ ~ a . o . . . . . ~ D . . . . . . rw~L.~ ANSI/ASME B1.20.1.

(d) T h r e a d C o m p o u n d s . T h r e a d (jc!nt) c o m p o u n d s xv.v~t-:-- , 4^~x shall be resis tant to the act ion o f l iquefied pe t ro l eum gas or ¢o any o the r chemical cons t i tuents o f the gases to be conduc ted t h r o u g h the piping.

2.6.8 Metallic Piping Join ts and Fittings. T h e type of p ip ing jo in t used shall be suitable for the p res su re - t empera tu re condit ions, lind- shall t_~ . ^1 . . . . a by = : ' ' - - . . . . : a ~ , : ^ ~ t~ provide j o in t t ightness and shall have the mechanica l s t rength uP.der requi red for the service condit ions. T h e j o in t shall be able, to sustain the m a x i m u m end force due to the internal pressure and any addi t ional forces due to t e m p e r a t u r e expans ion or contract ion, vibration, fatigue, or to the weight o f the pipe a n d its contents.

(a) Pipe Joints . Pipe jo in t s shall be threaded , f langed, or welded, and non fe r rous pipe shall also be permi t ted to a!-~-~ ~ be brazed with mater ia ls having a me l t ing po in t in excess of 1,000°F (538°C). Brazing alloys shall no t conta in m o r e t han 0.05 pe rcen t p h o s p h o r u s .

(c) Flared Joints. F i a r ed jo in t s shall be used only in systems r cons t ruc ted f rom nonfe r rous pipe and tubing. -':P.ere cxFcr:.e=ce or test.; !:a;'c dcmc.nzt.-xtcd "d~.t "dzc Such joints_ is-sl~all be suitable for the condi t ions a n d where p r ~ - ~ , s i ~ n s arc me.de i~ the dc=~g:= shall be des igned to prevent separa t ion o f the joints .

(d) tall! t ,__,. .A:__ w . . . . . . e . . . . . . . ~. . . . . . , Me c Fittings ~ . . . . . . . . . . ~, . . . . . . . . . . . . . . . . . . . . . . . . , . Metallic f i tdnes inc lud inu valves, s t ra iners and filters shall comnlv with the followinlz:

1. T h r e a d e d fittings in sizes larger t han 4 inches (100 ram) shall no t be used u n l c ~ acceptable "..he au f i z c - W ha ; ' i ng ju -= .~c : Jcn . shall ex tend at least to the outs ide e n d of the compress ion fi t t ing when installed. T h e st iffener shall be free o f r ough or sharp edges and shal l .not be a force fit in the plastic. Split t ubu la r st iffeners shall no t be used.

2. Fittings used with steel or wrought- i ron pipe shall be steel, brass, bronze, mal leable iron, ducti le iron, or cast iron.

3. Fittings used with copper or brass p ipe shall be copper , brass, or bronze.

4. Fittings used with a l u m i n u m alloy pipe shall be of a l u m i n u m alloy.

5. Cast-Iron Fittings shall no t be used in systems con ta in ing f l ammab le ~as-air mixtures .

i..m..~.nge'. -~!:~! be pe..-zn.!~ed t~ ~e u=ed. ii. Cast-iron bush ings shall no t be used.

iv. Cast-iron fittings in sizes 4 inches (100 m m ) and larger shall n o t be used indoors -~ t . . . . . . . . . . . . a i- 7 ,~. . . . . . ~'^':W h~.a~g jur lr .dic: icn.

v. Cast-iron fittings in sizes 6 inches (15 cm) and larger shall no t be used u.'=!ezz appro'. 'cd by "..~c a.u~zc.rity lza:'.'~ju.--..diz'.i~..'~.

6. Brass, bronze, o e a n d copper f i t t ingz . .~ t fng : , ff exposed to soil, shall have a m i n i m u m of 80 pe rcen t copper content .

~ 1 . . 1 1 7. A l u m i n u m alloy f i tdngs shall no t rely u o o n flareads . . . . . nc.t to form the j o i n t seal.

8. Z inc -a luminum alloy f i t t i n ~ shall no t be used in systems con ta in ing f l ammable gas-air mixtures .

9. Specie2 F'tt 'ngz. Fittings such as couplings, propr ie tary type joints , saddle tees, gland-type compress ion fittings, flared, flareless, or compress ion type tub ing fit t ings maysha l l be . . . . a . . . . --~^.~

* . . . . . . • . . . . . . . . . . . . , 4 ~ * : . . . . / O X . . . . . 4 . . . : ' , V . : ~ ~ L . . . . . . : ~

. . . . . . . - ~ v . . . . . . . . . . . . . . . . . . , . . . . . . . ~,~ . . . . . . . r ~ . . approved a n d shall be suitable for the applicat ion.

2.6.9 Plastic Piping, Joints , a n d Fittings. Plastic pipe, tubing, and f i tdngs shall be j o i n e d in accordance with the manufac tu re r s ' ins t ruct ions and the following zh~el be .~Szcr'.'cd ;-:.Lea m a k ' n g z'-ch

. / . . . . . .

(a) T h e j o in t shall be des igned a n d installed so tha t the longi tudinal pul l-out resistance of the j o i n t will be at least equal to the tensile s t reng th o f the plasdc p ip ing material.

6 5 3

N F P A 5 4 - - A 9 9 R O P

(b) Heat-fltsion jo in t s shall be made in accordance with qualified p rocedures that have been established and proven by test to p roduce gas t ight joints at least as s t rong as the pipe or tub ing be ing jo ined . Joints shall be made with the j o i n i ng m e t h o d r e c o m m e n d e d by the pipe manufac ture r . Heat fusion fittings shall be marked "ASTM D25| 3."

(c) Where compress ion type mechanica l jo in t s are used, the gasket naterial in the fit t ing shall be compatible with the plastic piping and with the gas distr ibuted by the system. An internal tubular rigid st iffener shall be used in conjunc t ion with the fitting. The st iffener shall be flush with the end of the pipe or t u b i n g ' a n d shall ex tend at least to the outside end of the pipe or tub ing and shall ex tend at least to the outside end of the compress ion fi t t ing when installed. The st iffener shall be free of rough or sharp edges and shall no t be a force force in the plastic. Split tubular st iffeners shall no t be used.

(d) Plastic p ip ing jo in t s and fittings for use in l iquefied pe t ro leum gas piping systems shall be in accordance with Standard t'a~ the Storage and Han~! ,ng a f Liq'.:c.qedq. Pc'~aIc-,:m C::aea, ANSI /NFPA 58.

2.6.10 Flanges. All- Flanges shall comply with Staaa~ard ft.= Cact . . . . . . . v . . . . . . . ~. . . . . . . . . . . . . ~, . . . . . . . . . 8°, A N S I / A S M E B16 .1 , Standard.! far P.i,qg.Iaint Ce.~kctz ::r:'J C:'oo"ea for Stcc! Pipe . . . . . . 8 ~ , ANSI/ASME B16.20 . . . . . . . . . . . . . a . . . . . . . . . . . . . . . I . - : ~ D . . . . . . . . . . D ; . . . . . . . I W:++; . . . . • , a . . . . . . . . . . . . . . . I . . . . . . . . . . . . . . . 8o, ANSI/AWWA C111/A21.11, or

..... ,~..., ~:~.:~.^. c~. ~-~ . . . . . . . c . . . . . c Pip ~ . . . . . . . . . St . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e. . . . . . ~, . . . . . . . Cotmcct'kzg . . . . . . . . . . ~ . 4 m . . . . . . e, . . . . . . . . . . . . . . . cw~, . . . . . . . "~ Fit'dnga, MSS SP-6. The p ressure - tempera tu re ratings shall equal or exceed tha t required by the application.

(a) Flange Facings. S tandard fac'[nga o,-'-~" . . . . . . ~" . . . . . v~.,,,,~:"~'* . . . . . . . . . • . . . . . . ::nc!er tl'ia C c d c . Where 150-pound steel f langes are bolted to CIz.~s 125 cast-iron flanges, the raised face on the steel f a n g e shall be removed.

(b) Lapped Flanges. Lapped flanges shall be pe.,'-mitted to bc used only aboveground or in exposed locations havin~ accessible fur inspection.

2.6.11 Flange Gaskets. Material for gaskets shall be capable of wi ths tanding the design t empera tu re and pressure of the piping system, and the chemical const i tuents of the gas be ing conducted , wi thout change to ~ gasket mater ial ' s chemical and physical proper t ies . . . . c c . . . . . . . . Where subject to fire exposure, ta t!~e jci : : t ~l~a!~ !~c co:;a!'Acr'cd :.n e!~o.~i:;g :n::tcr~a! the material shall be approved for such applications.

(a) Acceptahle materials include: 1. metal or metal-jacketed asbestos (plain or corrugated) , 2. asbestos, and 3. a h m f i n u m "O" rings and spiral wound metal gaskets.

(b) When a f langed j o i n t is opened, the gasket shall be replaced. (c) Full-face gaskets shall be used with all bronze and cast-iron

flanges. S U B S T A N T I A T I O N : T he majority of the p roposed modif icat ions are editorial in na ture and are in t ended to clarify intent , e n h a n c e readability, p romote un i fo rm interpre ta t ion, e l iminate redundancies , el iminate unnecessary c o m m e n t a r y text and make the text style and format consistent with o ther ICC codes.

The proposed modificat ions that are not editorial in na ture :ire addressed as follows in the order in which they appear in die text: '

1. Section 403.6 is r e d u n d a n t with Section 404.8 of the IFGC. COMMITTEE ACTION: Reject. COMMrFTEE STATEMENT: T he p roposed changes are more than editorial and would leave gaps in the code. Substant ia t ion was not provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #A78) 54/Z223.1- 17 - (2.6.2(c)): Accept SUBMITTER: James A. Ranfone , Amer ican Gas Association RECOMMENDATION: Delete Section 2.6.2, h e m C as follows:

~,t"~ ~ a ~ A . . l ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . (du .~ : i ! c ) : r o : : p~pc a!~a!! : a m p l 7 ... ' . l . . . . . c . . ~

. . . . . . . . . . t 9 . . . . . . . . . . .

1. St :mdard fer D::ctile Den Pipe, Centrif,.:ga!!y C~..~t, :m .~Ae*~".]

SUBSTANTIATION: N o d u l a r p i p e is n o l o n g e r u s e d i n n e w c o n s t r u c t i o n , COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VO TE ON COMMITTEE ACTION:

AFFIRMATIVE: 20

NEGATIVE: 1 NOT RETURNED: 3 Bigelow, Rhead, White

EXPLANATION OF NEGATIVE: HALLIWEEL: This in format ion should be left in the code to

allow this material to be used for repairs.

(Log #A79) 54/Z223.1- 18 - (2.6.3(b)): Accept SUBMITTER: James A. Ran fone , Amer ican Gas Associat ion RECOMMENDATIO N: Revise i tem (b) as follows:

(b)* Copper and brass tub ing shall no t b~ used if the Tas contains more than an average of 0.3 grains of hydrogen sulfide per 100 s tandard cu ft of gas (0.7 mill igrams per 100 LL Copper tub ing shall comply with s tandard Type K or L of Specification for Seamless Copper Water Tube, ASTM B 88; or Specification for Seamless Copper Tube for Air Condi t ion ing and Refrigerat ion Field Service, ASTM B 280. S U B S T A N T I A T I O N : To repeat the specific hydrogen sulfide limit stated for copper pipe in the copper tub ing section for emphasis . The limit is taken f rom sect ion 2.6.2. i tem (d) which covers copper pipe. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VO TE O N COMMITTEE ACTION:


(Log #N71) 54/Z223.1- 19 - (2.6.3(b)): Reject SUBMITTER: Dale L. Powell, Copper Deve lopmen t Assn. RECOMMENDATION: Revise text as follows:

"Copper tub ing shall comply with s tandard Type K or L of S tandard Specification for Seamless Copper Water Tube, ASTM B 88; or S tandard Specification for Seamless Copper Tube for Air Condi t ion ing and Refrigerat ion Field Service, ASTM B 280; or s tandard Type K or L of S tandard Specification for Seamless Copper T u b e for Medical Gas Systems. ASTM B 819: or starldard Type Gas n, be of S tandard Specification for Seamless Copper Tnbe for Natural Gas and Liquefied Pe t ro leum (LP) Gas Fuel Distr ibution Systems. ASTM B 837." S U B S T A N T I A T I O N : Recently, two new copper tube s tandards, ASTM B 819 and ASTM B 837, were in t roduced which has allowed manufac tu re r s of copper tube to p roduce tube to these new ASTM standards. Seamless copper tube manufac tu r ed to these new s tandards is fabricated f rom alloy C12200. This is the same alloy udlized in the manufac tu re of seamless copper tube t o the r equ i rements of ASTM B 88 and ASTM B 280, bo th of which are already accepted for use in Section 2.6.3(b)* - Metallic Tube, for use in fuel gas dis t r ibut ion systems.

Copper tube manufac tu red to the r equ i rements of ASTM B 819, S tandard Specification for Seamless Copper Tube for Medical Gas Systems, is manufac tu red in Types K and L, in drawn t emper and has the same physical d imens ions and proper t ies as tube manufac tu r ed to the r equ i rements of ASTM B 88. In addit ion, tube manufac tu red to the ASTM B 819 s tandard is internally cleaned to the r equ i rements o f CGA G4.1, the same s tandard to which ASTM B 280 tube is cleaned. In an effort to mainta in " consistency, tube manufac tu red to ASTM B 819 is color coded the same as ASTM B 88 tube, blue for Type L and green for Type K. Further , ASTM B 819 tube is marked with one of the following designat ions: OXY, MED~ OXY/MED, OXY/ACR, OR A C R / M E D in the appropr ia te color code by type.

ASTM B 837, S tandard Specification for Seamless Copper Tube for Natural Gas a n d Liquefied Pe t ro leum (LP) Gas Fuel Distr ibution Systems, was developed in response to indust ry pressure to provide an easily identifiable copper tube for fuel g a s dis t r ibut ion systems. ASTM B 837 tube mus t be identif ied as Type Gas and mus t be pe rmanen t ly incised as such, and on drawn t emper tube it mus t be fur ther idefitified with a yellow stripe a long with the type of tube, n a m e or t r ademark of the manufac ture r , or both, and the count ry of origin. Copper tube manu fac tu r ed to ASTM B 837, on a size for size basis based u p o n outside diameter , has the same physical characterist ics and proper t ies as tube manufac tu red to the r equ i rements of ASTM B 88 in Type L wall thickness or ASTM B 280. ASTM B 837 tube is identified and marked for size by actual outs ide d iamete r (same as ASTM B 280) as opposed to ASTM B 88 tube which is sized nominally.

The addi t ion of seamless copper tube m a n u f a c t u r e d to ASTM B 819 and ASTM B 837 to Section 2.6.3(b)* - Metallic Tubing , will e l iminate confus ion for both the installer and inspector by

6 5 4

N F P A 5 4 1 A 9 9 R O P

allowing the use of copper tube which meets or exceeds the requirements of existing tube accepted for use as natural gas distribution tubin~ and is being used for o ther copper piping systems widtin a given building. By adding these two seamless copper tube s tandards to 2.6.3(b)* - Metallic Tubing, this section of the National Fuel Gas Code, NFPA 54, would now be brought up to date with Volume 02.01 - Copper and Copper Alloys, Section 2, Nonferrous Metal Products Annual Book of Standards as published by ASTM.

Note: Suppor t ing material available for review at NFPA Headquar ters . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commit tee does no t see a need to add addit ional specifications for copper tubing to the Code. Other materials can be used unde r Section 1.2, Alternate Materials, Equipment , and Procedures. NUMBER OF COMMrVrEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 20 NEGATIVE: 1 NOT RETURNED: 3 Bigelow, Rhead, Wltite

EXPLANATION OF NEGATIVE: HALLIWELL: This information needs to be added to the code.

I unders tand AGA requested this s tandard be developed by CDA. I had found a manufacturer who makes this piping material.

(Log #A17) 54/Z223.1- 20 - (2.6.3(d)): Accept SUBMITTER: Robert Torbin , Foster-Miller, Inc. RECOMMENDATION: Revise text as follows:

(d) Corrugated stainless steel tubing shall be tested and listed in compliance with the construction, installation, and per formance requirements of tntcr!c.r Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing, ANSI/AGA LC-1. SUBSTANTIATION: Reason: The title of the ANSI/AGA LC 1 Standard was officially changed to "Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST)" in Addenda 1 LC la- 1993.

Substantiation: Referenced industry standards should reflect latest versions. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A69) 54/Z223.1- 21 - (2.6.8(d).2): Reject SUBMITrER: David Rock, City of Port land (Oregon Mechanical Officials Association) RECOMMENDATION: Revise as follows:

2. Fittings used with steel or wrought-iron pipe shall be steel, br. '~, bronze, malleable iron, ducti le iron, or cast iron. The fittings shall be comnatible with. or shall be of the same material .as. the nine or tubing. Bushines and running threads shall not be utilized, SUBSTANTIATION: Running threads are not tapered, do not provide min imum required surface contact at pipe joints, and do not comply with ASME B1.20.1, (Stand,'u'd for threaded joints) and are not reliable for pressure piping systems.

Until this year, The term "running thread" was used in tiffs code (IMC) and the IMC in sentences that stated " runn ing threads shall not be concealed." Tl)is code change will make it clear that running threads are now prohibi ted. Thread protectors are an example of a runn ing thread and are not in tended for use as a pipe fitting. This proposal reflects the results of a code change made to the IMC this spring at the Oakbrook Hearings which upheld th roughou t the second llearings. This proposed code change is compatible with the 1997 revisions to Section 1303.7 of the International Mechanical Code. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Fittings are adeqnately covered in 2.6.8. Running threads are already prohibi ted by 2.6.7. The commit tee believes that bushings are accep t a~e fittings. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A147) 54/Z223.1- 22 - (2.6.8(d)2): Reject SUBMITrER: Steven Shapiro, Hampt on Virginia RECOMMENDATION: Revise as follows:

2. Fittings used with steel or wrought-iron pipe shall be steel, brass, bronze, malleable iron, ducti le iron, or cast iron. The fittings shall be comoatible with. or shall be of the same material as. the Dine or tubing. Bushings and runn ing threads shall not be utilized. SUBSTANTIATION: Running threads are no t tapered, do not provide min imum required surface contact at pipe joints, and do not comply with ASME B1.20.1, (Standard for th readed joints) and are not reliable for pressure piping systems.

Until this year, The term "running thread" was used in this code (IMC) and the IMC in sentences that stated "running threads shall not be concealed." This code change will make it clear that runn ing threads are now prohibi ted. Thread protectors are an example of a runn ing thread a n d a r e no t in tended for use as a pipe fitting. This proposal reflects the results o f a code chaxage made to the IMC this spring at the Oakbrook Hearings which was uphe ld th roughou t the second hearings. This p roposed code c h a n g e is compatible with the 1997 revisions to Section 1303.7 of the International Mechanical Code. COMMITTEE ACTION: Reject. COMMITYEE STATEMENT: Refer to Commit tee Sta tement on Proposal 54-21 (Log #A69). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A93/N68) 54/Z223.1- 23- (2.6.8(d)6): Reject SUBMITTER: Bruce J. Swiecicki, National Propane Gas Association RECOMMENDATION: Revise text to read as follows:

6. Brass, Bronze, or Copper F i t t i ngs . . ~ t t ! : g : , :.f c::~.~:ad to. :oil, ~l-all h.z-'c .~ min imum 80 pcrcc~t zc.ppcr zc.ntc~t. Fittinws shall be acceotable for installation u n d e r g r o u n d based on local history or protec ted f rom local soil condi t ions in accorclaoce with Sectiorl 2.6.6. SUBSTANTIATION: Commonly available fittings containing less than 80 percent copper have historically pe r fo rmed well in many locations. Tile in tent of the p roposed change is to rely upon per formance or iented language that specifies addit ional protect ion against corrosion were warranted by local soil conditions. COMMITTEE ACTION: Reject. COMMrITEE STATEMENT: Local soil condit ions vary in a community, and this cou d lead to corrosion problems with unde rg round piping systems. No criteria are provided for acceptable soils. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 20 ABSTENTION: 1 NOT RETURNED: 3 Bigelow, Rhead, White

EXPLANATION OF ABSTENTION: BUCHAL: The rationale for the specification for 80 percent

copper con ten t for fittings exposed to soll is with merit, however my concern is the availability of that information to the installer. If that informat ion is not readily available, what is the significance of the requirement?

(Log #A67) 54/Z223.1- 24- (2.8.2): Reject SUBMITTER: Dale Watterson, Madison Gas & Electric RECOMMENDATION: Revise text as follows:

"The gas pressure regulator Iocation.. . . the connect ions (and regulator) are...." SUBSTANTIATION: The "connections" in 2.8.2 are no t def ined in the code and can be in terpre ted to mean piping of any distance from the regulator. The "connections" and regulator need to be readily accessible, COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: T h e proposal would no t clarify the Code. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


655

N F P A 5 4 ~ A 9 9 R O P

(Log #CP18) 54/Z223.1- 25 - (2.8.2): Accept SUBMITTER: National Fuel Gas Code Commi t t ee RECOMMENDATION: Revise text to read:

2.8.2 The gas pressure regulator shall be accessible for servicing. S U B S T A N T I A T I O N : To clarify the r equ i r emen t and to delete the r e q u i r e m e n t to be readily accessible, which is no t n e e d e d for service. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A135) M / Z . . 3 . 1 - 26 - (2.8.4(a)1 Exception): Accept in Principle SUBMITTER: James A. Ranfone , Amer ican Gas Associat ion RECOMMENDATION: Revise Exception as follows:

Exception: A regulator and vent l imiting means combinat ion listed as complying with the S tandard for Gas Appl iance Pressure Regulators, ANSI Z21.18 or the Standard for Combina t ion Gas Controls for Gas Appliances, ANSI Z21.78, shall be permi t ted to be used without a vent to the outside, provided the regulator and vent l imiting me;ms are installed irl :'. -'cntilP.tc~ [o~:~8r; ,an accessible Iocatiorb S U B S T A N T I A T I O N : There is no defini t ion for ventilated space. COMMITTEE ACTION: Accept in Principle. Revise the .Except ion to read: Exception: A regulator and vent l imiting means combina t ion listed ,~s complying with the Standard for Line Pressure Regulators, Z21.80 S'.:mdard for C.-.z App!iancc Prcssure Rcgulator~, .A~.rS! Z2!.I E or the S',xnd~rd for Combir:a 'don C"~ Co,=trola for Caa A . . . . I ; . . . . . . A l ~ l l 2 ' l " 7 c 1 1 ~TQ • " . • ~vv . . . . . . . . . . . . . . . . . . . . . . , shall be permntted to be used without a vent to the c=:~ide ou tdoors , prc'.~.~e~ t!ze regt:!atcr z ~ vent

COMMITTEE STATEMENT: T he reference s tandard is corrected. Similar to regulators on appl iances which have been safely used for many years. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A80) 54/Z223.1- 27- (3.1.5): Accept in Principle SUBMITTER: James A. Ranfone , Amer ican Gas Association RECOMMENDATION: Revise sect ion 3.1.5 as follows:

3.1.5 Piping t h rough Founda t ion Wall. U n d e r g r o u n d piping, where installed below grade t h rough the outer founda t ion or b a s e m e n t wall of a building, shall be encased in a protective pipe or shall be protected against corrosion by coat ing or wrapping with a t illcrt material annroved for such anolications. T he annu la r space between the gas piping and the sleeve shall be sealed at the founda t ion or b. 'tsement wall to prevent entry of gas or water. S U B S T A N T I A T I O N : To permi t two addi t ional me t hods of corrosion protect ion ei ther by coat ing or wrapping as already pernfi t ted for above g r o u n d outside wall penet ra t ion in section

. ¢ 3.6.2. COMMITTEE ACTION: Accept in Principle. Revise 3.1.5 to read:

3.1.5 Piping t h r o u g h Founda t ion Wall. U n d e r g r o u n d piping, where installed . . . . . . . ~.~l . . . . . . ~, . . . . .a~ th rough the

outer founda t ion or b a s e m e n t wall of a building, shall be encased in a protective pipe. T he .~.rm'.:!ar space between the gas p ip ing and the :!cc-'c buildiniz shall be sealed at thc fo'.:r.da'don or ba.,;z:;;z:.t ;'.'a!! to prevent enu-y of gas or water.

Accept the proposal and dele te "below grade" in the first s e u t e r l c e .

COMMITTEE STATEMENT: Accepted with editorial clarification. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #NI ) 54/Z223.1- 28 - (3.1.5, 3.2): Reject Note: This Proposal appea red as 54-22 which was he ld f rom the

Annua l 96 ROC on Proposal 54-44. SUBMITTEPa Frank Volgstadt , Perfect ion Corpora t ion RECOMMENDATION: 1. Delete Section 3.1.5.

2. Add new Section 3.2 ( r e n u m b e r o ther sections as required) : 3.2 Service Lines: Plastic. Each plastic service line (ed.) outside

a bui ld ing mus t be installed below g r o u n d level, except tha t it may te rmina te above g r o u n d and outside the building, if:

(a) The above g r o u n d part of the plastic service line is protected against deter iorat ion and external damage; and

(b) The plastic service line is no t used to suppor t external loads. S U B S T A N T I A T I O N : Section 3.1.5 shou ld be de le ted as it prevents the use of Anodeless Risers which were developed in 1970 to provide for a safe cost effective m e t h o d to te rmina te plastic pipe above g round . This m e t h o d thus provides for a me th o d to te rminate an all plastic service line above g r o u n d a n d outside the building. This m e t h o d precludes the need for the riser to have an anode mad meet specific cathodic protect ion requi rements . This is the case if section 3.1.5 is enforced. Anodeless Risers have been snccessfully used by all major gas dis t r ibut ion utilities since the early 1970's.

The above NEW Section 3.2 is n e e d e d to def ine how plastic pipe shall be permi t ted to te rmina te above g r o u n d in a plastic to steel transit ion. Thus , the plastic to steel t ransi t ion takes place above g r o u n d (to prec lude the need for cathodic protect ion) u n d e r control led condit ions. This section 3.2 wording is taken directly f rom Part 192.375 of the Code of Federal Regulations, Title 49, Subchapte r D - Pipeline Safety. Similar wording was ad d ed to the 1992 edit ion of NFPA 58 as r e c o m m e n d e d by the National P ropane Gas Association's Techno logy and Standards Commi t t ee and approved by the NFPA Board of Directors in February of 1989.

T h e above proposed revisions make all th ree Codes consis tent in permi t t ing plastic pipe to te rmina te ( t ransi t ion) above g r o u n d u n d e r specified condit ions. The safety of the service line installation is e n h a n c e d by e l iminat ing tha t last por t ion of buried steel g a s p i p i n g subject ing it to cathodic corrosion. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Paragraph 3.1.7 addresses the concerns adequately. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFI RMATWE: 21 N O T RETURNED: 3 Bigelow, Rhead, White

(Log #A81 ) 54/Z223.1- 29- (3.3.3): Accept SUBMITTER: James A~ Ranfone , Amer ican Gas Associat ion RECOMMENDATION: Revise Section 3.3.3. as follows:

3.3.3. Gas Piping to be Sloped. Piping for o ther than dry gas condi t ions shall be s loped no t less than 1 / 4 in. in 15 ft (0.7 cm in 4.6 m) to prevent traps. Hor~zonta! F.nc~ ~ha!! ~!opc uF:;-ard t.c

S U B S T A N T I A T I O N : The deleted sen tence is confus ing as written. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead, Whi te

(Log #A82) 54/Z223.1- 30- (3.3.4): Accept in Principle SUBMITTER: J ames A. Ranfone , Amer i can Gas Associat ion RECOMMENDATION: Revise Section 3.3.4 as follows:

3.3.4 Above-Ceiling Locations. Gas p ip ing shall be permi t ted to be installed in accessible spaces betweer~ a above fixed ceiling ~pace.~ and a d r o p p e d ceiling, whe the r or no t such spaces are used as a p l enum. Valves shall no t be located in such spaces.

Exception: Equ ipmen t shutof f valves required by the Code shall be permi t ted to be installed in accessible above-ceiling spaces conta in ing vented gas utilization equ ipmen t . S U B S T A N T I A T I O N : To clarify the in t ended above-ceiling location space where gas piping is permit ted . T h e change would also clarify that an attic is no t an above-ceiling location. COMMITTEE ACTION: Accept in Principle.

I Revise Section 3.3.4 as follows: 3.3.4, ~o ; ' e Ceiling Locations. Gas p ip ing shall be permi t ted to

be installed in accessible soaces between a .2.5.v-'e fixed ceiling

6 5 6

N F P A 5 4 - - A 9 9 R O P

--pace: and a d r onned ceiling, whether or no t such spaces are used as a plenum. Vaives shall no t be located in such spaces.

Exception: Equipment shutoff valves requi red by the Code shall be permit ted to be installed in accessible ceiling spaces containing vented gas utilization equipment . COMMITTEE STATEMENT: The proposal is accepted and the title is revised for clarity. NUMBER OF COMMITFEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: $ Bigelow, Rhead, White

(Log #N25) 54/Z225.1- $1 - (3.4.2): Accept in Principle SUBMITTER: Douglas B. Peabody/Edward J. Peznowski, CT Office of State Fire Marshal RECOMMENDATION: Retitle Section $.4.2 as follows:

"Connections in new installations or modernizations" SUBSTANTIATION: The current title of the section infers that the connect ions specified within the section deal with original (initial) gas piping installations. Thus, this section has been applied by code enforcement officials and piping mechanics to mean that existing installations no t using fittings as described by the section must be removed and reinstalled to the current standard. Given this code application, this section would appear to conflict with Section 1.3 - Retroactivity. COMMITTEE ACTION: Accept in Principle.

I Revise the title of 3.4.2 to read: "Connections". COMMITTEE STATEMENT: The commit tee agrees that the title should be revised, and believes that the simpler tide, "Connections" is simpler and meets the intent o f the proposal. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP1) 54/Z223.1- 32- ($.4.2): Accept SUBMITTER: National Fuel Gas Code Commit tee RECOMMENDATION: Revise 3.4.2 to read:

$.4.2 Connect ions in Original Installations. When gas piping that is to be concealed is being installed, unions, tubing fittings, . . . . . . . . . . . . . . :_~, , . .~ .4o , right and left couplings, bushings, swing joints, and compression couplings made by combinations of fittings shall not be used. Pipe fittings such as elbows, tees, and couplings shall be permit ted to be used.

Remainder is unchanged. SUBSTANTIATION: Running threads are prohibi ted in 2.6.7 which requires tapered threads. COMMITI'EE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP2) 54/Z223.1- 33- (3.4.6): Accept SUBMIq[TER= National Fuel Gas Code Commit tee RECOMMENDATION: Delete $.4.6 and relocate the text of $.4.6 but not the Exceptions, to a new $.4.2, Exception No. 3, to read:

Exception No. 3: Where necessary to insert fittings in gas pipe that has been installed in a concealed location, the pipe shall be permit ted to be reconnec ted by welding, flanges, or the use of a g round jo in t union with the nut center -punched to prevent loosening by " " n . . . . . . . . :^_ ^t...L.:~_ : . . . . . . . . ,^.~ wbrauon . . . . . . . . . . . . . . . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . U . . . . . . . . . . . .

SUBSTANTIATION: This clarifies code language and the committee 's in tent for connections, and combines reconnect ions with connect ions for ease of use. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #N26) 54/Z225.1- $4- ($.5): Accept SUBMITTER: Douglas B. Peabody/Edward J. Peznowski, CT Office of State Fire Marshal

I RECOMMENDATION: Revise Section 3.5 as follows:

3.5 Piping in Vertical Chases. When ~ piping exceedir~g 5 ~ i g is located within vertical chases in accordance with Section 2.5.1(bl. the reouirements of Section 3.5.1 th rough 3.5.3 shall annlv. SUBSTANTIATION: As presented, Section 3.5.3 appears to apply to all chases, no t jus t the chases containing gas piping with

ressures in excess of 5 psig. OMMITI'EE ACTION: A.cce~t.

] Accept and change "when" to 'where". NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A29a) 54/Z225.1- 35 - (3.6): Accept SUBMITTER: Jud Collins, Oklahoma State Health Dept. Occupat ional RECOMMENDATION: Revise text as follows:

3.6 Gas Pipe Turns. Changes in direction of gas pipe shall be pc rm ' t t cd t~ b¢ made by the use of fittings, factory bends, or field bends.

3.6.1 Metallic Pipe. Metallic pipe bends shall comply with the following:

(a) Bends shall be made only with bending equipment and procedures =pczL~!l 7 in tended for that purpose.

(b) All Bends shall be smooth and free from buckling, cracks, or other evidence of mechanical damage.

(c) The longitudinal weld of the pipe shall be near the neutral axis o f the bend.

(d) Pipe shall not be bent th rough an arc of more than 90 degrees.

(e) The inside radius of a bend shall be not less than 6 times the outside diameter of the pipe.

$.6.2 Plastic Pipe. Plastic pipe bends shall comply with the following:

(a) P!~.:fic t-.t--:- ̂. . . . . . . . .h~,l '~.^ porto-tied t~. bc ~:.~t p . -c ' /d :d ".~k.:.: The pipe is-shall not be damaged and the internal d iameter o f the pipe is-shall not b e effectively reduced.

(b) Joints shall not be located in pipe bends. (c) The radius of the inner curve of such bends shill no t be less

than 25 times the inside diameter of the pipe. (d) Where the piping manufacturer specifies the use of special

bending equipment or procedures, such equ ipment or procedures shil l be used.

$.6.4 Elbows. Factory made welding elbows or transverse segments cut theref rom shall - - t- . . . . . . . . . . . . . . . . . . . . . . . . . m~-

. I .4 . I I . I . ": ~ - ' : : ~c= , F ro : '+ :+ ~- : : ~- : have an arc length measured along the crotch is- of at least 1 in. (2.5 cm) i ~ f o r pipe sizes 2 in. and larger. SUBSTANTIATION: The majority of the proposed modifications are editorial in nature and are in tended to clarify intent, enhance readability, p romote uniform interpretat ion, eliminate redundancies, eliminate unnecessary commentary text and make the text style and format consistent with o ther ICC codes.

The proposed modifications that are no t editorial in nature are addressed as follows in the order in which they appear in the text:

1. Section 405.6 is r edundan t with Section 404.8 of the IFGC. COMMITTEE ACTION: Accept. NUMBER OF COMMITFEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A83) 54/Z223.1- 36 - ($.7.1): Accept SUBMITrER: James A. Ranfone , American Gas Association

[ RECOMMENDATION: Revise S e c f o n 3.7.1 as follows: I 3.7.1 Provide Drips Where Necessary. For o ther than dry. I condit ions, a drip shall be provided at any point in the line of pipe I where condensate could collect. Where required by the authority I having jurisdiction or the serving gas supplier, a dr ip shall also be I provide at the outlet of tile meter. This drip shall be so installed I as to constitute a trap wherein an accumulat ion of condensate will I shut off file flow of gas before is will run back into the meter.

SUBSTANTIATION: To clarify that drips are necessary when other than dry gas is being supplied. COMMI'ITEE ACTION: Accept. NUMBER OF COMMI'FrEE MEMBERS ELIGIBLE TO VOTE: 24

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N F P A 5 4 - - A 9 9 R O P

VOTE ON C O M M I T T E E ACTION: AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, White

(Log #A68) 54/Z223.1- 37- (3.10.1): Reject SUBMITTER: Dale Watterson, Madison Gas & Electric RECOMMENDATION: Revise text as follows:

"(A readily) accessible gas . . . .ups t ream (within 6 ft and in sight o_.0 each gas...." S U B S T A N T I A T I O N : Some gas utilities require a "customer" valve downs t ream of the me te r on the cus tomer p ip ing outs ide of building. Some installers believe this meets the valve r equ i r emen t s for 2 p o u n d gas regulators. Since 2.8.2 calls for "Readily accessible" regulator connect ions , the valve shou ld also. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T he Commi t tee believes that the

- proposal is overly restrictive prescriptive design. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow; Rhead. White

(Log #Ag) 54/Z223.1- 3 8 - (3.10.1 Except ion (New)): Reject SUBMITTER: Russel lwan, Metropol i tan Utilities District RECOMMENDATION: Add text to read:

Exception: In single family or multi-family buildings with separate meters to each unit , an accessible gas shu to f f valve shall no t be requi red ups t r eam of a gas pressure regulator if this is the only regulator in the p ip ing system. S U B S T A N T I A T I O N : In bui ldings with only one regulator, tile valve ups t r eam of the regulator has no useful purpose, ff the regulator needs m a i n t e n a n c e or is to be changed, tile shutoff valve at d~e meter set would be used to shu t off the fuel line, COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T he commit tee believes that a shutof f valve for each un i t is needed , and that the main shutof f valve should no t be used for dais purpose. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A29b) 54/Z223.1- 39 - (4.1, 4.2, and 4.3): Reject SUBMITTER~ J u d Collins, O k l a h o m a State Heal th Dept. Occupa t iona l RECOMMENDATION: Revise text as follows:

4.1.1 (d) Tie-lr¢ Pining. Ecz~ : : c :t :.~ z.~:~.z'.2mc~ Where necessary to

divide a p ip ing system into test sections and install test heads, connec t ing piping, and o ther necessary appur t enances for testing, it is no t requi red tha t tile tie-in se/Jtions of pipe be pressure tested. Tie-in connec t ions , however, shall be tested with noncmlos ive leak detect ion fluid after gas has been in t roduced and the pressure has been increased suff iciendy to give some indications shou ld leaks exist. (See caut ion following 404.15.5.2.)

(e) Test procedure . T he test p rocedure used shall be capable of disclosing all leaks in the sect ion be ing tested and shall be ze!ected after gi ;"ag d::c cc.~z!dcr=t!c.= t~ suitable for the volumetric contk)nt alld location of the sect ion z~d to. !~ !.~c~t!c.~.

(0 Section Isolation. A piping system shall be v . . . . . . . . . : " ~ "~ ~'~o~ tested as a comple te un i t or in sections. U n d e r no c i rcumstances shall a valve in a line be used as a bu lkhead between gas in one section of tile p ip ing system and test m e d i u m in an ad jacent section, unless two valves are installed in series with a valved "tel! talc" outlet located between these valves. A valve shall no t be subjected to the test pressure unless it can be d e t e r m i n e d tha t the valve, including the .valve closing mechan i sm, is des igned to safely withstand the test pressure.

4.1.2 Test Medium. T he test m e d i u m shall be air, ni trogen, or carbon dioxide. Oxygen shall ~cver n o t be used.

Exception: Fuel gas shall be permi t ted to be used in piping systems opera t ing at pressures of 0.5 psig (3.4 kPa gauge) or less.

(a) lo int insoect ion. Pipe joints , inc lud ing welds, shall be left exposed for examina t ion du r ing the test. :t.. ,t.̂ .~.~ ~:v.v ~ . . . . ~--~J'4 :^:_._ . . . . . ..~.~' . . . . .

perm!t tcd to. ~c c.~;'crcd cr center . led. 4.1.3

(c) E q u i n m e n t Isolation. Appl iances and e q u i p m e n t tha t is no t to be inc luded in the test shall be e!*..~.er d i sconnec ted f rom the p ip ing or isolated by blanks, b l ind flanges, or caps. F langed jo in t s at which blinds are inser ted to blank off o ther e q u i p m e n t du r ing the test shall no t be requi red to be tested.

4.1.5 (b) Leak Detection. The leakage shall be located by m ean s of

an approved c~m~::e~b!c gas detector, a noncorrosive leak detect ion fluid, or o ther approved leak detect ion methods . Matches, candles, open flames, or o the r m e t h o d s tha t could provide a source of igni t ion shall no t be used

Where leakage or o ther defects are located, the affected port ion of the p ip ing system shall be repai red or replaced and retested. (See 404.15.1.3.)

4.3.4 Placing Equ ipmen t in Opera t ion. Gas utilization e q u i p m e n t shall ~ be Fcrm:.tted t~ bc placed in operat ion uqtil after the piping system has been tested and de t e rmin ed to be free of leakage and pu rged Jn accordance with 4.3.2.

4.3.1 Removal f rom Service. 9.n.:ea Where gas piping is to be o p e n e d for servicing, addit ion, or modificat ion, tile section to be worked on shall be t u r : c ~ c.ffisolatec~ f rom the gas supply at t)~c .xcarczt zcm'.'cm)cnt pc.!nt, and the line pressure sball be vented to the outdoors, or to ventilated areas of sufficient size to prevent accumula t ion of f l ammable mixtures .

!f t.k.i~ Where the sect ion to be worked on exceeds the lengdls shown in Table 404.15.8.1, the r emain ing gas shall be displaced with an iner t gas.

4.3.2 Placing in Operat ion. V.n.:cn ~ piping .~!! ~f conta in in~ air is placed in operat ion, thi) air in the piping shall be displaced with fuel gas, provided ~ the pi~ing does not exceed the length shown in Table 404.15.8.2. The aar ¢=m~is to be ~a:%!;.' displaced with fuel gas b_~ . . . . an ̂ a that nrovidin~ a modera te ly rapid and con t inuous flow of fuel gas that is in t roduced at one end of the line m~d- with the air is-being vented out at the o ther end. Tbe fuel gas flow gh.~uld shall be con t inued without in ter rupt ion until the vented gas is free of air. The poin t of d ischarge shall no t be left una t t ended du r ing purging. The vent shall fi~c:: be closed

far I~ after the p u r ~ n g is complete. ~ tt.c For p ip ing is. 3 inches or larger, the air in the piping shall be displaced with an iner t gas, and the iner t gas shall t hen be displaced with fuel gas. S U B S T A N T I A T I O N : The majori ty of the p roposed modif icat ions are editorial in na tu re a n d are in tended to clarify intent, e n h a n c e readability, p romote un i fo rm interpre ta t ion, e l iminate redundancies , e l iminate unnecessary c o m m e n t a r y text an d make the text style and format consis tent with o ther ICC codes.

The proposed modif icat ions tha t are no t editorial in na ture are addressed as follows in the order in which they appear in the text:

1. Section 403.6 is r e d u n d a n t with Section 404.8 of the IFGC. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The p roposed changes are m o r e than editorial and would leave gaps in tile code. Substant iat ion was no t provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead , White

(Log #A33) 54/Z223.1- 40 - (4 .1A(b)) : Reject S U B M r I ~ E R : J ames Anjam, Arl ington County, VA RECOMMENDATION: Revise as follows:

(b) Inspect ion shall consist of visual examina t ion , du r ing or after manufac ture , fabrication, assembly, ~r pr -~:urc tczt a~ :pprcpr ' . : t e . Before any system of ~as n in in~ is ou t in service or concealed. It shall be tested to e n s u r e t h a t ] t i s~as tieht. Testing. insnect ion and pur~ ing of gas piping systems shall comply in accordance with sect ion 404.15. Supp lemen ta ry types of nondes t ruc t ive inspect ion techniques , such as magne t ic particle, radiographic , ultrasonic, etc., shall no t be requ i red unless specifically listed he re in or in the eng inee r ing design. SUBSTANTIATION: Tile cur ren t text is in non-manda to ry language and would be difficult to enforce. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The cu r ren t language is manda to ry in that a series of opt ions is provided, bu t one mus t be used. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


6 5 8

N F P A 5 4 ~ A 9 9 R O P

(Log #A34) 54/Z223.1- 41 - (4.1.1 (c)) : Reject SUBMITTER: Paul Cabot, self RECOMMENDATION: Revise text as follows:

(c) In die event repairs or addi t ions are made following the pressure test, the affected p ip ing shall be tested.

inapcctcd and c~nnee t ' ana are teated ; ' ~ t ' - : n a n cc.rr, aai':c Ica'- a . . . . . :_~ n . . : . 4 . . . . ~.-. ] . ~ i . a . . . . . : . . . . . , .â . . . . . . . . . a E)' ~:c

SUBSTANTIATION: This except ion is difficult to in terpre t and enforce. Minor repair is no t def ined in IFGC and is a relative term. What could be m i n o ( t o me may be major to s o m e o n e else. Section 105 of IFGC covers this a rea and sbould be loft up to individual jur isdic t ion to decide how to test m i no r gas piping installations. Even t h rough soap test is c o m m o n l y used in gas piping installations is no t practical to expect inspectors to pe r fo rm this test a n d again should be left up to individual jurisdict ion. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T he commit tee believes that this is clear and needed. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: .3 Bigelow, Rhead, White

(Log #A35) 54 /Z223 .1 - 42 - (4.1.1 (d), (e), and (f)): Accept in Principle SUBMITTER= James Anjam, Arl ington County, VA RECOMMENDATION: Revise text as follows:

(d) gccauac :t : = aamct:: 'ac: necea:ary .o d:-~dc a p ;p ;ng a;.~tcm

o ther nec~gary appur t cnancea f~r tenting, !t ! a :=~t rcqu: rcd "..hat the de in sec'2an= a f p~pc 5c prca=;urc t ~ t cd . T ' c !n ccnn=-ct!ana,

t p F f d" " ' ~ - " " r^~, TI-c tea r.7,ccdurc . . . . . . . . . . . . . . . a ~ . ~ , , c c= : M e a :c lc : : g ^ " . . . . .

~aca'dan; (0 ~ A pip ing system shall be pcrn . ' t t ed tc be tested as a

comple te uni t or in sections. U n d e r na c!rc'.:mz'~,~ce: zh~2! a :~2;'e in a line be ".:acd a= . . . . . . , . . . . . . . . . . . . . g ~ in ane accfie.n af the

"'~'"~" ~' . . . . . . . . . ":~°~"2:£'27.';;."2 =L;.YFJ .~£;;~.2~5. 7 2 2 723"~2 . ; -~_

tl.cac valveg. A ; : l : 'c algal! ha{ bc aubjcctcd ta fi:c teat prcaaurc unlca: kq can 5c de t e rmi ned tha t the :'a!-'c, inc luding "&c :-2-'e clog!ng .-n.ec!:an!g:n., :: dez!gned tc :.~£e!}" ::~.t!-smnd due te : t

S U B S T A N T I A T I O N : This is a m i n i m u m code standard, above language belongs in the installation manual . COMMITTEE ACTION: Accept in Principle. Accept the proposal and Add a new A-4.1.1 to read:

"Because it is somet imes necessary to divide a piping system into test sections and install test heads, connec t ing piping, and o ther necessary appu r t enances for testing, it is no t requi red tha t the tie- in sections of pipe be pressure tested. Tie-in connect ions , bowever, should be tested with a noncorrosive leak detect ion fluid .after gas has been in t roduced and the pressure has been increased sufficiently to give some indicat ions if leaks exist. [See A.4.1.5(b).]

The test p rocedure used shou ld be capable of disclosing all leaks in the section being tested and shou ld be selected after giving due considerat ion to d~e volumetric con ten t of the sect ion and to its location.

U n d e r no c i rcumstances sbould a valve in a line be used as a hu lkhead between gas in one section of the piping system and test m e d i u m in an adjacent section, unless two valves are installed in series with a valved "tell-tale" located between these valves. A valve should no t be subjected to the test pressure unless it can be de t e rmined that tbe valve, inc lud ing the valve closing mechan i sm, is des igned to safely withstand d m test pressure. COMMITTEE STATEMENT: The Commi t tee agrees that the Code shou ld no t contain non -manda to ry text. T he text is moved to the Appendix . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #A118) 54/Z223.1- 45 - (4.1.1(d), (e), and (f)) : Accept in Principle SUBMITTER: David Rock, City of Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Revise text as follows:

(d, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ; . . . . . . . . . _,-',r" - - ~ a;.:tcm

t h e " : ^ : . . . . " : . . . . c ~ : - ^ I - . . . . . . . . . . ~ . .â m : ~ : . . . . . . . . : ^ - .

Ea:"c;'cr, a~all 5c tc: te ; ; '~: a n~nc~: ' rc: ' - 'c !c=k dct=c~a.n f lu 'd

g u f f i c i e n * - . ! ) " t c *'= . . . . . . . : - ~ : . ^ ~ : ^ ~ . : c , ~ , . . . . . : ~ . r c ^ ~ ... A "t c , ' k ' , ~ .

: - " : ' ^ ' 2 L ~ . K S ~ . . . . . . . . . . . . . . . . . . . . v . . . . . . . . . . . . . . . . ~ . . . . . .

!~cat!en. ( f ) (d~ A p i p i n g s y s t e m s h a l l b e r . . . . . . . . . . . . . . t e s t e d a s a

comple te un i t or in sections. U n d e r no. c'rcun.~ta=cc~ ~ba!! a v a ! - ' e ; n n I ; n n ~'- . . . . . ~1 - - . - - K . . I I . I . ^ ~ A k ^ + . . . . . . . . . : . . . . . . . . 1 ~ - - ~ f * h ~

l ~ " E " " " 1 ~ ~ I . . . . . . . . . . . . . . . . . . . . . . . . . . . . J . . . . . . . . . . . . . ' . . . . . . . . . .

;~-!;'e: are in:w2!cd !n acr'^.~ ";-tb a ",~!':cd "td! ".=!e" !~c.=ted ~c~;:cen t~hczc -:l-'ca. A ;~2;'c :hal! n~.t bc :ubjcc tcd t~ =.he =cat F r c : u r c u n ! e ~ :n cv.~n be de t e rmined "...ha'-. tbe :~_.!ve, :.nc!'.=ding the ".~!;'e c,~o,..~'̂ -:-- mcc 'aan 'am, :.a dcz 'gncd tc aafcly ..a.~. . . . . . . . . . . . . . . . . . . . . a .,. . . . . . -

S U B S T A N T I A T I O N : This is a m i n i m u m code s tandard, above language belongs in the installat ion manual . COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z22g. l -42 (Log #Ag5). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITrEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigeiow, Rhead, White

(Log #A.g6 ) 54/Z223.1- 44 - (4.1.1(g)): Reject SUBMITTER: J ames Anjam, Arl ington County, VA RECOMMENDATION: Delete text as follows:

S U B S T A N T I A T I O N : Fabricated parts shou ld be tested as a par t O f the gas system. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commi t tee believes tha t test ing at the t ime of fabrication is acceptable. No technical suppor t is provided for the proposal. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: $ Bigelow, Rhead, White

(Log #A37) 54/Z223.1- 45 - (4.1.2): Accept SUBMITTER: James Anjam, Arl ington County, VA RECOMMENDATION: Revise text as follows:

4.1.2 Test Medium. The test m e d i u m shall be air, n i t rogen, or carbon dioxide. OXYGEN SHALL NEVER BE USED.

. . . . . 12 . . . . . r . . . . . :An. F'-'e! g ~ :b~! k-e pe rmi t t ed te he u : ed !:= p ip ing

S U B S T A N T I A T I O N : This except ion covers all low-pressure gas piping systems tha t are a large por t ion of gas p ip ing installations today. IFGS does no t specify the test p rocedure with the fuel gas

C % ~ d ~ r ' ~ E E AC' r lON: Accept. COMMITTEE STATFaMENT: Refer to Commi t t ee action on 54/Z223.1-46 (Log #A121). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


( Log #A121 ) 54/Z223.1- 46 - (4.1.2): Accept SUBMITTER: David Rock, City of Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Revise text as follows:

4.1.2 Tes t Medium. The test m e d i u m shall be air, n i t rogen, or carbon dioxide. OXYGEN SHALL NEVER BE USED.

=}=tc.."aa ~.pcm'dng at p r c : : u : ~ ~f0 .5 w.r,~':- (3A ~."D_ . . . . . . ~,_~,~,~ c.: .~_.'̂ --

6 5 9

NFPA 54 - - A99 R O P

SUBSTANTIATION: This exception covers all low-pressure gas piping systems that are a large portion of gas piping installations today. IFGS does not specify the test procedure with the ft~el gas in the pipe. COMMITTEE ACTION: Accept. COMMITTEE STATEMENT: Proposal 54/Z223.1-52 (Log #CP3) permits the use of fuel gas for the leak check. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow. Rhead, White

(Log #Alfi0) 54/Z223.1- 47 - (4.1.3(d)): Reject SUBMITYER: Martin P. Petchul, P.E., Columbia Gas RECOMMENDATION: Revise as follows:

(d) Where the piping system is connected to appliances, equipment, or equipment components designed for operating pressures of less than the test pressure, such appliances, equipment, or equipment components shall be isolated from tbe piping system byl

(1) disconnecting them and capping the outlet(s) or (2~ closing the individual equipment shutoff valve(sL These valves shall b¢ ~lesigned for operating 9ressures equal to or

erea~¢r than the test pressure. SUBSTANTIATION- The purpose for disconnecting the appliances or equipment from the piping system is to protect it and its components from the test pressure. Isolating the appliances, equipment and equipment components with a valve in the closed position that is designed for operating pressures equal to or greater than the test pressure accomplishes this in a practical and safe manner. This practice of pressure testing against a valve that is appropriately rated, has been practiced for a number of years without serious consequence. It is a practical field approach that is used by contractors on a daily basis. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The committee believes that testing the piping system with a closed valve can cause appliance damage ,and should not be permitted. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMrlq'EE ACTION:


(Log #NI 6) 54/Z223.1- 48 - (4.1.3(d)): Reject SUBMITI'ER: Lawrence L. Border, Columbia Gas of Ohio RECOMMENDATION: Add after 4.1.3(d)

"An alternate method to protect and isolate the equipment or appliance from the test pressure is to close the manual shutoff valve ahead of each appliance." SUBSTANTIATION: For many years my Company has only required that we close the manual shutoff valve ahead of an appliance when doing a 3# for 10 minute test of new piping. The overall experience from these many years proves this is adequate protection for the equipment or appliances. It's also adequate for higher pressures and longer test times. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposal does not contain a

eCific proposal to revise the Code. MBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24

VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, White

(Log #A38) 54/Z223.1- 49- (4.1.6): Accept SUBMITTER: James Anjam, Arlington County, VA RECOMMENDATION: Delete text as follows:

. . . . . . . . t " . . . . . . . ' . . . . . . . . .

tl:e F!p':~g 2)~,¢.~.. c2~fcrm tc "2=e Cc~e 2r ::':re Fre°~urc re=tea-.. SUBSTANTIATION: This section has been covered in IFGC Section 104.8. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: DOUCETTE: Not all of the States have adopted the International

Fuel Gas Code (IFGC). NFPA 54 is a code enforced by many states for the purpose of regulating gas piping and equipment. The IFGC is essentially a competitor of the NH~A 54 standard. This panel action infers that the requirements of the IFGC are part of NFPA. The action deletes the requirement to maintain test records.

(Log #A107) 54/Z223.1- 50- (4.1.6): Accept SUBMITTER: David Rock, City of Portland (Oregon Mechanical Officials Association)

I RECOMMENDATION: Delete text as follows: A..I.5 Tcz= P.ccsr~. ~ec.2r~ =ha!! bc m:.Sc vf ~hc inzpcct!on :n~

the p:~'=g ~;.~tcm co:'2o.."m to. "..~¢ Cc.~e or :;'c=c Frc=urc :c~tc3. SUBSTANTIATION: IFGC Section 104.8 specifies how records shall be made and retained. Section 4.1.6 is redundant and adds confusion. COMMITTEE ACTION: Accept. NUMBER OF COMMFFrEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: DOUCETTE: See my Explanation of Negative vote on Proposal

54-49 (Log #A38).

(Log #N29) 54/Z223.1- 51 - (4.2.1): Reject SUBMITTER: James H. Shanley, Jr., John A. Kennedy & Assoc. RECOMMENDATION: Revise text as foUows:

4.2.1 Before Turning Gas On. Before gas is introduced into a system of new gas piping, or back into an existin~ system after being shut off, includine the fillin¢ of storace cvhnders or tanks. the entire system shall be inspected.to determine that there are no open fittings or ends and that all manual valves at outlets on eqmpment are closed and all unused valves at outlets are closed and plugged or capped. SUBSTANTIATION: A loophole exists in the current language in that an LP gas supplier can fill the LP tanks following the requirements of NFPA 58 regarding storage tank inspection etc., but if the gas supply valve at the tank is left dosed none of the NFPA 54 requirements pertain. This is because the storage tanks and appurtenances are specifically excluded from the definition of "gas system." The result of this is that the gas system_downstream of the first stage regulator does not have to be checked and the supplier can leave without doing anything to ensure that the system is safe or even to communicate this potential hazard. The hazard exists when the gas supply valve is opened by a person who is unaware of the requirement to check the system or the potential for a gas leak from a system which has not been checked. This has happened and it has resulted in fires and explosions.

I have personal knowledge of an explosion in Iowa which killed two persons and severely injured a third and was the result of the opening of the gas supply valve prior to and without any type of gas system inspection O r test. The gas supplier filled the tanks at this building but did not check the system because he assumed the building owner would have someone else do it. In addition, the building had been subjected to a substantial flood further indicating the need for an inspection and test. The gas was turned on a few days later by an employee who knew nothing about having to check the system. A short time later the building was leveled by an explosion.

The only thing which stands between the gas supply and an untested system is the valve on the tank which can be opened by anyone. If there is gas available but the gas system cannot be checked, the gas supply valve should be locked closed, l have addressed this in a separate proposal for Part 1 of the Code. COMMITTEE ACTION: Reject. COMMrI~rEE STATEMENT: The National Fuel Gas Code has nothing to do with the filling cylinders. Coverage under the National Fuel Gas Code begins downstream of the second stage

ressure regulator. UMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24


660

N F P A 5 4 - - A 9 9 R O P

(Log #CP3) 54/Z223.1- 52 - (4.2.1): Accept SUBMITTER: National Fuel Gas Code Commi t t ee RECOMMENDATION: Add a new 4.2.1 to read:

4.2.1 Tes t Gases. Fuel gas shall be permi t ted to be used for leak checks in p ip ing systems that have been tested in accordance with Section 4.1.

R e n u m b e r the section. S U B S T A N T I A T I O N : This new paragraph is n e e d e d to clarify the commit tee ' s in ten t that fuel gas can be used for leak checks. COMMITTEE ACTION: Accept. NUMBER OF C O M M I T r E E MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITT E E ACTION:


(Log #N] 3) 54/Z223.1- 53 - (4.2.1 and 4.2.2): Accept in Principle SUBMITTER: J ean L. McDowell, McDowell Owens Engineer ing, Inc. RECOMMENDATION: Revise text as follows:

4.2.1 Delete phrase (, or back into an existing system after being shu t off).

4.2.2 After words, "Immediately after t u rn i ng on the gas, " add "to a system of new gas piping, or back into an existing system after be ing shu t off." S U B S T A N T I A T I O N : The Code shou ld require both visual check of all valves as well as a system pressure check at new and al tered p ip ing systems. For existing systems where the gas supply has been temporar i ly shu t off and no modif icat ion m a d e to the piping, a system pressure test shou ld suffice.

In normal opera t ions it is no t possible, when service is be ing restored (out-of-gas; new tenants , etc_), for the service pe r son to locate all u n u s e d valves or outlets. Frequent ly they are h idden in closets, u n d e r or beh ind furni ture , covered with personal be longings (clothes, etc.). Additionally, the serxace pe r son would no t ordinari ly have access to all rooms in a dwelling• COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: Refer to Commi t tee Action on 54/Z223.1-54 (Log #A94a). NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A94a/N69a) 54/Z223.1- 54 - (4.2.1 and 4.2.2): Accept in Principle SUBMrVrER: Bruce J. Swiecicki, National Propane Gas Associat ion RECOMMENDATION: 1. Revise 4.2.1 to read as follows:

4.2.1 Before T u r n i n g Gas On. Before gas in in t roduced into a system of new gas plpmg, or,bK . . . . . . . . . . . . : z z g z) : .em ~ . c r ~.-.~t'":~- . . . . . .t . . . . . ~,'x the entire system shall be inspected to de te rmine that there are no open f i tdngs or ends and tha t all manua l valves at outlets on e q u i p m e n t are closed and all u n u s e d valves at outlets are closed and p l u g g e d or capped.

2. Revise 4.2.2 to read as follows: 4.2.2* Test for leakage. Immediate ly after a newly installed tk~e

gas s ~ t e m i s t u rned on, the piping system shall be tested to ascertain tha t no gas is escaping. If leakage is indicated, the gas supply shall be shu t off until the necessary repairs have been made.

After an in te r run t ion of service occurs, a test for leakage shall be per formed. T h e ~as supply shall be t u rned off after t h e ] e a k test is comple ted and shall remain Off unti l any necessary, repair , have been made to the svstem if leakage exceeds 1250 BTU/Hr . . and the nilots are relighted. If the t'as service canno t be restored, the cus tomer shall be notified. S U B S T A N T I A T I O N : T he re is no specific language in NFPA 54, National Fuel Gas Code to address leakage tests after t empora ry in ter rupt ions of service. Section 4.2 def ines appropr ia te tests and inspect ions to per form for new piping installations, and is of ten referred to when cons ider ing in te r rupt ions of service on existing systems. The visual inspect ion r e q u i r e m e n t of 4.2.1, which states that "the entire system mus t be inspected to de te rmine that there are no open fittings or ends," places an u n d u e bu rden on the p ropane industry. Propane c o m p a n i e s mus t of ten fill empty tanks when the c o n s u m e r is no t at home , and therefore interior p iping canno t be inspected. The pracdce o f filling tanks when no one is home , or pe r fo rming o ther minor service which temporar i ly

in ter rupts the p ropane service, can be pe r fo rmed safely because the re are appropr ia te leakage tests which can be conduc ted f ro m the exterior of the h o m e to ensure tha t the p ropane system has no open fittings or ends, and tha t t he re is no t an unacceptable rate of leakage in the system.

This proposal would provide for a d i f ferent s t andard o f care for t empora ry in te r rupt ions of service on existing system~, as opposed to the cu r ren t r equ i rements for new piping systems. The s tandard would be changed in two areas for t emporary service interrupt ions:

1. El iminat ion o f the visual inspect ion r e q u i r e m e n t for t empora ry in ter rupt ions of service.

2. Allowing for an acceptable rate of leakage when pe r fo rming the system leak test. This would allow existing systems with small, non-hazardons rates o f leakage toe placed back into service. T h e reason such leakage would be pe rmi t t ed is to allow systems with manua l stove safety pilots, or o ther sources of small acceptable rates of leakage, to be con t inued in use.

This proposal would therefore pe rmi t an LP-gas delivery person to fill a cus tomer ' s tanks when the cus tomer is no t on the premises, pe r form a leakage test f rom the exterior of the home , and leave the system in an operable condi t ion if the system does not have an unacceptable rate o f leakage. These proposed changes are suppor t ed as follows: 1. The defini t ion of " In ter rupt ion of Service" is n e e d e d to establish a basis for in terpre t ing the p roposed Section 4.2.2. 2. The change to 4.2.1 removed systems in which the service has been in te r rup ted f rom the r equ i r emen t to recognize tha t LP-gas cus tomers may no t be on the premises when the conta iner is being filled; therefore, access to the system for inspect ion would no t be possible .

$. The change to 4.2.2 would pe rmi t the leak test to reveal "acceptable limits" to the a m o u n t of gas escaping f rom the system. Doing so would acknowledge tha t the system has open pilot l ight valves which pe rmi t gas to flow•

4. This change also recognizes the m e t h o d used by m a n y natural gas sightless when checking leakage by Clocking the me te r an d simply allows the LP-Gas indust ry to utilize a device tha t accurately measures flow in the same m a n n e r tha t the natura l gas indust ry uses the cus tomer meter• The LP-g-as device is eu r rendy available and has been proven by leakage tests conduc ted at over 34,000 sites•

5. The leakage rate of 1250 b t u / h r was de t e rmined based on the

~ ractice of some natural gas utilities of permi t t ing up to 1 c u f t per our leakage rate.

COMMIq['I'EE ACTION: Accept in Principle• 4.2.1 Before T u r n i n g Gas On. Before gas in in t roduced into a system of new gas piping, cr ~ :zk ~=tc. -_~ c".2:'-~g :TZtZm ~ t c r ~.̂ :__~, . . . . . . . .~ . . . . ~x, the entire system shall be inspected to de te rmine tha t the re are no open fittings or ends and that all man u a l valves at outlets on e q u i p m e n t are closed a n d all u n u s e d valves at outlets are closed and p lugged or capped.

4.2.2.* Tes t for leakage. Immediate ly after the gas is tu rned on, the piping system shall be tested to ascertain tha t no gas is escaping beyond normal nilot flow. If Ic~'~gc excessive flow is i n~z= :c~ found , the gas supply shall be shu t off until the necessary repairs have been made. For LP gas piping systems, the eas tank service valve shall be t u rned off until the oilots are relighted, COMMITTEE STATEMENT: The proposal revised with editorial addi t ions. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I I T E E ACTION:

AFFIRMATIVE: 19 NEGATIVE: 2 N O T RETURNED: 3 Bigelow, Rhead , Whi te

EXPLANATION O F NEGATIVE: PAKRUDA: The NFPA 54 is a code book and a ANSI s tandard , I

believe tha t au thor iz ing an acceptable gas leak of 1250 btu 's per hou r shou ld be addressed in the p roper s t andard and n o t in the National Fuel Gas Code. We mus t take into considerat ion such things as vacation homes , residences and o ther bui ldings tha t may become temporar i ly unoccup ied for one reason or another . A leakage rate o f 1250 btu 's per h o u r could potent ional ly release approximate ly 30,000 btu's o f LP-gas in a 24 h o u r period. For discussion sake only, what if a res idence or o ther bui ld ing becomes vacant for two weeks, when would the 1250 btu's per hour reach f lammabil i ty limits. I am no t aware of any test being done to make this de te rmina t ion . W h e n all LP-gas appl iances have electronic ignit ions and are installed in a house or o ther type building, does the p roposed new wording m e a n tha t the re would be on acceptable leakage allowed? Is the proposal to have an acceptable leak conflict with Proposal 54-56 (Log #13) paragraph 5.1.8 page 54 of the Report on Proposals? In my op in ion an d in

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the interest of safety, LP-gas systems should be gas fight with no leaks authorized. As you are aware, a house of new construction is extremely tight therefore, I feel that this requirement would be difficult to enforce. PETRU: The words "beyond normal pilot flow" and "excessive flow" are ~ague and unenforceable. Would the proposed requirement apply to an installation having only electronic ignition appliances?

(Log #A85) 54/Z223.1- 55 - (Figure 5 (New)): Accept in Principle SUBMITIER: James A. Ranfone, American Gas Association RECOMMENDATION: Add a new single combustion opening Figure 5 as follows.

Chimney or gas vent

~ ~ e r

Figure 5

Figure 5. Equipmimt Located in Confined Space; All Air from Outside the Building. See 5-3.3(b)2. SUBSTANTIATION: To add a new Figure showing the single high mounted outdoor combustion air opening. COMMITTEE ACTION: Accept in Principle.

i Modify the proposed Figure 5 to include another option of attic combustion air opening. Change the existing text of'5-3.3(b)2 to read as follows:

2. One permanent opening, commencing within 12 in. (30 cm) of the top of the enclosure, shall be permitted where the equipment has clearances of ~it least 1 in. (2.5 cm) from the sides and back and 6 in. (16 cm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to t h e outdoors or spaces (crawl or attic) that freely communicate with the outdoors (See Figure 5), and shall have a minimum free area of: COMMITTEE STATEMENT: The modified feature will correspond with Section 5-3.3(b)2 which allows fresh air from the outdoors or the attic to be introduced. Paul Cabot will provide this modified Figure to the Committee for further consideration. The text was added to refer to the Figure in the section. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP13) 54/Z223.1- 56- (5.1.8): Accept SUBMITTER: National Fuel Gas Code Committee RECOMMENDATION: Modif T the existing 5.1.8 to read as follows:

5.1.8 Flammable Vapors. Gas appliances shall not be installed in areas where the open use, handling or dispensing of flammable liquids occurs, unless the design, operation, or installation reduce the potential of ignition of the flammable vapors.

Gas utilization equipmerit installed in compliance with 5.1.9, 5.1.10, or 5.1.11 shall be considered to comply with the intent of this provision. SUBSTANTIATION: The paragraph is revised to clarify that a major source of flammable vapors is.flammable liquids. The phrase "likely to be" was removed became it contained unenforceable language. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A151) 54/Z223.1- 57- (5.1.9): Accept in Principle SUBMITTER: James A. Ranfone, American Gas Association RECOMMENDATION: Revise section 5.1.9 as follows:

5,1.9 Installation in Residential Garages. (a) Gas utilization equipment which has a flame, generates a

spark or uses a glowing ignition source open to the space in residential garages shall I~e installed so that all burners and burner ignition devices are located not less than 18 in. (46 cm) above the floor.

(b) When appliances installed in a senarate, approved comoartment having access only form outside of the gm--4ge, ~uch equipment may be installed at floor level, providing the required combustion air is taken from and discharged to the exterior or the f f " d 2 f ' d ~ e . v v

~l~x-L~ Such equipment shall be located or protected so it is not subject to physical damage by a moving vehicle. SUBSTANTIATION= The proposal clarifies the type of equipment that should be elevated in a garage. The proposal also would permit an alternative approach to install gas equipment in garages when .enclosed in a separate, approved compartment and all combustion air is taken from outside of the garage. Similar provisions are found in the Uniform Mechanical Code adopted in many western states. COMMITTEE ACTION: Accept in Principle. Modify the proposed text to read as follows:

5.1.9 Installation in Residential Garages. (a) Gas utilization equipment in residential garages sJlall be

installed so that all burners and burner ignition devices are located not less than 18 in. (46 cm) above the floor.

(b) Such equipment shall be located or protected so it is not subject to physical damage by a moving vehicle.

(c) When appliances are installed in a s~parate, enclosed space having access only from outside of the garage, such equipment may be installed at floor level, providing the required combustion air is taken from the exterior of the/garage. COMMITTEE STATEMENT: The Committee believes the submitter's intent was met. The proposed "approved compartment" was chanl~,ed to "enclosed space" since the term "approved compartment ' was unclear. In the proposed (a), the phrase "open to the space" was removed since it was not definable; the rest of the proposed text was also removed since it modified "open to the space". In addition, editorial changes were made. The original proposed text from the Uniform Mechanical Code was modified, therefore, no copyright permission is needed. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A84) 54/Z223.1- 58- (5.2.2): Accept SUBMITTER: James A. Ranfone, American Gas Association RECOMMENDATION: Revise section 5.2.2 as follows:

5.2.2. Clearance to Combustible Materials. Gas utilization equipment and their vent connectors shall be installed with clearances from combustible material so their operation will not create a hazard to persons or property.

Minimum clearances between combustible walls and the back and sides of various conventional types of equipment and their vent connectors are specified in Part 6 and Part 7. (Reference can also be made to Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, NFPA 211.) Equipment ~ha!! ::c.t

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;.q3+..32!atiO.q. v ~, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2.3 Installation on Carpet ing. E q u i p m e n t shall no t be installed on carnetin~, unless the e q u i p m e n t is listed for such installation. SUBS'PAN'/~IATION: The existing coverage for e q u i p m e n t installation on carpe t ing is placed in its own sect ion for improved clarity. COMMITTEE ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE T() VOTE: 24 VOTE ON C O M M I T T E E ACTION:


Log #A97) 54/Z223.1- 59 - (5.3 (New)): Reject SUBMITTER: Evan C. Brown, Arkansas Energy Office - Consu l t an t RECOMMENDATION: Add new text as follows: (secretary note: code location not specified)

"l[f a combus t ion fu rnace is located anywhere in the house the door to the ful'~l~,cg needs t9 be carefully weather-str ioned. This will isolate the fu rnace f rom the house and orevent condi t ioned air f rom be ing drawn into the furnace closet. SUBSTAI~TIATION: W h e n a combus t ion fu rnace is located in a closet that opens to a condi t ioned space, the negative pressure created by the combus t ion process causes some condi t ioned air to be pul led t h rough leaks in the door. T he furnace shou ld be isolated f rom the living space by carefully sealing a n d weather- stripiping this door to prevent the m o v e m e n t o f condi t ioned air to feed the combust ion .

The re is also a possibility tha t back draf t ing mi gh t occur when exhaus t gases are pul led into the h o m e t h rough the leaky furnace door instead of going up the stack, ff the fu rnace is on and, s imultaneously, the house is pu t u n d e r a small a m o u n t of negative pressure by exhaus t fans, drier vents and closed inter ior doors, back draf t ing can occur. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: This proposal el iminates the use of combus t ion air f rom adjo in ing spaces, as is currently, permi t ted by the Code. The p roposed change is energy conservanon related, and therefore is beyond the scope of the commit tee . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A21) 54/Z223.1- 60 - (5.3.1 t h rough 5.3.6, Figure 1 and Table VI Notes): Accept in Principle in Part SUBMITTER: J u d Collins, O k l a h o m a State Heal th Dept. Occupa t iona l RECOMMENDATION: Revise text to read as follows:

5.3.1 General. (a) The provisions of Section 304.1 shall apply to gas utilization

e q u i p m e n t installed in b u i l d i n ~ and that require air for combust ion , ventilation, and dilut ion of flue gases f rom v-+,.h'= +~c

Except ion No. h Direct vent e q u i p m e n t tha t is cons t ruc ted and installed so tha t all air for combus t ion is obta ined directly f rom the c u ~ ! J e aL'n.~:phere .gutdoors and all flue gases are d ischarged .to the . . . . . :.a^ ~+ . . . . ~ . ^ s . . . . . . . . . . . . . r . . . . . ou tdoor .

Exception No. 2: Enclosed furnaces that incorporate an integral total enclosure and use only c.u~z:.gm ou tdoor air for combus t ion and di lut ion of flue gases.

(b) E q u i p m e n t shall be located so as no t to interfere with proper circulation of combust ion , ventilation, and di lut ion air. Where normal infiltration does no t provide the necessary air, outside air shall be in t roduced.

x ~ / * * . . . . . + * * . . . . . " ' ' ' ~ + ~ ~ . . . . . . . ~ + 0 + ' + ' * ' I - ' " . . . . . . . . . . . . . .

- ~ - - + . + 1 1 " * ¢ . + A . . . . . . 1 ~ + k ^ ~ + : + - - . l + g . . . . . : J + + : ~ - - . . . . . . . . . . . _. , . . . . . . ~.,+' . . . . . . . . . . v . . . . . . +.^, ~%u~.+.~,Z-:-.J++L~T..y~_~.+, d ! ! u f c : , +z£ct) . . . . . . . . . . , . . . . . . . . . . . , . . . . . . . . . . . . . . . . L " . . . . . . .

. . . . . I : ~ A f . . . . . . + + ' I ~ + 3 ~ : ~ + I . . A : ~ + + 1 1 ~ l . . . . . . : + + A g" . . . . . g ' ^ + . + . A + + 1 ~ 1 " . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . ~ . . . . . . . " 1 . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . v . ~ v . . . . ~.....~,":-+ c~nd!t!~n~ fc.r pcmc-:=ct. (e) A Draft hoods e r a and barometr ic draft regulators shall be

installed in the same room or enclosure as the e q u i p m e n t ~a :uch a m a a : e r so as to prevent a n y d ' f f f e r e n c e in pressure between the hood or regulator and the combus t ion air supply.

(f) Air for combust ion , venti lat ion, a n d di lu t ion of flue gases for gas utilization e q u i p m e n t ven ted by natural draft shall be obta ined by appl icat ion o f one of the m e t h o d s covered in ~ection 304.3, 304.4. 304.5 or 304.6.

( g , - . . . . "1 . . . . . . . . . . . . . . . . . . r . . . . . . . . . . . . . . . . . . . . . . . .

+ ~ + k o . + + : + + ~ : . . . . . . : . . . . . + .

Provisions shall be m a d e to allow for the s imul taneous opera t ion 9f mechanica l exl]+ust s~ t ems , f ireplaces or o ther e q u i p m e n t an d appl iances oneraf in+ in the same room or snace f rom which combus t ion a n d di lut ion air is be ing drawn-

5.3.2 E q u i p m e n t Located in U~+cc:fi=cd Spacz: Unusual ly Tight . Const ruc t ion . E q u i p m e n t located in bui ldings of unusual ly t ight cons t ruc t ion (see defini t ion)~ "~. Scc'A~a 202 c.f !FCC) shall be provided with air for combus t ion , ventilation, and di lut ion o f flue gases us ing in a cco rdance with one of the m e t h o d s descr ibed in Section 30~.3.2, 304.4, ~ 304.5. or $04.6.

(a) All Air From Inside the Building. The conf ined space shall be provided with two p e r m a n e n t open ings c o m m u n i c a t i n g directly

• + I ~ . - ~ - ~ I . ~ 1 + : ^ - - - I . . . . I - X v~ . . . . . . . . . . . . . . . . . . . w, o ther spaces of su f f ioen t vo lume so that the combined volume of all s u c h spaces meets the criteria for an u n c o n f i n e d space. The total i npu t of all gas util ization e q u i p m e n t installed in tl3e combin.ed spaces shall be cc~z '~crc~ in mr.2:::g . . . . . . . c . . . . . . . . . . . . u sed tO de te rmine th¢ l-equire~ m i n i m u m vo lume . Each open ing shall have a m:.r.'m=:., free area

of no t less than of I sq in per 1,000 Ere" pc r ~ . u r B t u / h (22 cm 2 per kW) of the total i npu t rat ing of all gas util ization e q u i p m e n t in

the conf ined space, bu t no t less t han 100 sq in. (645 cm2) . O n e open ing shall c o m m e n c e within 12 in. (30 cm) of the top, an d one open ing shall c o m m e n c e within 12 in. (30 cm) of the bot tom, of the enclosure (see Figure 304.3.1). The m ~ ' m u m least d imens ion of air open ings shall be no t less than 3 in. (8 cm) .

Figure 1 Equ ipmen t Located in Conf ined Spaces: All Air f rom Inside the Building. See Sectioq 304.+3-.t-.

(b) All Air From Outdoors . The conf ined space shall commun ica t e with the outdoors in accordance with m e th o d s 1 or 2. The rn. 'n!mum least d imens ion of air open ings shall no t be less than $ in. ( c m ) . Where ducts are used, they shall be of the same cross-sectional area as the free area o f the open ings to which they connect .

1. Two p e r m a n e n t openings , one c o m m e n t i n g within 12 in. (30 cm) of the top, and one c o m m e n c i n g within 12 in. (30 cm) of the bot tom, o f the enc losure shall be provided. The open ings shall c o m m u n i c a t e directly, or by ducts, with the ou tdoors or spaces (crow! ~.r ='+2c) tha t freely c o m m u n i c a t e with the outdoors.

a= Where directly c o m m u n i c a t i n g with the outdoors , or where commun ica t i ng to the ou tdoors t h r o u g h vertical ducts, each open ing shall have a m~=:.m=m free a rea of no t less than 1 sq in.

per 4,000 Btu pe r h o u r (5.5 cm 2 per kW) of total i npu t rat ing of all e q u i p m e n t in the enclosure . (See Figures ++0~..++.2(=) =:=5 ~9~.~.2(~) 304.4(1~ a n d 304.4~2L)

Jar. Where c o m m u n i c a t i n g with the outdoors t h ro u g h horizontal ducts, each open ing shall have a m la [mz :m free area o f

no t less than 1 sq in. per 2,000 Btu per hou r (11 cm 2 per kV0 of total i npu t rat ing of all e q u i p m e n t in the enclosure. (See Figure g- A Q O I ~ X . . ~ . , , ~ , 3 0 4 . 4 t 3 ) . )

TEXT FOR 5.3.3(b)2 DIFFERS FROM TEXT IN B O O K 2. O a c pcrmamc=t cFc~2r.g, c~.r..mc=c'~:g : ' - '&'n 12 "m (39 ~.-Tn)

_c+t. . . . . . c ++. . . . . ~ . . . . . . : h ~ l . . . . . . . v . . . . . . . . . . . . . . . . h : per. '~-ttzd T~e o n en in g c o m m e n c i n ~ within 12 in. of the bo t tom of the e n c l o s u r e shall n o t be reau i red where the e q u i p m e n t has clearances of e~]east- n o t less than 1 in. (2.5 cm) f rom the sides and back and 6 in. (16 cm) f rom the f ront ^~ +' . . . . . u .... and the open ing c o m m e n c i n g within 12 in. of the too of the enclosure complies with all of the following:

1. The open ing shall directly commun ica t e with the outdoors . . . . . . . . . . . . . . , + . + + . . . . . . . . . ~ . . a . . . . . . . . . . . . . . . . . . . ~ . . . . .

.... "~^+- or spaces (crawl or attic) tha t freely c o m m u n i c a t e with the outdoors , ~ . ~ :h=l! h w : e z m:.~m'-'.~., free ~-ez cf : 'o r shall c o m m u n i c a t e with the ou tdoors t h r o u g h vertical or horizontal ducts.

a. The reuuire onen ing shall have a free area of n o t less than 1

oSC~ in. per 3,000 Btu per h r (7 cm 2 per kW) of the total i npu t rat ing all e q u i p m e n t located in the enc losurer and ,

6 6 3

N F P A 5 4 - - A 9 9 R O P

b. T h e reoui red onen i nv shall have a free area of no t less than the s u m . o f the areas of all vent connec tors in the conf ined space.

5.$.4(New) Combina t ion of air f rom inside and f rom outdoors . Where the bui lding in which the fucl ~ u r n ' ~ g appl iances are located is no t unusua l ly t ight cons t ruc t ion and the c o m m u n i c a t i n g interior spaces conta in ing the ~ : ' b : : m ' n g appl iances comply with all of the requ i rements of Section $04.-g-A-, except the volumetr ic r equ i r emen t o f Section 304,&t-, requi red combus t ion and di lut ion air shall be obta ined by open i ng the r o o m to the ou tdoors ~ti l izing a combina t ion of inside a n d ou tdoor air p rora ted in accordance with Section ~A..a..6 304.5.6. Open i ngs connec t ing the inter ior spaces shall comply with Sections 304.3.1. T h e ratio of inter ior spaces shall comply with Section $9~.A.5 $04.5.5. T h e n u m b e r , location and cados of open ings connec t ing the space with the ou tdoor air shall comply with Sections ~0~.~.! 304.5.1 t h rough ~O~.A. ~. ~04.5.4.

5.3.4 Specially Engineered Installations. The r cqu! rcmea t : ~f

adequa te supply o f air for combus t ion , ventilation, and di lut ion of flue gases shall be oermi t ted to be provided by an approved eng ineered system.

5~3.5 Louvers and Grilles. In cz!c'.:k~.~ng flee ~ e z !n ~ga~.~, g : ~ c c . . . . ¢ , . . . . . . . c o ~ ! d c r a t ! . ~ ~.l;:!! .%c yen t~. t!:e 5l.vck!~g . . . . . . . . . . . . . . . .

gallic:, "" " ~.r ~crcznz, ~r~.:cct:ng v~enmg: . The r eau i red size of o p e n i n ~ for combust ion , ventilation and di lut ion air shall be b~sed on the ne t free area of each o , e n i n g . If the free area t h rough a design of louver or grille is known, it shall be used in calculating the size open ing requi red to provide the free area specified. If the design a n d free area are no t known, it shall be a s sumed that wood louvers will have 20-25 pe rcen t free area and metal louvers and grilles will have 60-75 percen t free area. Louvers and grilles shall be f ixed in the open posit ion or shall be interlocked with the e q u i p m e n t to prevent operat ion of d*e e q u i p m e n t when any of the dampe r s are closed. ~c. L~=t fl~e)" arc

5.~.6(New) Combus t ion air ducts. C o m b u s t m n atr duc ts shall . . . . I . . . . . : + 1 ~ / 1 \ +1 . . . . . . I ~ I K X

1. Be of galvanized steel complying with Chapter 6 of the IMC or of equivalent corrosion-resistant material approved for this appl icat ion.

Exception: Within dwellings units, unobs t ruc ted s tud and jo is t spaces shall no t be prohib i ted f rom conveying combus t ion air, provided tha t no t more than one requi red fireblock is removed.

2. Te rmina t e in ,an unobs t ruc ted space allowing free m o v e m e n t of combus t ion air to the appl iances.

3. Serve a single enclosure. 4. Not serve bo th uppe r a n d lower combus t ion air open ings

where both such open ings are used. T he separat ion between ducts serving u p p e r and lower combus t ion air open ings shall be ma in t a ined to t he source of combus t ion ,air.

5. Not be sc reened where t e rmina t ing in an attic space. 6. Not, slope downward toward d~e source o f combus t ion air.

where servinu the t inder reoui red combus t ion air ooening . NOTES APPLIC~,BLE T O TABLE V1 + 1. Reduct ion of clearances f rom combust ib le materials shall no t

in terfere wifl~ combus t ion air, draft h o o d clearance find relief, and access!Si!!t)" c f for servicing.

2. All clearances shall be measu red f rom dae outer surface of the combust ible material to the neares t po in t on the surface o f the appliance, d is regarding any in te rvening protect ion applied to the combus t ib le material .

3. Spacers and ties shall be of noncombus t ib l e material . Spacers ,and ~ ties shall no t be used directly opposi te an appl iance or connector .

4. Wbere all-a clearance reduct ion systems uz~ng utilizes a ventilated air space, adequa te provision for air circulation shall be provided as described. (See Figures 508.2(b) and $08.2(c).)

5 . "r~ . . . . . | ' ~ " ~'~ " " ~ . . . . ~ ::-=. (2.5 . ~ x For c learance reduct ion . . . . . . . . . . . . . . . . . . . . . . . . . . . /

systems uz~zg ventilated air space, the m i n i m u m clearance between clearance reduct ion systems and ~ combust ib le material

be ing protected shall be 1 in. (2.5 cm) ;vallz a.q_. a cc!!!ng;. a t~" a ' " - " Frotecter :: m e u ~ t e ~ . . . . . :~_, . ~ . , . .~ , . . . . . . c.^

com~r~, adcquatc ~.!r z-2rc'.:!~.g~.n zt~.:' ~c p¢.-:-_.'ttcg w. ~c ~r~.--g.~ by Ich-~.zg c~.! 7 t k : ~.~ttc.m =nd t~. p edge : ~.r .vn! 7 fl~c z!dc and top

~ .6 , Mineral wood harts (b lanket or board) shall have a m i n i m u m densi ty of 8 lb per cu ft (128 kg per m) and a m i n i m u m mel t ing poin t of 1500°F (816°C).

8,.7. Insulat ion material u sed as par t of clearance reduct ion

~y s t em shall have a thermal conductivity of 1.0 Btu in. per sq ft per r-°F (0.144 watts pe r meter-kelvin) or less.

~2h &Y'K~Z:2Z~ .................................. vv" ..... . . . . . . I" .........

8. In no case shall the c learance between the appl iance an d the combust ib le surface be r educed below tha t allowed in Table 308.2.

-1~. 9. All c learances a n d th ickness ' are m i n i m u m ; 'm'gc:

~b-BS¥~¥iAl:iON~-'~rZe'majority of the proposed modifications are editorial in na ture a n d are in t ended to clarify intent , en h an ce readability, p romo te un i fo rm interpreta t ion, el iminate, redundanc ies , e l iminate unnecessa ry c o m m e n t a r y text an d make the text style a n d format consis tent with o ther ICC Codes.

The p roposed modif icat ions tha t are no t editorial in na ture are addressed as follows in the order in which they appear in the text.

1. The third and four th paragraphs o f Section 304.1 are deleted because they address subject mat te r no t within the scope of the code or s tandard .

2. Section 304.7, I tem #6 is the result of IMC Code change activity.

3. Section 304.6 is modif ied to clarify tha t an interlock requires p roof of d a m p e r open ing as opposed to s imple parallel operat ion.

4. Notes to Table 3 0 8 . 2 . Note #6 and 11 are no t requi rements , are only commen ta ry and are unnecessary a n d inappropr ia te code text. COMMITTEE ACTION: Accept in Principle in Part. Revise text to read as follows:

5.3.1 General. (a) The provisions of Section 5.3 shall apply to gas utilization

e q u i p m e n t installed in bui ld ings ~ . ~ tha t require air for combust ion , ventilation, and di lut ion of flue gases fr~.m "~;':h'~n +At

~ o n No. 1: Direct vent e q u i p m e n t tha t is cons t ruc ted and installed so that all air for combus t ion is ob ta ined directly f rom the *ut=~de aumozFhcrc ou tdogrs and all flue gases are d ischarged to the : .u~!dc a'~-nv~pher¢ ou tdoors .

Except ion No. 2: Enclosed furnaces tha t incorporate an integral total enclosure and use only ou~'~"d: ou tdo9r air for combus t ion and dilut ion of flue gases.

(b) E q u i p m e n t shall be located so as n o t to interfere with p rope r circulation of combust ion , ventilation, a n d di lut ion air. Where normal infiltration does no t provide the necessary air, e u t d c c r outs ide air shall be in t roduced .

(c), (d) U n c h a n g e d (e) A Draft hood or a barometr ic draft regulator shale be

installed in the same room or enclosure as the e q u i p m e n t served !n =uch = ma=:ncr so as to prevent any difference in pressure between the hood or regulator and the combus t ion air supply.

(f), (g) U n c h a n g e d 5.3.2* E q u i p m e n t L o c a t e d in U n c o n f i n e d Spaces. E q u i p m e n t located in bui ldings of unusual ly t ight const ruct ion (see Section 1.7, Definit ions) shall be provided with air for combust ion , ventilation, a n d di lut ion of flue gases us ing the me thods descr ibed in 5. 3. 3(-I~)- 5.3.4 or 5.3.5.

5.3.3 Equ ipmen t Located in Conf ined Spaces, Unconf ined Spaces.

(a) All Air From Inside the Building. The conf ined space shall be provided with two p e r m a n e n t open ings commun ica t i n g directly with : n : ~ : f i e n : ~ r~.":'-(=) o ther sp~ces of sufficient volume so timt the combined vo lume of all such spaces meets the criteria for an u n c o n f i n e d space. The total inpu t of all gas utilization e q u i p m e n t installed in the combined spaces shall be c o n f e r r e d :.n mre~'ng tthi: dctcrm!nat!.~n used to de t e rmine the requirecl m i n i m u m vo lume . Each open ing shall have a m i n i m u m free area

of no t less than of 1 sq in per 1,000 Btu pe r t ~ hou r ( 2 2 cm 2 per kW) of the total i npu t rat ing of all gas utilization e q u i p m e n t in the

conf ined space, bu t no t less t han 100 sq in. (645 cm2). O n e open ing shall c o m m e n c e within 12 in. (30 cm) of the top, and one open ing shall c o m m e n c e within 12 in. ($0 cm) of the bot tom, of the enc losure (see Figure 1). T h e m i n i m u m d imens ion of air open ings shall be not less than 3 in. (8 cm). (b) U n c h a n g e d

1. Unchanged . a. U n c h a n g e d b. Where c o m m u n i c a t i n g with the ou tdoors t h rough horizontal

ducts , each open ing shall have a m i n i m u m free area of n o t less

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than 1 sq in. per 2000 Btu per h r (11 cm2 per kW) of total inpu t rat ing of all e q u i p m e n t in the enclosure. (See Figure 4.) 2. O n e p e r m a n e n t opening, c o m m e n c i n g within 12 in. (30 cm) of the top of the enclosure, shall be p e r m i t t e d where the e q u i p m e n t has clearances of at least 1 in. ( 2 . 5cm) f rom the sides and hack and 6 in. (16 era) f rom the f ront of the appliance. T h e open ing shall directly c o m m u n i c a t e with the ou tdoors or shall communica t e t h r o u g h a vertical or horizontal duc t to the ou tdoors or spaces (crawl or attic) tha t freely c o m m u n i c a t e with the outdoors (See fit, u r e 5). and shall have a m i n i m u m free area of:

a, b. U n c h a n g e d 5.3.4 U n c h a n g e d

5.3.5 Louvers and Grilles. In calculating free area in 5.3.3, g" , . . . . . . . co~!~cradc.~. :!:.~.!! . . . . . . . k~ -'co tc Uh.c b!cc!qng ~ ^ ~ * c f . . . . . . . .

gr:.!!e=, or :c reen: , p rc tec t ' ng cpen !ng : the reuui red size of oDenin~s for combus t ion , ventilation and di lut ion air shall be based 0~1 the ne t free area of each onen i ng . S,~recn: . . :~a :k,2! n e t 13c :mz.!!er "2w~ ! / 4 "~:. (5.S ram) m..-c:!:. If the f lee area t h rough a design of louver or grille is known, it shall be used in calculating the size open ing requi red to provide the free area specified, ff the design a n d free area are no t known, it shall be a s sumed tha t wood louvers will have 20-25 pe rcen t free area and metal louvers and grilles will have 60-75 pe rcen t free area. Louvers and grilles shall be f ixed in the open position. Exception: U n c h a n g e d

5.3.6(New1 Combus t ion air ducts. Combus t ion air duc ts shall comply with (1) t h r o u g h (6).;

1. Be of ~alvanized steel or an eauivalent corrosion-resistant material .

Excepti9n; Withitl dwellint, s units, unobs t ruc ted s¢tld andjois~; spaces shall no t be nrohib i ted f rom conveying combus t ion air. orovided tha t no t more than one reuui red fireblock is removed.

2. Te rmina t e in aft unobs t ruc ted soace allowing free movemeo~ of combus t ion air ¢9 the appl iances.

3. Serve a single enclosure. 4. Not serve both UDDer and lower combus t ion air onen ings

where both such open ings are used. T he senara t ion between ducts serving unDer and lower combus t ion air onen ings shall be main ta ined to the source of combus t ion air.

5. Not be sc reened where t e rmina t ing in an attic snace. 6. Horizontal Ut)Der combus t ion air duc ts shall n9 t sloDe

downward toward the source of combus t ion air. COMMITTEE STATEMENT: Parts of the proposal are accepted with editorial changes . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:


COMMENT ON AFFIRMATIVE: BURNSIDE: The text provided in the Let ter Ballot is no t what

was voted on at the commit tee meet ing. The re appears to have been a mix-up on which version of the text was used. We voted on the yellow text incon'ectly identif ied as being provided by the Vent ing Panel.

(Log #A86) 54/Z223.1- 61 - (5.3.4 (New)): Accept in Principle SUBMITTER: J am es A. Ran(one , Amer i can Gas Associat ion RECOMMENDATION: Add new sect ion as follows:

5.3.4 Combina t ion of air f rom the inside and f rom the outdoors . Where the buildin~ in which the fi~el-burninu ant)liances are located is no t unusual ly t ight constructi01:l al'ld the ¢olxlmunic~fing interior ~paces cotl taining th~ f l lel-burning appl iances comply with all of the r eau i r emen t s of Section 5.3.5(a). excent the volumetric r e o u i r e m e n t of Section 5.3.3(a/. reoui red combus t ion and dilutiorl air shall be obta ined bv onen i ng the room tO the outdoors utilizing a combina t ion of inside and ou tdoor air prora ted in accordaoce with Suction 5.3.4(fL Onenin t , s connecl~il2g the interior snaces shall comt)lv with Sections 5.3.3(aL T he ratio of interior snaces shall comply with Section 5.3.4(eL T he numb(l- , location and ratios of onen ings connec t in~ the snaee with the ou tdoor air shall comply witffSect ions 5.3.4(a) t-hrol)gh 5.3.4(~1),

(al N u m b e r and location of ot)enintrs. At least tw 9 9pen ings shall be orovided, one within 1 ft ( S 0 5 m m / of the ceiling of the room and one within 1 ft (305 m m / of the floor.

(b) Ratio of direct ooenin~s. Where direct onen ings to the outdoQr ~ are provided in accordance with Section ~i.3.3(b~

met, hod la. the ratio of direct open ings shall be the su m of the ne t free areas of both direct onenin~s to the outdoors , divided bv the s u m of the reoui red areas for both such onen in~s as d e t e r m i n e d in ~ ;co rdance witla Section 5.S.S(b) m e t h o d - l a . -

fc) Ratio of horizontal ooeninms. Where onenin t , s connec ted to the ou tdoors t h rough hor izonta i duc t s are orovided in accordance with Section 5.3.3fbl m e t h o d lb . the ratio o f horizontal onen ings hall be the s u m of the n e t free areas of bo th such o n e n i n ~ . divided by the s u m of t he r eau i r ed areas for bo th such onenin t , s as d e t e r m i n e d in accordance with Section 5.3.S¢bL methoci lb.

(d/ Ratio of vertical ooenines . Where ooeniiags connec ted to the ou tdoors t h r o u g h vertical ducts are nrovided in accordance with Section 5.3.S(bL m e t h o d la. t he ratio o f vertical ooenint , s shall be tile sum of the ne t free areas of bo th such openin_~s, divided by the sum of the r ( au i r ed areas for botl'l ~gch openipgs as d e t e r m i n e d in ~¢gordance with Section 5.5.S(bl. m e t h o d la_

(el Ratio Ot~ inter ior st)aces. T h e ratio of inter ior snaces shall be the available vo lume of-all c o m m u n i c a t i n g snaces, divided bv the reuui red vo lume as de t e rmined in accordance with Section 5.3.3(a/ .

(t3 Prorat ing of inside and ou tdoor air. In snaces tha t utilize a combina t ion o f inside a n d outdoor air. the sum of the ratios of all direct o n e n i n ~ , horizontal o n e n i n ~ , vertical onen ings m3d~___ inter ior snaces shall euual or-excee¢t 1. S U B S T A N T I A T I O N : -To pe rmi t the use of a combina t ion of indoor and ou tdoor combus t ion air openings . The p roposed language is taken f rom Section 304.4 of the Internat ional Fuel Gas Code (at tached) . T h e combina t ion o f i ndoor and ou tdoor combus t ion air has been permi t ted for m a n y years by the Uni form Mechanical Code, as publ i shed by ICBO, which is adop ted by mos t western States. COMMITTEE ACTION: Accept in Principle. Change the word "inside" to "indoor" t h r o u g h o u t the p roposed text. In proposed (c), change the word "hall" to "shall" and r e n u m b e r accordingly (a new 5.3.$(c)). COMMITTEE STATEMENT: The changes were editorial in nature, and did no t change the Submit ter ' s intent. However, the Submit ter ' s i n fo rmed the Panel that the language was f rom the Internat ional Fuel Gas Code, no t f rom the UMC as stated in the substant ia t ion. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead , Whi te

(Log #A101) 54/Z223.1- 62 - (5.3.5 Exception): Reject S U B M I T T E ~ Clifford L. Hoyme, HOYME Manufac tu r ing Inc. RECOMMENDATION: Revise Except ion as follows:

Exception: Louvers inter locked with the e q u i p m e n t so they are proven in the full open posit ion p r io r to ma in bu rne r ignit ion and du r ing main bu rne r operat ion. Means shall be provided to prevent the main bu rne r fo rm igni t ing should the louver fail to open du r ing bu rne r s tar tup and to shu t down the ma in b u rn e r if the louvers close du r ing bu rne r operat ion. W h e n field installed. in ter locking l o u v e r s / d a m n e r s shall be approved. SUBSTAN~'IATION: As per Section 5.1.1 "Gas appliances, accessories, and gas utilization e q u i p m e n t shall be approved." It is therefore p r u d e n t to require any device connec ted or inter locked to an approved device, be also approved.

Approval S tandards are in place such as the "AGA Requ i r emen t s for Electrically Opera ted Automat ic Combus t ion an d Venti lat ion Air Control Devices for Use With Gas-fired Appliance. No. 1-88, February 22, 1988."

Products are on tile market such as listed in the July 1997 IAS Directory page 1202. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The phrase "when field installed" is unnecessary s ince all are field installed. The cur ren t text is adequate and the proposed text lends itself to non-un i fo rm interpre ta t ions by di f ferent author i t ies having jur isdict ion. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


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(Log #A102) 54/Z223.1- 6 3 - (5-3.5 Exception): Reject S U B M I T T E R : Clifford L. Hoyme, HOYMli Manufac tu r ing Inc. R E C O M M E N D A T I O N : Rev i se E x c e p t i o n as fol lows:

Exception: Louvers inter locked with the e q u i p m e n t so they are proven in the full open posit ion pr ior to ma in bu rne r ignit ion and du r ing ma in b u r n e r operat ion. Means shall be provided to prevent the main b u r n e r fo rm igni t ing sbou ld the louver fail to open du r ing bu rne r s tar tup and to shu t down the main bu rne r if the louvers close du r i ng bu rne r operat ion. W hen field installed. in ter locking louvers or d a m n e r s shall be approved and disnlav the aonroor ia te symbol. SUBSrI 'ANTIATION: As per Section 5.1.1 "Gas appliances, accessories, a n d gas utilization e q u i p m e n t shall be approved." It is therefore p r u d e n t to require any device connec t ed or inter locked to an approved device, be also approved. Approval S tandards are in place such as the "AGA Requ i remen t s for Electrically Opera t ed Automat ic Combus t ion and Vent i la t ion Air Control Devices for Use With Gas-fi(ed Appliance. No. 1-88, February 22, 1988." Products are on the marke t such as listed in the July 1997 IAS Directory page 1202. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T he phrase "when field installed" is unnecessary since all are field installed. The cur ren t text is adequa te and the p roposed text lends itself to non-un i fo rm interpreta t ions by di f ferent author i t ies having jur isdict ion. In addit ion, the Panel does no t believe tha t listing the p roduc t is necessary s ince the Submit te r provided no data to show that non- listed products are a problem. N U M B E R O F C O M M I T T E E M E M B E R S E L I G I B L E T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A65) 54/Z225.1- 64 - (5.3.6 (New)): Reject SUBMITTER: Richard G. Tandy , York Internat ional R E C O M M E N D A T I O N : Add new text as follows:

5.3.6 The r e c o m m e n d e d source o f combus t ion air is to use the ou tdoor air supply. However, the use of indoor air in mos t appl icat ions is acceptable except as follows:

1. If the fu rnace is installed in a conf ined space it is r e c o m m e n d e d tha t the necessary combus t ion air come f rom outdoors by way of attic, crawl space, air duct , or direct opening .

2. If ou tdoor combus t ion air is used, the re mus t be no exposure to installations or subs tances listed in "3" below.

3. The following types of installation may require O U T D O O R AIR for combus t ion , due to chemical exposures:

- Commercia l Buildings - Buildings with indoor pools - Furnaces installed in laundry rooms - Furnaces installed in hobby or craft r ooms - Furnaces installed near chemical s torage areas

Exposure tb the following subs tances in the combus t ion air supply may also requi re O U T D O O R AIR for combust ion:

- P e r m a n e n t wave solut ions - Chlor ina ted waxes a n d cleaners - Chlor ine based swimming pool chemicals - Water sof tening chemicals - De4cing salts or chemicals - Carbon tetrachloride

Halogen type refrigerants - Cleaning solvents (such as per chloroethylene)

Pr in t ing inks, pa in t removers, varnishes, etc. Hydrochlor ic acid

- Cements and 61ues Antistatic fabric sof teners for clothes dryers

- Masonry acid washing materials S U B S T A N T I A T I O N : T h e impor tance of combus t ion air quality and its' effects on appl iance corrosion and pe r fo rmance applies to all gas-fired appliances. This text is verbatim f rom the ANSI Z21.47-1993 - CAN/CGA-2.3-M93. COMMITTEE ACTION: Reject. C O M M I T T E E S T A T E M E N T : The proposed text is non- enforceable. The te rms "may" are no t used in a code. T h e Panel believes due p roposed text is m o r e appropr ia te for an installation instruct ion, no t the NEGG. In addit ion, many i tems may be miss ing f rom the list, a n d inc lus ion of all i tems would be nearly impossible . N U M B E R O F C O M M I T T E E M E M B E R S E L I G I B L E T O VOTE: 24

VOTE ON C O M M I T T E E ACTION: AFFIRMATIVE: 20 ABSTENTION: 1 N O T RETURNED: $ Bigelow, Rhead, Whi te

EXPLANATION O F A B S T E N T I O N : BUCHAL: At ten t ion shou ld be drawn to possible indoor air

con taminan t s or si tuations which may have deleter ious effects on combus t ion appliances. I a m in genera l a g r e e m e n t however tha t the p roposed wording is unen fo rceab le as written.

(Log #A87) 54/Z223.1- 65 - (5.4.3(c)): Accept SUBMITTER: J ames A. Ran fone , Amer i can Gas Associat ion

I R E C O M M E N D A T I O N : Revise Section 5.4.3 (c) as fo l lows: I (c) T h e inside m e a n s of access shall be a p e r m a n e n t , or fold- ] away, inside stairway or ladder, t e rmina t ing m an enclosure,

scuttle, or t rap door. Such scuttles or trap doors shall be at least [ -2422 in. x 24 in. (64-56 c m x 61 cm) in size, shall open easily and I safely u n d e r all condit ions, especially snow, and shall be I cons t ruc ted so as to pe rmi t access f rom the roof side unless I deliberately locked on the inside.

S U B S T A N T I A T I O N : To confo rm to the Internat ional MechaniCal Code requ i rement . COMMITTEE ACTION: Accept . N U M B E R O F C O M M I T T E E M E M B E R S E L I G I B L E T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A5) 54/Z223.1- 66 - (5.5): Reject S U B M I T r E R : Cleaston L. Runion , Brown Stove Works, Inc. R E C O M M E N D A T I O N : Add text as follows:

Instruct ions covering p roper usage and installation shall be a t tached to each assembled appl iance connector .

The ins t ruct ion shall include, as a m i n i m u m , s ta tements to the effect that:

a~ T h e gas outlet shall be in the same r o o m as t he appl iance an d the connec to r m u s t no t be concea led within or r u n t h ro u g h any wall, f loor or part i t ion.

b. The connec to r shall be o f adequa te length. c. T h e final assembly shall be tested for leaks. CAUTION:

Matches, candles, open f lame or o ther sources o f igni t ion shall n o t be used for this purpose . Leak test solut ions may cause corrosion - water r inse after test.

d. Contact with fore ign objects or subs tances shall be avoided. e. The connec tor shall no t be kinked, twisted or torqued. f. Connec tors are no t des igned for m o v e m e n t after installation.

Bending, f lexing or ex t reme vibrat ion mus t be avoided. Normal operat ion o f a clothes dryer, infrared tubi~ hea te r or similar appl iance does no t const i tute ex t reme vibration or movement .

g. Connec tors are for use only on p ip ing systems having fuel gas pressures no t in excess of 1 /2 psi (3.45 kPa).

h. This connec to r complies with the S tandard for Metal Connec to r s for Gas Appliances, ANSI Z21.24 • CGA6.10 (unless this is shown as a marking) :

i. The connec to r and fittings are des igned for use only on the original installation and are no t to be reused for ano th e r appl iance or at a n o t h e r location.

Connec to r s shall also bear a caut ionary s t a t emen t to the effect that:

CAUTION: C O N N E C T O R NUTS MUST N O T BE CONNECTED DIRECTLY T O PIPE THREADS. THIS C O N N E C T O R MUST BE INSTALLED WITH ADAPTERS PROVIDED.

Connec to r s for flare type fittings shall also bear an illustration similar to the following: S U B S T A N T I A T I O N : It has come to our a t ten t ion that old connectors are be ing reused when new or di f ferent gas ranges are be ing installed.

More t han one manufac tu re r has been notified of leaks tha t has led to fires. We need a s t a tement to reflect the coverage in Z21.24 in the National Fuel Gas Code. I th ink this will be new coverage. We don ' t need 10-15 year connectors be ing reused. COMMI'VI 'EE ACTION: Reject. C O M M I T T E E S T A T E M E N T : ANSI Z-21.24 Connec to r S tandard already requi res labeling. N U M B E R O F C O M M I T T E E M E M B E R S E L I G I B L E T O VOTE: 24 VOTE ON C O M M I T T E E A C T I O N :


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N F P A 5 4 - - A 9 9 R O P

(Log #A10) 54/Z223.1- 67- (5.5.7): Accept in Principle SUBMITrER: Rnssel lwan, Metropolitain Utilities District RECOMMENDATION: Change last sentence to:

"Illuminating appliances, ranges, clothes dryers, decorative annliances, and outdoor grills shall not be so equipped." SIJBSTANTIATION: Fuel lines to decorative appliances are usually installed in wall or ceiling spaces where sediment traps can't be reached. The use of sediment traps where tbey can't be maintained is not practical. COMMITTEE ACTION: Accept in Principle.

] Change the proposed text to read as follows: "Illuminating appliances, ranges, clothes dryers, decorative

] appliances for installation in vented fireplaces, decorative vented [ appliances, and outdoor grills shall not be required to be so [ equipped."

COMMITTEE STATEMENT: The submitter (who was present) noted that be inadvertendy omitted the phrase "required to be"; this was added to the proposed text. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, Wbite

(Log #A4) 54/Z223.1- 68 - (Chapter 6): Reject SUBMITTER: Edward M. Nolan, Equitable Gas Company RECOMMENDATION: Add new text as follows:

"Sizing guidelines for vent-free supplemental heating products need to be added." SUBSTANTIATION: None. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The submitter did not provide adequate information about the guidelines to which he was referring. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP22) 54/Z223.1- 69- (6-2.3): Accept SUBMITTER: National Fuel Gas Code Committee RECOMMENDATION: Revise 6.2.3 to read:

6-2.3 Clearances for Indoor Installations (a) lasted air conditioning equipment installed in rooms large

in comparison with the size of the equipment shall be installed with clearances per the terms of their listingand the manufacturer's instructions. See Section 1.7 for definition.

(b) Air conditioning equipment installed in rooms NOT large (such as alcove and closets) in comparison with the size of the equipment shall be listed for such installations and installed in accordance with the manufacturer's instructions. Lis(ed clearances shall not be reduced by the protection methods described in TABLE VI, regardless if the enclosure is of combustible or noncombustible material.

(c) Unlisted air conditioning equipment shall be installed with clearances from combustible material of not less than 18 in. (46 cm). above the equipment and at the sides, front, and rear, and 9 in. (23 cm) from the draft hood.

(d) Air conditioning equipment (listed and unlisted) installed in rooms large in comparison with the size of the equipment shall be permitted to be installed with reduced clearances to combustible material provided the combustible material or equipment is protected as described in TABLE VI (see 6.2.3(b)).

(e) Where the plenum is adjacent to plaster on metal lath or noncombustible material attached to combustible material the clearance shall be measured to the surface of the plaster or other noncombustible finish where the clearance specified in 2 in. (5 cm) or less.

(f) Listed air conditioning equipment shall have the clearance from supply ducts witbin 3 ft (0.9) of the plenum be not less than that specified from the plenum. No clearance is necessary beyond this distance. SUBSTANTIATION: Notes to Table V which are requirements are relocated to the proper location. COMMITTEE ACTION: Accept. NUMBER OF COMMrrTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP23) 54/Z223.1- 70- (6.3.1): Accept SUBMITrER: National Fuel Gas Code Committee RECOMMENDATION: Revise 6.3.1 to read as follows:

6.3.1 Clearances (a) Listed central heating furnace and low pressure boiler installed in rooms large in comparison with the size of the equipment shall be installed with clearances per the terms of their listing and the manufacturers instructions. See Section 1.7 for definition.

(b) Central heating furnace and low pressure boiler installed in rooms NOT large (such as alcoves and closets) in comparison with the size of the equipment shall be listed for such installations Listed clearances shall not be reduced by the protection methods described in TABLE VI, regardless if the enclosure is of combustible or non combustible material.

(c) Unlisted central heating furnace and low presstire boiler installed in rooms large in comparison with the size of the equipment shall be installed with clearances not less than that specified in Table V.

(d) Central heating furnace and low pressure boiler (listed and unlisted) installed in rooms large in comparison with the size of

. the equipment shall be permitted to be installed with reduced clearances to combustible material provided the combustible material or equipment is protected as described in Table VI (see 6.$.1.b).

(e) Front clearance shall be sufficient for servicing the burner and the furnace or boiler.

(f) Where the plenum is adjacent to plaster on metal lath or noncombustible material attached to combustible material the clearance shall be measured to the surface of the plaster or other noncombustible finish where the clearance is specified is 2 in. or less.

(g) The clearance to the equipment shall not interfere with the combustion air, draft hood clearance and relief, and accessibility for servicing. See 5.2.1, Section 5.3 and 7.12.8.

(h) Listed central heating furnaces shall have the clearance from supply ducts within 3 ft of the plenum be not less than that specified from the plenum. No clearance is necessary beyond this distance.

(i) Unlisted central heating furnaces with temperature limit -controls which cannot be set higher than 250°F shall have the clearance from supply ducts within 6 ft of the plenum be not less than 6 in. No clearance is necessary beyond this distance.

(j) Centr~ heating furnaces other than those listed in 6.3.1.h or I shall clearances from the supply ducts of not less than 18 in. from the plenum for the first $ ft, than 6 in. for the next 3 ft and 1 in. beyond 6 ft. SUBSTANTIATION: Notes to Table V which are requirements are relocated to the proper location. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #cP21) 54/Z223.1- 71 - (6.3.1 Table V): Accept SUBMITrER: National Fuel Gas Code Committee RECOMMENDATION: Revise Table V to read:

Revised draft revision to Table 6-2.3 as shown on following page. This makes the table applicable only to unlisted appliances. SUBSTANTIATION: The table is revised to be applicable to unlisted appliances only. This is consistent with the philisophy of the National Fuel Gas Code Committee that listed appliances be installed in accordance with the terms of their listing. The notes to the table are relocated to Sections 6.2 and 6.3 in separate proposals (CP21 and 22), and they are referenced a new Table note. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


667

N F P A 5 4 - - A 9 9 R O P

[Table for 54/Z223.1-71 (Log #CP21)]

I

Table V Clearances to Combustible Material for Unlisted Furnaces and Boilers Installed in Rooms Which Are Large in Comparison With

I Automatically fired, forced air or gravity system, equipped with temperature limit control which cannot be set hi[[her than 250°F. II Automatically Fired Heating Boilers Steam boilers operating at not over 15 psi and hot water boilers operating at 250°F or less I11 Central heating boilers and furnaces, other than above

the Size of Equipment Minimum Clearance (Inches)

Above and Top of Jacket Sides Front Sides of Boiler and Rear Plenum

18

6 18

18

Draft Hood and

Barometric Draft

Regulator 18

6 is 18

18 18

IV Air Conditioning Equipment , 18 , 18 18 18 Note. See 6.2.3 fc requirements for air conditioning equipment and 6.3.1 for add heating boilers and furnaces

Single Wall Vent Connector

18

18

18 18

18 18 lal requirements for central

(Log #N14) 54/Z223.1- 72- (6.3.6(d)): Reject SUBMITTER: James Ronspiez, Wisconsin Power & Light RECOMMENDATION: Add at the end of the section:

"so that it separates the circulating air from combustion and ventilation air." SUBSTANTIATION: None. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: The text is explanatory in nature and adds no substance to the requirement. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A88) 54/Z223.1- 73 (6.4.2(a)): Accept in Principle SUBMITTER: James A. Ranfone, American Gas Association RECOMMENDATION: Revise section 6.4.2 as follows:

6.4.2 Exhanstingto the Outside Air. (a) Type I andTyp_ e 2 clothes dryers ~hal[ t~¢ ~xhausted to the

outside, ingtallc~ in cl~:c~ :~.l! bc c".~P.a'.:~tc~ a t~ "..k.c ~-.:'.z!~e :2r, a.qd n No other fuel-burning appliance shall be installed in the same closet with ~ Type I clothes dryer. T)~e I cl~hcz dr'/c~ zhall ~ct be :.n=*~.!!ed in b.~.fl:r~e:r.z ¢r bea.a.a.rccm: uMcz: e'.:l:a'-zted tc the c,'a',~,'!~c air.

SUBSTANTIATION: To conform to the Z21.5.1 requirement that was recently changed to require that all Type I dryers be exhausted to the outside. COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: The submitter's intent was met in the Panel Action and Statement of Proposal 54/Z223.1-76 (Log #N2). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A99) 54/Z223.1- 74 - (6.4.2(a)): Accept in Principle SUBMITTER: Larry Wrobel, Raytheon Commercial Laundry LLC RECOMMENDATION: Revise text to read as follows:

(a) Type I clothes dryers shall be exhausted to the outside air. SUBSTANTIATION: Z21.5.1 already has a requirement to provide instructions to exhaust to the outdoors.

NOTE: Supporting material is available for review at NFPA Headquarters. COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: The Submitter's intent was met in the Committee Action and Statement on Proposal 54/Z223.1-76 (Log #N2).

668

NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #NS) 54/Z225.1- 75 - (6.4.9(a) and (b)): Accept in Principle Note: This Proposal appeared as 54-51 which was held from the

Annual 96 ROC on Proposal 54-110. SUBMITTE~ Larry Wrobei, Speed Queen Co. RECOMMENDATION: Combine (a) and (b) to read:

"A dryer must be vented to the outdoors." The change will require that 7.2.2(d) be deleted.

SUBSTANTIATION: The new harmonized standard, Z21.5.1- 1995/CGA 7.1-M95, clause 1.22.1 states: "A dryer must be exhausted to the outdoors." The Fuel Gas Code must be changed to be consistent with the dryer standard. COMMITTEE ACTION: Accept in Principle. COMMI'I[TEE STATEMENT: The submitter's intent was met in the Panel Action and Statement on Proposal 54/Z223.1-76 (Log #N2). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE; 21 NOT RETURNED: 3 Bigelow, Rhead, White

(Log #N2) 54/Z223.1- 76 - (6.4.2(a), (b)): Accept in Principle Note: This Proposal appeared as 54-52 which was held from the

Annual 96 ROC on Proposal 54-110. SUBMITTER: Robert St.Louis, Cameo, Inc. RECOMMENDATION: Delete:

t o . h A O ~ ' ~ Z ~:" ^_.4 . . . . t.^. r . . ^ , ~ . . . ~ : . . . . . ,: . . . . . r . h a l ! L.^

!mta!!c~ "n the zemc c!c.~ct. T)~e ! clct.hc~ ~'3"cr: :~=2! ::c.t be

8"at.~ide air. (b) T,~-pc 2 c!c.~.z~ ~Wzrz 5~=.!! ~z z::hv.uzt¢~ to. *~.c c.u~'~z v2:. Proposed wording to read: "Type 1 and Type 2 clothes dryers shall be exhausted to the

outside air." SUBSTANTIATION: In the harmonized American National Standard/Canadian Gas Association Standard for Gas Clothes Dryers, ANSI Z21.5.1 - CGA 7.1, all references to exhausting flue gases indoors have been deleted. The rationale for the deletion follows:

Thejolnt clothes dryer subcommittee agreed to delete all coverage permitting the exhausting of flue gases to the indoors in the draft harmonized Type 1 clothes dryer standard, as the Canadian Type 1 clothes dryer standard (CAN/CGA 7.1) and Canadian Installation Codes specify that dryers be exhausted to the outdoors to avoid problems resulting from the accumulation of water vapor, lint and CO.

N F P A 5 4 - - A 9 9 R O P

The Z21/CGAJoint Gas Clothes Dryer Subcommittee requests that the Z223 Committee delete all references or revise wording in the Z223.1 Code which allows Type 1 Gas Clothes Dryers to exhaust flue gases indoors. COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: The change was editorial in nature to comply with text in other sections. In addition, the Committee wished to accept the proposal in principle because it's consistent with the ANSI Z-21 product standards. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #NS) 54/Z223.1- 77 - (6.4.3(a)): Accept in Part Note: This Proposal appeared as 54-53 which was held from the

Annual 96 ROC on Proposal 54-112. SUBMITTER: Robert St.Louis, Camco, Inc. RECOMMENDATION: Revise 6.4.2(a) to read as follows:

(a) Make-up air shall be provided for e!^,~ct !~z~!!c~ Type 1 clothes dryers in accordance with the manufacturer's installation instructions.

] K T / ~ t ' T ' ] ~ . I A F I . . . . . T . - - - - • o l ^ t l . ~ . . - I . . . . '. . . . . k . . . . t . ~ l t ^ t l ~ . . . . t . . ' . - , l _

SUBSTANTIATION: In the harmonized American National S t~d~d /C~nad ian Gas Association Standard for Gas Clothes Dryers, ANSI Z21.5.1 - CGA 7.1, all references to exhausting flue

ases indoors have been deleted. The rationale for thedelet ion Ilows:

The joint clothes dryer subcommittee agreed to delete all coverage permitting the exhausting of flue gases to the indoors in the draft harmonized Type 1 clothes dryer standard, as the Canadian Type 1 clothes dryer standard (CAN/CGA 7.1) and Canadian Installation Codes specify that dryers-be exhausted to the outdoors to avoid problems resulting from the accumulation of water vapor, lint and CO.

The Z21/CGAJoint Gas Clothes Dryer Subcommittee requests that the Z223 Committee delete all references or revise wording in the Z223.1 Code which allows Type 1 Gas Clothes Dryers to exhaust flue gases indoors. COMMITTEE ACTION: Accept in Part.

I Accept the proposal. Delete A-6.4.3.

COMMITTEE STATEMENT: The Committee accepts the proposal to be consistent with ANSI Z-21 product standards. The Appendix item is deleted for consisten icy with the revised text. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #N27) 54/Z223.1- 78- (6.9.3): Reject SUBMITTER: Douglas B. Peabody/John P. Doucette, CT Office of State Fire Marshal RECOMMENDATION: Delete 6.9.3 and its Exception. SUBSTANTIATION: Given the revision in 1996 which requires all direct gas-fired industrial heaters to be listed (ref. 6.9.1) by eliminating the exception for unlisted appliances subject to the approval of the Authority Having Jurisdiction, the statement addressing unlisted direct gas-fired industrial heaters is no longer

~poP licable- MMITTEE ACTION: Reject.

COMMITTEE STATEMENT: There are many unlisted direct-fired industrial heaters that are used safely. The Panel developed a Committee Proposal 54/Z223.1- 33 (Log #CP2) to clarify this issue. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Pdlead, White

(Log #CP14) 54/Z223.1- 79- (6.9.3(b) Exception): Accept SUBMrI'rER: National Fuel Gas Code Committee RECOMMENDATION: Move existing 6.9.3(b) Exception to 6.9.1 Exception (new). Change 6.9.3(b) to read as follows:

"Unlisted direct gas-fired industrial air lleaters shall be installed according to the manufacturers' instructions." SUBSTANTIATION: This change properly relocates the Exception and rectifies any confusion about if unlisted direct gas- fired industrial air heaters are permitted. COMMITTEE ACTION: Accept.

NUMBER OF COMMITTEE MF_3~ERS ELIGIBLE TO VOTE: VOTE ON COMMITTEE ACTION:


24

(Log #A89) 54/Z223.1- 80- (6.30.1 Exception No. 2): Accept SUBMn~i'ER: James A. Ranfone, American Gas Association RECOMMENDATION: Revise Exception No. 2 to read as follows:

Exception No. 2: Water heaters shall be permitted to be installed in a closet located in a bathroom or bedroom, cr a-q7 c-:euP iea rc.c...-x ::vr.."z=217 kept clv=c~ where the closet !~ u~cd e'.:c!'.=e';'e!7 for : :;==or hc=tzr, ;v~zrc =~k.z enzlc.:.c~ :p:zc has a weather-stripped solid door with a serf-closing device, and where all combustion air is obtained from the outdoors. SUBSTANTIATION: The language "any occupied room normally kept closed" is unenforceable code language. The second change would eliminate the requirement that the closet be constructed exclusively for a water heater. A listed water heater that is installed and operated in accordance with the manufacturers instructions offers sufficient requirements for its safe operation, regardless of location. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A11/N34) 54/Z223.1- 81 - (6.30.1(a)): Accept in Principle SUBMITI'ER: Wilbur L. Haag, Jr., McBee, SC RECOMMENDATION: Relocate the last sentence to a new (c) as:

"See 5.1.8 for flammable vapor precautions." SUBSTANTIATION: The flammable vapor warning should not be part of the bathroom/bedroom p.aragraph. These rooms are the least likely to have a gasoline spdl. This warning is sufficiently important to water heaters to warrant its own paragraph. COMMITTEE ACTION: Accept in Principle. Modify the proposed text to read as follows:

"See 5.1.8 for flammable vapors." COMMITTEE STATEMENT: Section 5.1.8 provides the precautions for flammable vapor, so the word "precaution" is removed. NUMBER OF COMMITFEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP20) 54/Z223.1- 82 - (6.32): Accept SUBMITTER: National Fuel Gas Code Committee RECOMMENDATION: Add a new section 6.32 to read as follows:

6.32 Appliances installed manufactured housing after the initial sale shall be listed for installation in manufactured housing, or approved, and shall be installed in accordance with the requirements of this Code and the manufacturers installation instructions.

Appliances installed in the living space of manufactured housing shall be in accordance with the requirements of 5.3. SUBSTANTIATION: To provide guidance on the replacement of appliances in manufactured housing. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITI'EE ACTION:


COMMENT ON AFFIRMATIVE: PAKRUDA: 1. As I understand it, a task force has been

established to study the entire issue on how to address the appliances installed in manufactured homes. It would seem to me that we should wait for the task force's recommendation before any recommendations are considered for inclusion in the NFPA 54 Report on Proposals.

2. I believe that a new or revised code for manufactured homes (NFPA 501) may include gas appliances. Therefore, the NFPA 54 p,'oposal may be in conflict with the NFPA 501.

669

NFPA 54 - - A99 ROP

3. The proposal 's wording is "shall be listed for installation in manufacmre~t hous ing or approved." T he prob lem I have with this is that approved is def ined as a means "acceptable to the author i ty having jur isdict ion." What this means to me as an author i ty having jur isdic t ion is tha t if the appl iance is listed for manufac tu red h o m e s even t h o u g h the word or is before the word approved, l would approve it. I would base the approval subject to listing. For instance, the p resen t manufac tu re r ' s instruct ions would avow the installation of unven t ed space heaters in manufac tu red hous ing where approved by local codes. Many sou the rn states ei ther by statute or regulat ion have approved the unven ted space hea te r for use in manufac tu red h o m e s u n d e r certain limitations. Labels approved by Internat ional Approval Systems being placed on the hea te r car ton and on the hea te r by the manufac tu re r state approved for manu fac t u r ed (mobile) homes installation as provided for by local codes. I believe that the proposed verbiage is r e d u n d a n t and shou ld not be pu t in the Report on Proposals. The defini t ion approved and the author i ty having jur isdic t ion already give the Authori ty Having Jurisdict ion the r ight to approve gas appl iances for use in manufac tu red housing. 1 have submi t ted copies of p roposed revisions to ANSI Z21.11.2 which will cover listing, a copy of Alabama's beater law and some sample labels p resendy be ing nsed.

Note: Suppor t ing material available for review at NFPA headquar ters .

(Log #A46) 54/Z223.1- 83 - (7.1, 7.2.1, 7.3.4, 7.4.3, 7.5.1, 7.5.2, 7.5.4, 7.5.5, 7.5.6, 7.5.7, 7.6.1, 7.6.3, 7.6.6, 7.10.12, 7.12.6, 7.12.7, 7.13, 7.14, 7.15): Reject SUBMITTER: Jud Collins, O k l a h o m a State Heal th Dept- Occupa t iona l RECOMMENDATION: Revise text as follows: 7.1 General. This Part recoga!ze: d:at the cl:o!ce of vent ing

cqu :pme : - t . . . . . v . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . + : . . . . . . . . . . . . . . ~ + 1 . : ~ . , ....... : . . . . . . ...... .4 t O ' * ...I.~,I . . . . . . . +

t!-e e q u i p m e n t genera te : flue o r - 'ent g-=:e: that me)" condense in t!~c vcntlng m~tem. Sec Sec'4on for "&e definPdon of "2-ese ":cnted

~.2.1 Connec t ion to Ventifig Systems. Except as permi t ted in 506.2.5 . . . . . . . . . . Sections 506.2.2 t h rough :~ ., .^ ~cr.e and Section 501.8 irr

o f the IFGC, all gas utilization e q u i p m e n t shall be connec ted to vent ing systems. 7.3.4 Mechanical Draft Systems. Mechanical draft systems shall Comply with the following:

(a) Gas udlizat ion equ ipment , except incinerators, requi r ing vent ing shall be permi t ted to be vented by means of mechanical draft systems of ei ther forced or induced draft design.

(b) Forced dr,fit systems and all por t ions of induced draft systems u n d e r positive pressure dur ing opera t ion shall be des igned and installed so as to prevent leakage of flue or vent gases into a building.

(c) Vent connec tors serving e q u i p m e n t vented by natural draf t shall no t be connec ted into any port ion of mechanica l draft systems opera t ing u n d e r positive pressure.

(d) When a mechanica l draft system is employed, provision shall be made to prevent the flow of gas to the main burners when the dr~fft system is no t ~ . w ~ . ~ : . . . . . . . . . . ,:,~;.., . . . . . . . . : ~ r equ i r emen t : a f the e q u i p m e n t for . . . . ~_~ ̂ ..~.w, . . . . . . . . . . . . . . . . . . . . orovidin~_ _ the remtired dr.fit-

(e) Tbe exit terminals o f mechanica l draft systems shall be not less than 7 ft (2.1 m) above grade wl~ere located adjacent to public walkways and shall be located as specified in 506.6(a) and 506.6(b).

(f) Mechanical draft systems shall be installed in accordance with the te rms of their listing and the manufac tu re r s ' instructions.

7.4.3 Special Gas Vent. Special gas vent shall be listed and installed in accordance with the terms of the special gas vent listing and the manufac tu re r s ' instructions.

7.5.! Listing or Ccnstruc*2~n. . ~..:,. ~,.: . . . . . . ,.~,, u^ :~..~,,~a : ~ accordar:ec ;;Jth ¢'.~ Fac to~ . . . . . . . . . . . . . . . ,o

: hob •!sting and t! 'e m a c . u f ~ . c t u r e r z ' !n:wuc' :ana.

...:,,. e . ~ _ a ~ . a e^. e , . : ~ . . ~ . . Fbep!aees, Ven~, and Sol~d Fuel . , ~ . . . . . • . . . . . . . . . . . . . . . . 7 o ,

/ ~ ' t E l . . . . . . . . I . : . . . . . . I . ~ 1 1 k ~ ~ . . : 1 . . - - A : ~ - + ~ I I A : . . . . . . A . . . .

l ; n ~ A . . d + l . . . . . . . . . A o 1 - - . , g l . . ~ I : ~ : ~ . . v v . . . . : . . . . . . . ~, a listed c h i m n c 7 ' : - : - - s ; : tem,

or ca&or approved . . . . . . . . . .... ":'^' "~-, . . . . . . . . . . . . "" .-~-:-+ . . . . . coffee!on, erca~on, .^c.__:__ • g . . . . . . . . . . e,, 3 r c2aek;2, o:n - 'cnt ~-~c3 at tc ;n .pc~t - : rcg np to ~.~.°n~°~. It'IQ C)O("X

l iner man"~aet '-re~a' inatPae-:c.na ~=nd *~.e tern'.= of the ~ist'ng. A

• &e connection i s to 5e rrw.dc to "&e liner. The !abe! shall re~--ad:

-FS~k:"*ZZ~;.~g" ZF,f-Tgn~D-:!:3oT-.TT;:ST£%~h e-'~ting

7.5.2 TermSnwdon. ¢~ a ~,.: . . . . . ~ . . . . ; a ~ , : ~ , • . . . . , . . . . hea t ~ ut!!:zaHon

• ~\..., h igher than any por t ion of a b u i ! ~ n g :;:.thin a ho.qzsn*~.a!

~ , . v " | ' / ' ~ I ~ , * A

connec ted e q u i p m e n t d . ' ~ t h e e d outlet or flue collar. 7.5A ' . . . . . a ^~ ^,, C.h: ..... , - , ........ v ...... ~, . . . . . . . . . . ~ a a~nce c.r connec t ing a v e n t

. . . . . . . . . . . . . . . . . . . . . . . . : . . . . . . . . . . . . . . ~ p a ~ g e ; : = ) ' :hall ~*'̂

I~:LE22CZY ~ 7 " ~ ; ; ~ . F L , 2 2 2 o ; ;e ?;Y L-Z ";Z~S. ' . : .L k\-~ ,C'.Z . IL\LC

e x ~ s t ~ n e , ~ . a m n w . . . . . . . . v . . . . . . . . . . . . . . . . . . . . . . . . c . . . . . . . . . . ;; 'hen an appl iance i: replaced ~)' an appl iance of : imilar ~'pe,

,~, . . . . . . . . . . . ~1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~ ..... r emain I i ~ k d . . . 1 ~ - ^ . 1 . . . I . . . . . * : . . . . .

' , ~ / . . . . . . . * u ~ t " . . . . . • . . . . . . . . . . . . . . . . . . . t 5 ~ * " . . . . . . . / . . . . . . . . .

for ~ c in t ended application, it :ha!! he repaired, rebuilt, l ined,

:u:mb!e far the e q u i p m e n t to be at tached.

I ~ . N £ 1 f i A *1 . . . . . . . . . /

. . . . . . . r r . . . . . . . . . . . . . . . I . . . . . l " . . . . . . . . . . . . . . . . . . . 1 . . . . . . . .

• dg! . . . . . . . . .a ,.~ . . . . a.~â T,.^ ~, . . . . . . . . . t.~,, ha-'e a = t ~qt~ng . . . . . . . . . .

installed so "m upper edge is at lea~t 12 !n. (30 . . . . - - - " , ~ . ~ ' ^ ' . . . . . . . . . . . ='^ , . . . . . . . a ~ ~c the lowest ch imney :~'~" opening.

7.6.1 Ap.plication. Vents shall comply with the follows: (a) Gas vents shall be installed in accordance with die terms of

their listings and the manufac tu re r s ' instructions. (b) A Type B-W gas vent shall have a listed capacity n o t less t h an

that of the listed vented wall fu rnace to which it is connected. (c) A gas vent passing t h r o u g h a roof shall ex tend t h ro u g h die

roof f lashing, r e e f j a c k , or roof thimble. (d) Type B or Type L vents shall ex tend in a general ly vertical

direct ion with offsets no t exceeding 45 degrees, except that a vent system having not more than one 60-degree offset shall be permit ted.

Any angle greater than 45 degrees f rom the verdcal is considered horizontal . The total horizontal dis tance of a vent plus the horizontal vent connec to r serving draft hood-equ ipped appl iances shall no t be greater than 75 percen t of the vertical he igh t of the vent-

Exception: Systems des igned and sized as provided in Section 501.13.2 of the IFGS or in accordance with o ther approved eng inee r ing methods .

Vents serving Category I fan-assisted appl iances shall be installed in accordance with the appl iance manufac tu re r s ' instruct ions and Section 501.13.2 of the IFGS or o ther approved eng ineer ing methods .

• , ~ / . . . . . . . . . . . . . . . . . . . . ] . . . . . . . . . . . . . . I . . . . . . . . . . . . . . . . . .

7.5.3 Size of Gas Vents. Vent ing systems shall be sized and cons t ruc ted in accordance with Secuon 501.13.2 of the IFGS or

6 7 0

N F P A 5 4 - - A 9 9 R O P

other approved engineer ing methods and the gas vent and gas equ ipment manufacturers ' instructions.

(a)* C=tcgc. : / ! AFF!'=.':cc:. The sizing of natural draft venting systems serving one or more listed appliances equipped with a draft hood or appliances listed for use with Type B gas vent, installed in a single story of a building, shall be in accordance with Section 501.13.2 of the IFGS or in accordance with :c.::nd approved engineer ing practice.

NOTE. C a t ~ e , v . j . ~vt- . . . . . . . . . . . t . . . . . . . . . . . . . . . . ~ - . r v - ~

. . . . . . . . . . . . . . . " 1 . . . . . . . . . . . . . . . . . " a ~ ' r ' l ~ . . . . . . . . . . . . . .

Excepuon I~o. 1: As an alternate me thod for sizing an individual gas vent for a single, draft hood-equipped appliance, the effective area of the vent connector and the gas vent shall be not less than due area of the appliance draft hood oudet, nor greater than seven times the draft hood outlet area. Vents servicing fan-assisted combustion system appliances shall be sized in accordance with Section 501.13.2 of the IFGS or other approved engineer ing methods.

Exception No. 2: As an alternate method for sizing a ~ vent connected to more than one draft hood-equipped apphance, the effective area of the vent shall be not less than the area of the largest vent connector plus 50 percent of the areas of additional draft hood oudets, nor greater than seven times the smallest draft. hood outlet area. Vents serving fan-assisted combustion system appliances, or combinat ions of fan-assisted combust ion system and draft hood-equipped appliances, shall be sized in accordance with Section 501.13.2of the IFGS or other approved engineer ing methods.

(b) ~+~e,~- I . . . . . . e,~- ,, . . . . . . . ~ - ~ , ~ ' + , . . . . v v . . . . . . . . . The sizing of gas vents for Category II, Category III, a n d c a t e g o r y IV gas utilization equipment shall be in accordance with the equ ipment manufacturers ' instructions.

7.6.6 In those localities where solid and liquid fuels are used extensively, gas vents shall be pe rmanendy identified by a label at tached to the wall or ceiling at a point where the vent connector enters the gas vent. the label shall read:

"This gas vent is for appliances that burn gas. Do not connect to solid or liquid fuel-burning appliances or incinerators." f l . . . . + I . ^ + : + . , I . + . - : - - + : , . - ~ + . A . + . + I ^ ~ . I . + 1 1 A ~ - ~ 1 . . . . . I . ~ + I . ~ + .++ . . . . . . . . . . ~ . . . . . . . I . . . . " ' J ~ J . . . . . . . . . . . . . . . . . . . . . . . 1 1 1 . + + , 1 = 1 . . . . . . . . . +

. . . . . : + . . + . . . . . . I . ~ I ^ + ~ 1 + ~ + . ,

. . . . . . . . . . . . . . • . . . . . . . . I '

7.10.12 Location. Where the vent connector used for gas utilization equipment having a draft hood or for Category I appliances is located in or passes through an attic, crawl space, or other a r c : ".~:: :"'=7 . . . . . . ~.^ .~,.a, uncondi t ioned snace that port ion of the vent connec tor shall be of listed double-wLall Type B or Type L vent material or material having equivalent insulation qualities.

7.12.6 Incinerator Draft Regulator. A listed gas-fired incinerator shall be permit ted to be equipped with a listed single acting barometr ic draft regulator where r e c o m m e n d e d by the incinerator manufacturer. This The draft regulator shall be installed in accordance with the i~o-~-~cfi~n: =cc.~mpan#ng the incinerator manufacturer ' s instrncdons.

Install In Same Room. A draft hood or a barometric draft regulator shall be installed in the same room or eni:losure as the equipment in such a manner as to prevent any difference in pressure between the hood or regulator and the combustion air supply.

Positioning. A'draft hood or draft regulator shall be in st}dled in the position for which it was designed with reference to the borizontal and vertical planes and shall be located so that the relief open ing is not obstructed by any part of the gas utilization equ ipment or adjacent construction. The equ ipment and its draft hood shall be located so that the relief opening !0 : .zzzzz!5Ic has acces~ for checking vent operation.

7.13 Manually Opera ted Dampers. A manually operated damper shall not be placed in the vent connector from any utilization equipment , except iri a connector servin~ a' listed gas-fired incinerator where r e c o m m e n d e d by the incinerator manufacturer ,and installed in a accordance with ~ c !a~:ruzfi~=z acc~mFc_-:~-xg th~ incinerator manufacturer ' s instructions. Fixed baffles shall not be classified as manually opera ted dampers.

7.14 Automatically Opera ted Vent Dampers. #z~ Automatically operated vent d a m p e ~ shall be of--a- listed . t ~ .

7.15 Obstructions. A device that retards the flow of vent gases shall not be installed in a vent connector , chimney, or vent.

Exceptions No. 1: Draft regulators and safety controls (1) specifically listed for installation in venting systems and installed in accordance with the terms of their listing, and (2) designed and installed in accordance with approved en~gineering methods and approved ~)" fi~.e a'.:"..~.2~ h:;"..'zgjur:.r~a:.c*.=2n.

. . . . . . : ^ - nT^ 2: Listed heat reda imers and automatically opera ted vent dampers installed in accordance with the terms of their listing.

t z ~ v -v--= -̂ .~'1̂ .v. 3: Approved economizers, heat reclalmers, and recuperators installed in venting systems of equ ipmen t not required to be equ ipped with draft hoods, provided the gas utilization equ ipment manufacturer ' s instructions cover the installation of such a device in the venting system and performance in accoi 'dance with 506.3.1 and 506.3.2 is obtained.

The tables in Part II shall not apply where any of the devices or the equ ipment :~-:ered addresse0, in 7.15, Exceptions ~ 1, 2, and 3 is installed in the vent. Other approved engineer ing methods shall be used to size tl~w,~such vents. SUBSTANTIATION: The majority of the p roposed modifications are editorial in nature and are in tended to clarify intent, enhance readability, p romote uni form interpretat ion, eliminate redundancies, eliminate unnecessary commentary text and make the text style and format consistent with o ther ICC codes.

The proposed modifications that are no t editorial in nature are addressed as follows in the order in which they appear in the text.

1. Sections 7.5.1 and 7.5.2 are r edundan t with Sections 505, 501.3 and 501.11 of the IFGC.

2. Sections 7.5.4 is r edundan t with Section 501.15.2 of the IFGC 3. Sections 7.5.7 addresses fuels no t within the scope of the

IFGS. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposed changes are more than editorial and would leave gaps in the code. Substantiation was not provided. NUMBER OF COMMITrEE MFaMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A47) 54/Z225.1- 84 - (7.3.4(c) (New)): Reject SUBMITTER: Tennison Barry, Michigan Dept. of Labor RECOMMENDATION: A d d new (c) as follows:

(c~ The termination of chimneys or vents euuinned with Dower exhansters shall be located a minimum of 10 ft (3046 ram) from the lot line or fi'om adjacent buildings. The exhaus t shall be directed away from the buildinm SUBSTANTIATION: Power exhausting of products of combustion could result in moisture or corrosion damage to fences, siding and equ ipment located on adjacent property. Many communit ies are reducing side yard setback requirements as they design greater urban density. Increased urban density will increase the likelihood o f vents terminating near a structure on an adjoining property. This proposed language is consistent with Section 805.3.3 in the IMC. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposal is very restrictive and provides no technical substantiation to justify the proposed distance. No differentiation is made for power exhausting Of Type l vs Type 4 appliances. Clothes dryers are not covered. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A30/N38) 54/Z223.1- 85 '- (7.5.1 (a)): Accept in Principle SUBMITrER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

(a) Factory-buUt chimneys shall be installed in accordance with their listing and the manufacturers ' instruction~ F a c t o r ~ b u i l t chimneys subjected to nositive internal static pressure shall be listed for such anolication. SUBSTANTIATI()N: This clarifies that only certain factory-built chimneys are suitable for use when the internal static pressure is positive. (For example, when used with a forced draft boiler in which the chimney diameter is reduced and the appliance forces the flue gases through the system.) Most factory-built chimneys are not desi~aed with air-tight joints and therefore are no t suitable for positive internal static pressure applications. Use or such non- positive pressure capable chimneys in positive pressure application can /does result in outward leakage through joints and seams, associated potential health hazards a n d / o r short or long te rm corrosion problems with the system. Unlike in past, the UL103 (chimney) s tandard now contains test requirements for de termining suitability of chimneys for internal positive pressure applications and a listing program for the same now exists As

671

N F P A 54 1 A 9 9 R O P

such, such ch imneys shou ld be acknowledged as the only ones suitable for positive pressure applications. COMMITTEE ACTION: Accept in Principle.

I Revise text as follows: (a) Factory-built ch imneys shall be installed in accordance with

their listing and the manufac tu re r s ' instructions. Factory-built ch imneys used to vent appl iances tha t opera te at positive vent oressure shall be listed for such anolicat lon. COMMITTEE STATEMENT: The 'p roposa l is accepted and revised to be applicable only to factory-built ch imneys des igned to

erate at positive pressure (in the vent). ER OF COMMITTEE MEMBERS EHGIBLE TO VOTE: 24

VOTE ON C O M M I T T E E ACTION: AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, White

(Log #A49/N39) 54/Z223.1- 8 6 - (7.fi.l(c) Except ion): Accept SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

Exception: Masonry ch i mney flues serving listed gas appl iances with draft hoods, Category I appliance, and o ther gas appl iances listed for use with Type B vent shall be permi t ted to be l ined with a ch imney l ining system specifically listed for use with such appliances. The liner shall be installed in accordance with the l iner manufac tu re r ' s ins t ruct ions and the te rms of the listing. A p e r m a n e n t identifying label shall be a t tacbed at the poin t where the connec t ions is to be made to the liner. The label shall read: "This gz-.z ":e~t ch imney liner is for appl iances that bu rn gas only. Do not counec t to solid or liquid fue l -burn ing appl iances or incinerators." SUBSTANTIATION: T h e "Exception" concerns ch imney liner, no t gas vent. The addi t ion of the word "only" is m e a n t to s t reng then the s ta tement . COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead , White

(Log #A48) 54/Z223.1- 8 7 - (7.5.3 Exceptions, 7.6.3(a) Except ions) : Reject SUBMITTER: David Rock, City of Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Delete Except ions f rom 7.5.3 and 7.6.3(a) as follows:

7.5.3 Size of Chimneys.

d~.£= l~c.c.~, ~ c effcc'5-'c ~-ca of t!~e ch lm~c 7 ~::e ~.h;2! bc ~=c.t Ic~z than the area .?£ =.he t.m-g~: :'c~.: e~nncc te r p!ua 50 pe rcen t ~f ~hc area of .~dd!:!,~na! ~'ac ccl!arz mr d ~ f t !:o,~. a. .~::'2etz, nc.r grea ter th:z: ; c ; ' c : t ' ~ e : "2:e :m~2!c;: z,~-d: 1~oo~ o'-*2ct ^~-ea.

7.6.3 Size of Gas Vents. . . . . . . :^~ No. 1: A~ .?...'~ a!tcr~.atc metl~od for ;!zing an :~.~:.aa..~

t lmes d~c ~r~£t hc.c.~ e.ut!et area. Vc:~t~ zer'5~g ? ~ az~':.~te~ . . . . ~ " ' - ' ; . . . . . . . . . a ~ l ~ a z c c z alkali be z!zc~ !z aecor-~azcc ; :5~ Pa.~. 11 or c.tizer . . . . . . . . ~ ~ , . , = . . . . : . . . . . . ~.-a.

largezt -.'e.xt co.q=ecto.r pl::~- 50 peree~: c.f ~zc z.rczz c.f a.~-~tS.vzal draft hsc.~-, o~t!e~,, ac.r ~, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

hc.s~ .?.~t!et :'den. Ve~.~., ~er'~g f,'~ .".=:..~te~ c.?.m~':r.~on c.)~tem

with P ~ t ~ ~ cr oil;or a~prove~ ^-~: . . . . : . . . . . t.^.~. Remainder of the section r e m m n s u n c h a n g e d .

S U B S T A N T I A T I O N : Except ions No. 1 and No. 2 to Sections 7.5.3 and 7.6.3(a) of the IFGS conflict with Section 501.13.2 of the IFGC.

Section 501.13.2 states that sizing o f Category I Appl iance Vent ing Systems shall be in accordance with 501.13.2 of the IFGS. Section 501.15.2 of the IFGS contains the Category 1 Appl iance Vent ing

Tables and co r respond ing notes to the tables. This secdon does no t include the ou tda ted and overly simplified except ions f o u n d in Sections 7.5.5 and 7.6.5(a) of the IFGS. These except ions do not conform to the research and compu te r mode l i ng done on Category I Appl iance Vent ing Systems.

It appears tha t this commi t t ee has been able to choose which parts of NFPA 54 to include in the IFGS. We are proceeding with the a s sumpt ion tha t this commi t t ee can delete i tems f rom the IFGS as well. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on 54/Z223.1- 91 (Log #A71). The commit tee believes that the Exception No. 2 is needed as revised. The commit tee believes tha t Exception No. 1 is n e e d e d for single appl iance installations. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A125/N60) 54/Z223.1- 88 - (7.5.3 Except ion No. 1): Reject SUBMITI 'ER: Allen L. Ru tz /Lar ry Brand, Bat te l le /GRI RECOMMENDATION: Revise text as follows:

Except ion No. 1: As an al ternate m e t h o d for sizing an individual ch imney vent ing system connec ted to more than one appliance, all with draft hoods, the effective area of the ch imney flue shall be no t less than the area of the largest vent connec to r plus 50 percent of the area of addi t ional f lue collars or draft h o o d outlets, no r greater than seven t imes the smallest draft hood out let area. A m i n i m u n l of one foot of vent connec to r rise shall be nrovided directly above t~[le draft hood oude ts of each anoliance. SUBSTANTIATION: Recent GRI research on the Seven-Times Rule was conduc ted us ing mode l ing a n d exper imenta l analysis. The results, to be d o c u m e n t e d in a GRI Topical Report , reveal tbe impor tance of a m i n i m u m of 1-ft of vent connec tor rise for the vent to properly pr ime when the ch imney is o f a larger flow area than the vent connector . Wi thout the 1-ft rise directly above the draft h o o d outlet, t he ven t may have difficulty establishing adequa te draft. This si tuation is especially critical when the ch imney flow area is seven t imes larger t han that of the vent connector . Ensur ing a m i n i m u m 1-ft rise direcdy above the draft hood out let reduces p r iming t ime a n d associated spillage of c o m b u s t i o n produc ts . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: As the research is no t complete, the proposal is p remature . T h e proposal would establish a m i n i m u m of 1-ft of rise for all installation, which can be an unnecessary hardsh ip . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #AS0/N40) 54/Z223.1- 89 - (7-5.3 Except ion No. 2): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Delete entire Exception. S U B S T A N T I A T I O N : This is a "rule of t humb" m e t h o d of ch imney sizing which works for some applicat ions but definitely does not work for all applicat ions as one migh t expect a rule-of- t h u m b should . This really does no t address the nee d for connec to r rise and results in insuff icient capacity when a larger n u m b e r of appl iances are installed on a relatively shor t c o m m o n vent. T h e rule shou ld e i ther "work" all the time, be modif ied to do so, or be el iminated. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z225.1-91 (Log # A r l ) . The commi t tee believes that the Except ion is n e e d e d as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #AS I /N41 ) 54/Z225.1- 90 - (7.5.5 Except ion No. 2): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

Exception No. 2: As an al ternate m e t h o d for sizing a ch imney vent ing system connec ted to m o r e than one appliance, all with draft hoods, the effective area of the ch imney flue shall be no t less

6 7 2

N F P A 5 4 - - A 9 9 R O P

than the area of the largest vent connec to r plus ~0100 percen t of the a rea of addi t ional f lue collars or draft hood outlets, no r grea ter than seven t imes the smallest draft h o o d out le t area. S U B S T A N T I A T I O N : This p roposed revision to the "rule of t h u m b " m e t h o d of ch imney sizing is i n t ended to significantly increase the percentages o f installations in which it will lead to p roper sizing. The exist ing rule may work for some appl icat ions bu t definitely does no t work for all appl icat ions a n d a lmost never works for S or m o r e appl iances with a low overall ch i mney height . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on 54/Z223.1- 91 (Log #AT1). The commi t tee believes that the Except ion is needed as revised.

NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M r [ r E E ACTION:

AFFIRMATIVE: 2 1 N O T RETURNED: 3 Bigelow, Rhead , White

(Log #A71/N42) 54/Z223.1- 91 - (7.5.3 Except ion No. 2): Accept in Principle SUBMITTER= Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

Except ion No. 2: As an al ternate m e t h o d for sizing a ch imney vent ing system connec ted to more than one appl iance but no t more than 3 anol iances, all with draft hoods, the effective area of the ch imney flue shall be no t less than the area of the largest vent connec to r plus 50 pe rcen t of the area of addit ional f lue collars or draft hood oudets, nor greater than seven t imes the smallest draft hood outlet area. W hen sized in such manne r , the he igh t of the ch imney sl~all be at least 15 ft. Ch imney sizin~ ne t this m e t h o d 8hall no t be permitt¢~l for ch imneys with shor te r height . S U B S T A N T I A T I O N : These proposed revisions to the "rule of t humb" m e t h o d of ch imney sizing is i n t ended to significantly increase the percen tages of installations in which it will lead to p rope r sizing. The ex i sdng rule may work for some applicat ions bu t definitely does no t work for all applicat ions and a lmost never works for 4 or m o r e appl iances with a low overall ch imney heighL COMMITTEE ACTION: Accept in Principle.

~ Revise Exception No. 2 to read: Exception No. 2: As an al ternate m e t h o d for sizing a ch imney

vent ing system connec ted to m~rc fi~a.-: one two appl iances , all with draft bonds, the effective area of the ch imney flue shall be no t tess than the area o f the !argczt larger vent connector draft hood outlet plus 50 percen t of the area of the smal ler ad~!t!cna! flue co ...... ~r draft bond outlet, nor greater than seven t imes the ~mz!!e~t smal ler draft hood out let area.

COMMITTEE STATEMENT: The concep t of the proposal is accepted, but is restricted to two appliances. This retains the rule of t h u m b for the vast majority of applicat ions in its s implest form. The commi t tee agrees tha t the c u r r e n t rule of t h u m b mus t be restricted. T h e te rm flue collar is de le ted as it is no t appropr ia te NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMM IT T E E ACTION:


(Log #N8) 54/Z223.1- 92 - (7.5.3, 7.6.3 Exception No. 2 and 7.7.4 Exception No. 2): Reject Note: This Proposal appea red as 54-64 wbich was held f rom the

Annua l 96 ROC on Proposal 54-155. SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Propose to change the words ".. .shall no t be less than the area of the largest vent connector plus 50 percent of d~e area of the addit ional flue collars or draft hood outlets. . ." t o :

"...shall no t be less than the combined area of all vent connectors- or draft hood outlets.. .". SUBSTANTIATION: This paragraph currently covers an al ternate m e t h o d of sizing ch i mneys / ven t s for mult iple appl iance systems. While it would seem that any al ternate sizing m e t h o d (especially a "Rule of T h u m b " me thod) shou ld be conservative and work in all - cases, or have appropr ia te restrict ions appl ied to it, such is no t the case with dais me thod .

This (current) me t hod has been in existence for a long period of t ime, and works for many relatively s imple systems (two, perhaps three appl iances with significant connec to r rises and fairly

substantial overall vent heights) . However, anyone who unde r s t ands a n d believes in the cu r ren t sizing tables would also concur tha t this "Rule of T h u m b " m e t h o d will n o t provide adequa te sized vent selection in n u m e r o u s instances where three or m o r e appl iances are be ing c o m m o n vented and the he igh t of the system is fairly short . As the n u m b e r o f appl iances increase, the l ikelihood tha t the Rule-of-Thumb m e t h o d of sizing will dictate too small of a ven t size increases s ignif icandy for any except the very tallest he igh t installations.

The p roposed revised wording would reduce the n u m b e r o f such ins tances enormously .

A previous c o m m e n t o r also provided substantial rat ionale for a similar proposal, bu t was den ied due to "insufficient technical substantiat ion." Such technical substant ia t ion is difficult to provide in a neat, concise m a n n e r bu t tha t fact shou ld n o t prevent the code commit tee f r om reviewin~ the accuracy of such claims. It can be easily be proven by c o m p a n n g the results of us ing this me thod , then the tables to select the appropr ia te size for a n u m b e r of examples. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-109 (Log #A77/N40) . The commit tee believes tha t the Except ion is n e e d e d as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A142) 54/Z223.1- 93 - (7.5.3 Exceptions No. 1 and 2, and 7.6.3(a) Except ions No. 1 and 2): Reject SUBMITI 'ER: Steven Shapiro , H a m p t o n Virginia RECOMMENDATION: 1. Delete Exceptions No. 1 an d 2 f rom 7.5.3 as follows:

v . . . . . . : ~ , .T^ , , Az an : h e r : a t e mc~Scd c f ~'z!ng ^ - :-a:.~a..~, . . . . h A ~ A c['.:mne7 ; ' c zzng g}'~tzm f~:" z zznglc ~ ! : ~ ' ~ z e ;'.a.th z n.~ft . . . . . .

the cffzzfi-'c area; ~f tkc ".'cnt connca t~r an~ ch':z:.~e 7 fluc :hal! ~c

c.udc.t, nor grzz.tzr "~.-~ zz'-zn +-r;:..z~ the ~ f t h.~-~ c-.:fizt are.7..

2. Delete Except ions No. 1 and 2 f rom 7.6.3(a) as follows: . . . . v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . for ~'z:.ag a::. ~n~;~.~ucJ

z.-ca of ~hc ",'c~t cGnnector c.-;~ ~.e g ~ - 'cnt shall be nc.~ Ic~ than

~ Z Z" ";7. Yh Y..'2 :,_P?_z'Sa'~.'?:, Y: TF2.'~7~YT_ZL"_C ~'_ ~2-£_~2-.72] . . . . . . . .

ccmb'.:~-'-cn z)-~te;',,, aF~l!^--nce: :'..~'! be z 'zcd "n aczcr~^~cc ;'-dz P=r: 1-! cr cfizcr aF~ro; 'cd c:;g: .zcer 'ng mc'~hod~.

effective area of ~ c vent zka!! ~c no t !ca: ~han tkz .xrcz. of file

. . . . . . . . . . . . . . . . . . . . , ; c r ' -~ n ~.z:,:tcd czm~::zfic= z~vtc,".,

SUBSTANTIATION: Except ions No. 1 and No. 2 to Sections 7.5.3 and 7.6.3(a) o f the IFGS conflict with Section 501.13.2 o f the IFGC.

Section 501.13.2 states tha t sizing o f Category I Appliance Vent ing Systems shall be in accordance with 501.13.2 of the IFGS. Section 501.13.2 of the IFGS contains the Category I Appl iance Vent ing Tables and co r respond ing notes to the tables. This section does no t include the ou tda ted and overly simplif ied except ions fo u n d in Sections 506.5.3 and 506.6.3(a) of the IFGS. These except ions do not con fo rm to the research and compu te r mode l i n g d o n e on Category I Appl iance Vent ing Systems.

It appears tha t this commi t tee has been able to choose which parts of NFPA 54 to include in the IFGS. We are proceeding with the assumpt ion tha t this commi t tee can delete i tems f rom the IFGS as well.

. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-91 (Log #A71). The commi t tee believes tha t the Except ion No. 2 is needed as revised. The commit tee believes tha t Except ion No. 1 is n e e d e d for single appl iance installations.

6 7 3

NFPA 54 - - A99 ROP


AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rbead, White

(Log #A105) 54/Z223.1- 94 - (7.5.4): Reject SUBMITTER= David Rock, City of Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Delete 7.5.4 as follows:

7.5.¢ ! a spccSan af O.~'mnc)~.

~(_) . . 7Z:~. " : - :~'3.~L'2^T." 3 T ~ ; : ; ~ 7 . ~ ' : . ' : : : : ~ : . : . ' : . ' . : C : . ~ : . ~ ' a ; 'cat

exam. . . . . . to . . . . . . . ~.h . . . . . v" - v ~" .~ . . . . . . , . . . . . . . . fr . . . . ~ k ~ . . . . . * : . . . . . .4 . l . ~ l l I ~ ^ ~ I . . . . A I g . . . . , I . . . . I . . . . . . .41 £ . . . . . . + : ~ -

s c l ! d a m !!qu!d fucl b u m ' n g a p p l ' ~ c c ; or fircp!acc;. Excep'.2cr.: x .~c rc pc rm ' t t cd by ~ c au~2:cr'ty ! : :Cng jurL~.5:.ct'an,

. . ? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )(~" . . . . . . . . . . . . . . . . . c c~ :..~spcc'4~. rc':ea'.s 4~:: am c:::.s'4mg . . . . . . . . . . ~ . . . . . . . .

Smr~dard fa r C'a:.mnc)~, F!rcp!ac~, Vc.~'~, a n d So!:.d F'ac! B'ar~4~.g Appli ~ r v . s 0 1 1 . ~ M I . . . . MI o k ~ l l a n t e s . . . . . . . . . . . cr lc.c~A b u ! ! ~ n g . . . . . . . . . . . . . . . be

S'iYi~,¥da~(T'~Ti~g"i~ipe';:6~on~0T~l;im'neys is.already c o v e r e d in more detail in Section 501.15 of the IFGC. Section 501.15 in the IFGC is identical to c u r r e n t IMC language including the 1997 supp lement . If Section 7.5.4 is no t removed fi 'om the IFGS the two sections will be in conflict. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T he commi t tee believes tha t tbe coverage is needed in d ie National Fuel Gas Code.. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATWE: 21 NOT RETURNED: 3 Bigelow, Rbead, White

(Log#A141) 54/Z223.1- 95 - (7.5.4): Reject SUBMITTER: Steven Shapiro, . H a m p t o n Virginia RECOMMENDATION: Delete 7.5.4 as follows:

7.5A I r . z p c c d ~ c.f Cb.!mac)~. (a) .gore.re rcp!~.c'L~g ~..~ cx:.~'4ag uppl:.mnzc c.r cc=r~cz'4ng u ; ' ca t

obgtruc~c.~.g - - A .t.~,, k _ . , . . . . n : ¢ . . . . ; . . . . i.. u s c ~ f~r ":c~t~ug

E~cep'2c~: ~?.n.:c=c ~ c : m ' t t c d by fi:c :ufi'.c:'t:." ! : a : ' : g j u r ' : d ' c~ : := , c~:i:.fir.g c! ' imncya a~.:v2! bc pzrm':*.tzd t.~ !~^d:c "..~.:'r ".:at can 'dn 'aed ;':l~cn a.-~ - v v . . . . . . . ! s rc 2.cod ~ } ' ~ . ~ v v . . . . . . . . . . . . . . . . . . zt.~,

+ : ~ l . * l . , ~ I ~ ^ A , . , I . . . . . + : . . . . .

(c) W!:c~ :mspcc*4o~. :c;'ca!s fi~at a~. cx 's t i~g c h ' m ~ c y :s n e t sz~c "^- 4;c "=~cadcd upp!'c~:2oa, "t :bz!! bc top--red, - ^~" : " , : ~ a

p! . . . . . . . . ,.: . . . . . . . . . . ¢^_~ .^

A ~ , : . . . . . , ~ v o D ~ . o* ~ !oc~l Su ' !d!ag c~dcs, a~'~d :Sall be

SUBSTANTIATIONS': Inspect ion o f ch imneys is already covered in more detail in Section 501.15 of the IFGC. Section 501.15 in tile IFGC is identical to cu r ren t IMC language inc luding file 1997 supp lement . If Secdon 7.5.4 is no t removed f rom tile IFGS the two sections will be in conflict. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e text is needed in the National Fuel Gas Code. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rbead, White

(Log #CP5) 54/Z223.1- 96 - (7.5.4): Accept SUBMITTER: RECOMMENDATION: Revise 7.5.4 to read:

(a) Before replacing an exist ing appl iance or connec t ing a vent connec to r to a ch imney, the ch imney passageway shall be examined to ascertain tha t it is . . . . . . ,.. ; :~â clear and free of

obstruct ions and shall be c leaned if previously used for vent ing solid or l iquid fue l -burn ing appl iances or fireplaces.

(b) Chimneys shall be l i n e d i n accordance with S tandard for Chimneys , Fireplaces, Vents, a n d Solid Fuel -Burning Appliances, NFPA 911, or local bui ld ing codes.

Except ion . . . . . . . . v . . . . . . . . . . . l . . . . . . . . . . . J . . . . . . . t, J . . . . . . . . . . t exist ing ch imneys shall be pe rmi t t ed to have their use cont inued when an appl iance is replaced by an appl iance of similar type, i npu t rating, and efficiency.

R e n u m b e r (b) and (c) S U B S T A N T I A T I O N : The commi t tee believes tha t spedf ic approval by the author i ty h a t i n g jur isdic t ion shou ld no t be required. The pa rag raph is split to clarify the commit tee ' s in tent tha t the except ion applies to l in ing only. COMMITTEE ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 2 1 N O T RETURNED: 3 Bigelow, Rhead, Whi te

(Log #A72/N43) 54/Z223.1- 97- (7.5.5): Accept in Principle SUBMITTER= Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Clause current ly references "(see 7.10.4)", change to "(7.10.5)". S U B S T A N T I A T I O N : Correct what is believed to be editorial error. COMMITTEE ACTION: Accept in Pr indple .

J T h e pa ragraph has been relocated, which accompl i shed the intent . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP12) 54/Z223.1- 98 - (7.5.5, 7.10.4 (a) and (b), 7.10.5): Accept SUBMITTER= National Fuel Gas Code Commit tee ' RECOMMENDATION: 1. Relocate 7.10.4 (a) a n d (b) an d 7.10.5 to 7.5.5.

2. Revise 7.5.5 by de l edng "(See 7.10.4)". S U B S T A N T I A T I O N : The text is relocated to the p rope r location. COMMITTEE ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 21 N O T RETURNED: $ Bigelow, Rhead, White

(Log #A106) • 54/Z223.1- 99 - (7.5.7): Reject SUBMITTER: David Rock, City of Port land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Delete 7.5.7 as follows:

7.5.7 ~cza=cu:s. '?,~crc a c!~!mnc 7 ~hat fc:va.crl 7 ca :~cd flue

v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . t~- . . . . . . . t, . . . . . . . . be . . . . . . . . . . . . . . vv . . . . e~ . . . . . . . . . . - . . . . x . . . . . . z [3 . . . . . the . . . . . . . . r~ . . . . . . . . . . . . . C . . . . . . . . . 1 . . . . . . . v ' ~ * * * n g -

S U B S T A N T I A T I O N : Section 7.5.7 in the IFGS requires cleanouts to be installed at least 12 in. below the lowest ch imney inlet. Section 501.15.3 of die IFGC requires only a 6 inch separat ion. The 6 in. r e q u i r e m e n t is consis tent with o ther mode l codes inc luding Section 801.14 o f the IMC. The 6 in. r e q u i r e m e n t is more realistic a n d reasonable in actual installations. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commit tee believes that the text in n e e d e d in the National Fuel Gas Code. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


54/Z223.1- 100- (7.5.7): Reject SUBMITI'ER: Steven Shapiro, Hampton Virginia RECOMMENDATION: Delete 7.5.7as follows:

• 6 7 4

(Log #A140)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I . . . . . . E I 3 E ~ I 1 1 ~ . . . . . . . .

FZXL,,Z3"-^':TL'Z-2~L\:L2"7. L7 , : =2 ;'~".2 W'~X~Z'C ~.L,T:Y.~.°~ ;:: .^~.'2322 "..T 3 ~ 2 : . . : : ' : % " C : : . . ~ ' . ~ : ~ , L " 2 2 - 2 : ~ \ . . . . . . . . . . . . . .

N F P A 5 4 - - A 9 9 R O P

SUBSTANTIATION: SecOon 7.5.7 in the IFGS requires d e a n o u t s to be installed at least 12 in: below the lowest ch imney in l e t - Section 501.15.3 o f the IFGC requires only a 6 in. separation. T h e 6 in. r e q u i r e m e n t is consis tent with o ther mode l codes inc lud ing Section 801.14 of the IMC. The 6 in. r e q u i r e m e n t is more realistic and reasonable in actual installations. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e commi t tee believes tha t the text in n e e d e d in the National Fuel Gas Code.

NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 V O T E ON C O M M I T T E E ACTION:


(Log #CP6) 54/Z223.1- 101 - (7.5.7): Accept SUBMITTER: National Fuel Gas Code Commi t t ee RECOMMENDATION: Revise text as follows:

7.5.7 Cleanouts. Where a ch imney that formerly carried flue products f rom liquid or solid fue l -burn ing appl iances is used with an appl iance us ing fuel gas, an accessible c leanout shall be provided. The c leanout shall have a tight-fitting cover and be installed so its uppe r edge is at least 12 ~ . (~0 cm) 6 in. below the lower edge of the lowest ch imney inlet opening. S U B S T A N T I A T I O N : T he exper ience o f commi t t ee m e m b e r s is that a 6 in. space between the ch imney inlet and the c leanout is sufficient. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


I appl iances tha t bu rn gas. Do no t connec t to soli d or liquid fuel- bu rn in~ appl iances or indnera tors . " SUBSTANTIATION: Installation of gas vents inside masonry chimneys presents un ique chal lenges to the installer. Some of the special cons idera t ions are:

1. The need to clean and inspect the ch imney prior to the installation.

2. Special parts requi red for the installation (proper m e t h o d of suppor t ) - mos t gas vents installed within masonry ch imneys end up be ing suppor t ing up t he tee sect ion or elbow where it passes the masonry wall and of ten we see tha t the tee or elbow has broken due to the weight imposed.

3. How is the vent to be sealed at the top (closing off the area between the vent and t h e chimney, walls) to prevent rain, debris and animals f rom enter ing the chimney.

4. A warning tha t the space a r o u n d the vent should no t be used to vent ano the r appliance.

5. A warning a n d label tha t this ch imney can now vent Category 1 gas appl iances only.

All of this informat ion shou ld be inc luded in the manufac tu re r ' s installation instructions. The re is no valid reason to cont inue to permi t the installation of gas vents in masonry chimneys outside the scope of thei r installation ins t ruct ions and listing. Th e re are n u m e r o u s products , bo th gas vents and a l u m i n u m liners, specifically listed for installation in masonry chimneys. In all o ther instances, the National Fuel Gas Code requires gas vents to be listed and installed accord ing to the installat ion instruct ions. It is t ime for the commit tee to require tha t same for gas vents installed within masonry chimneys. COMMITTEE ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigeiow, Rhead , Whi te

(Log #A73/N44) 54/Z223.1- 102- (7.6.1 (c)) : Accept in Principle SUBMITTER: Glen Ed~gar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

(c) A gas vent passing t h rough a roof shall ex tend t h r o u g h the entire roof f lashing, roof jack, or roof th imble and be te rmina ted wit|l a listed te rmina t ion can. S U B S T A N T I A T I O N : T h e inclusion of the word "entire" would r educe / e l im ina t e an i mprope r and potentially d a n g e r o u s installation practice where some installers ex tend the vent up only slightly above the roof and end it within the flashing, t hen apply a non-wind tested rain cap to the top of the flashing. Such practice violates paragraph 4.4 of the UL441 Standard for gas vents in that it allows flue gases to come in direct contact with the galvanized steel f lashing (which does no t have adequa te corrosion resistance for such exposure) . Such practice also provides for improper , potentially dange rous vent ing since effective stack act ion can be lost resul t ing in loss or reduct ion of capacity, p roducts of combus t ion leaking back into the area benea th the flashing, etc.

The proposed addit ional text at the end o f the s t a tement would help el iminate the use o f non-listed ven t t e rmina t ion caps with Type B gas vent. All listed Type B gas vent caps have been tested for draft loss and wind effects per the UL 441 Standard and therefore are m u c h less p rone to experiet~cing p rob lems caused by the effects of winds. COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: T h e proposal is accepted and te rminat ion is left to 7.6.2. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


( Log #A90/N22) 54/Z22g.1- 103 - (7.6.1(e)) : Accept SUBMITTER: James P. Brewer, Nat'l Ch imney Sweep Guild RECOMMENDATION: Substitute the following text in Section 7.6.1 (e)

(e~ Gas vents installed within masonrv ch imneys shall be installed in accordance with the te rms of their listin~ and the manufac tu re r s ' installation instruct ions. G-as vents installed within masonry chimneys shall be identif ied with a n e r m a n e n t label installed at the no in t where the vent enters tl~e chlmnev. The label shall contain the followin~ language: "This tras vent is for

(Log #A124) 54/Z223.1- 104 - (7.6.1(e)): Accept in Principle SUBMITrER: David Rock, City of Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Revise Sect ion 7-6.1 (e) as follows:

(e) An u n u s e d ch imney flue or mason ry enclosure shall be permi t ted to be used as a passageway for installation of a gas vent when the ~ vent is listed and labeled for use in ch imney flues an d mason rv enclosures . SUBSTANTIATION: Gas vents installed in ch imney flues an d masonry enclosures are m o r e subject to damage f rom corrosion than B-vents installed in combust ib le chases. The suppor t o f a gas vent ing system installed in a ch imney flue requires addit ional considera t ion and testing. B-vents tha t are only listed to UL441 have no t been evaluated for suppor t within a ch imney flue.

T h e installation instruct ion for b-vents evaluated only to UL441 do no t explain the installation of B-vent within ch imney flues or masonry enclosures. Several B-vent manufac tu re r s have tested an d listed their B-vent systems to UL1777, which is the s tandard for liners. This code change would encourage the r ema in ing manufac tu re r s of B-vent to test their products to UL1777 a n d to revise their installations ins t ruct ions to show the installation of B- vent in a ch imney or masonry enclosure. COMMITTEE ACTION: Accept in Principle. Revise Except ion No. 2 to read:

Except ion No. 2: As an al ternate m e t h o d for sizing a ch imney vent ing system connec ted to m~r= ~.=.'= ~r.= two appl iances , all with draft hoods, the effective area of the ch imney flue shall be not less than the a r ~ of the I=-gegt larger : 'eat c2e.'=ect~r draft h o o d outlet plus 50 percen t of the area of the smaller . . . . . . . . . . . . . =~!la~ ~r draf t h o o d outlet, no r greater t h a n seven t imes the ;m=!!czt smal ler draf t h o o d outlet area. COMMITTEE STATEMENT: T h e proposal is accepted and te rminat ion is left to 7.6.2. Refer to Action on Proposal 54-103 (Log #A90/N22) . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: $ Bigelow, Rhead , Whi te

COMMENT ON AFFIRMATIVE: BURNSIDE: Proposal 54-104 (Log #A124), the Commi t t ee

Action a n d Sta tement , are no t related to the Reco m m en d a t i o n .

6 7 5

NFPA 54

(Log #A52) 54/Z223.1- 105 - (7.6.2(b)): Reject SUBMITTER: David Rock, City of Port land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Revise as follows:

(b) A Type B or a Type L gas vent shall te rminate at least 5 6 f t ( t ~ 1.8 m) in vertical he igh t above the h ighes t connec ted e q u i p m e n t draf t hood or flue collar. SUBSTANTIATION: Section 7.6:2(h) is current ly in conflict with the vent sizing tables in Part II which begin with a m i n i m u m vent he ight of 6 ft. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: There is no conflict in the Code. The vent sizing tables do no t prohibi t 5 ft heights. They can be calculated us ing eng inee r ing methods . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A126/N61 ) 54/Z223.1- 106 - (7.6.3 Except ion No. 1 ): Reject SUBMITTER: Allen L. Ru tz /Lar ry Brand, Ba t te l l e /GRI RECOMMENDATION: Revise text as follows:

"Exception No. 1: AS an al ternate m e t h o f f f o r sizing a gas vent connec ted to more than one draft hood-equ ipped appliance, the effective area of the vent shall be not less than the largest vent connec tor plus 50 pe rcen t of the areas of addit ional draft hood outlets, nor greater than ;cvca t 'mc : 15 t imes the smallest draft hood outlet area. A m i n i m u m of one foot of ventconn¢q$o~" rise shall be Drovided directly above the draft hood outlet. Vents serving...". SUBSTANTIATION: Recent GRI research on the Seven-Times Rule was conduc ted us ing mode l ing and exper imenta l analysis. The results, to be d o c u m e n t e d in a GRI Topical Report , reveal the impor tance of vent connec to r rise for the vent to properly pr ime when the vertical vent is of a larger flow area than the vent connector . Wi thout adequate rise directly above the draft hood outlet, the vent may have difficulty establishing adequa te draft. This si tuation is especially critical when the vertical ven t flow area is m u c h larger t han tha t of the vent connector . Ensur ing adequa te rise directly above the draft hood out let reduces p r iming t ime and associated spillage o f combus t ion products .

For Type B vents, if a m i n i m u m of one foot of rise is provided above the draft hood, the area ratio limit may be ex tended to "fifteen times" without causing excessive spillage or condensat ion . For masonry chimneys, excessive condensa t ion may result if the area ratio exceeds "seven times," so the cu r ren t a rea ratio limit is main ta in ed. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: AS the research is no t complete, the proposal is p remature . T h e proposal would establish a m i n i m u m of 1-ft of rise for all installation, which can be an unnecessary hardship . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A74/N45) 54/Z223.1- 107 - (7.6.3 Except ion No. 2): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Delete entire Exception. SUBSTANTIATION: This is a "rule of t humb" m e t h o d of gas vent sizing which works for some applicat ions but definitely does not work for all appl icat ions as one migh t expect a rule-of- thumb should. This rule does not address the need for connec to r rise and results in insuff icient capacity when a larger n u m b e r of appl iances are installed on a relatively shor t c o m m o n vent. The rule shou ld e i ther "work" all the t ime, be modif ied to do so, or be el iminated. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-109 (Log #A77/N40) . The commit tee believes that the Exception is n e e d e d as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


A99 ROP

(Log #A76/N46) 54/Z223.1- 108 - (7.6.3 Except ion No. 2): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise Except ion to modify the last s t a t emen t as follows:

Except ion No. 2: As an al ternate m e t h o d for sizing a gas vent connec ted to more than one draf t hood-equ ipped appliance, the effective area of the vent shall be no t less than the area of the largest vent connec to r plus 50100 pe rcen t of the areas of addit ional draft h o o d outlets, no r greater than seven t imes the smallest draft h o o d out let area. Vents, serving fan-assisted combus t ion system and draft hood -equ ipped appliances, shall be sized in accordance with Part 11 or o ther approved eng ineer ing me thods . SUBSTANTIATION: This p roposed revision to the "rule of t humb" m e t h o d of gas vent sizing is i n t ended to significantly increase the percen tages of installations in which it will lead to proper sizing. The existing rule may work for some applications but definitely does no t work for all applicat ions and a lmost never works for 4 or more appl iances with a low overall vent height . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-109 (Log #A77/N47) . The commit tee believes that the Except ion is n e e d e d as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITrEE ACTION:


(Log #A77/N47) 54/Z223.1- 109 - (7.6.3 Except ion No. 2): Accept in Principle SUBMITTER: Glen Edgar, Selldrk Metalbestos RECOMMENDATION: Revise as follows:

Except ion No. 2: As an al ternate m e t h o d for sizing a gas vent connec t ed to more than one but no t more than thl 'ee draf t hood- equ ipped appl iances, file effective area of the vent shall be not less than the area of the largest vent connector plus 50 percen t of the areas of addit ional draft h o o d outlets, no r greater than seven t imes the smallest draft hood out let area. Vents, serving fan-assisted combus t ion system and draft hood-equ ipped appliances, shall be sized in accordance with Par t 11 or o ther approved eng ineer ing methods . W h e n sized in such manne r , the he igh t o f the vent shall be at least 15 ft. Gas vent sizin~ per this m e t h o d sh~ l no t be

v -

nermi t ted for vents with shor ter height . SUBSTANTIATION: This p roposed revision to the "rule of t humb" m e t h o d of gas vent sizing is i n t ended to significantly increase the percen tages of installations in which it will lead to proper sizing. The existing ru le may work for some appl icat ions but definitely does no t work for all applicat ions and a lmost never works for 4 or more appl iances with a low overall vent height . COMMITTEE ACTION: Accept in Principle. Revise Exception No. 2 to read:

Except ion No. 2: AS an al ternate m e t h o d for sizing a gas vent connec t ed to m~re t h : = ~nc two appliances,-a#i- with draft hoods, the effective area of the vent shall be no t less than the area of the • --~,~-~n . . . . . . lar~er_ ve~t c~n~ect~r draft hood outlet plus 50 percen t of the area of the smaller - . . ~ " -v r .~ fi'-c a~P.=~ ar draft h o o d outlet, no r greater than seven t imes the zm~!ezt smal ler draft hood outlet a r e a .

Vents serving fan-assisted combus t ion system appliances, or combina t ions of fan-assisted combus t ion system and draft hood- equ ipped appliances, shall be sized in accordance with Part 11 or o ther approved eng inee r ing methods . COMMITTEE STATEMENT: The concept of the proposal is accepted, bu t is restricted to two appliances. This retains the rule of t h u m b for the vast majori ty of applicat ions in its s implest form. The commit tee agrees that the cur ren t rule of t h u m b mus t be restricted. The te rm flue collar is de le ted as it is no t appropr ia te NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A104) 54/Z223.1- 110 - (7.6.4 and Figure 14): Reject SUBMITTER: J o h n R. Mueller, The Peoples Gas Light and Coke C o m p a n y RECOMMENDATION: Delete second pa ragraph and Figure 14 as follows:

22! g ~ "Jti!'za'-c= c~'d 'Fmc=t cc.qacztzd t= *~e comm c: , vent

. . . . . . . . . . . . . . . . . . . . . . . . 1-. . . . . . . . . . . . . . . . . . . . ,t . . . . gu of

6 7 6

N F P A 5 4 - - A 9 9 R O P

. ^ _ g . . . . : . . . . . . . :,^.: . . . . a a: , . . . :^_ pF !-

. . . . . . . . . . , . . . . . . . . . . . . . . , . . . . . . . . . . . : ! r ~z.~t ": :.or ::: : ~ f rom

Figure ! A. P!a= V'c'v of P . . . . :^~ ~^p:.-a~c.n .x?-:~o~ f~.:

S U B S T ~ I T I A T I O N : T he requ i rements no t to use air f r om the habitable space and to separate the e q u i p m e n t f rom the habitable SiPwaCe are too restrictive, too costly and no t necessary for safety.

enty years of exper ience with many installations taking air f o rm the habitable space has shown this to be safe practice. B-vents have main ta ined their s tructural integrity over this t ime. C O M M I T T E E A C T I O N : Reject. COMMITTEE STATEMENT: No technical in format ion is provided to substant iate the delet ion. The commi t t ee believes that this r e q u i r e m e n t is n e e d e d for safety. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITT E E ACTION:


EXPLANATION OF ABSTENTION: BUCHAL: The rationale for the provisions of 7.6.4 and Figure 14

,as written is unknown to this writer. Fur ther c o m m e n t is no t appropr ia te until that rat ionale is provided.

(Log #A53) 54/Z223.1- 111 - (7.7): Reject SUBMITTER: Robert Miner , Pikes Peak Regional Bldg Dept. RECOMMENDATION: Delete 7.7 in its entirety. S U B S T A N T I A T I O N : T h e use of single wall metal pipe for appl iance vent ing is general ly no t allowed for listed appl iances and it use where allowed shou ld not be encguraged . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: No substant ia t ion is provided on the lack of safety in the use of Single Wall Metal Pipe. Single-wall pipe has many uses for larger e q u i p m e n t and the commit tee believes tha t it is needed . While the commit tee is aware tha t single-wall metal pipe is no t widely used for residential appliances, it is used. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON C O M M I T T E E ACTION:


Log #A70) 54/Z223.1- 112 - (7-7, Table 11-10): Reject SUBMITTER: David Rock, City o f Por t land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: Delete Table 11-10 a n d Section 7-7 in its entirety. S U B S T A N T I A T I O N : Section 7-7 deals with single-wall metal pipe used as a vent system. This sect ion is in conflict with Section 503.1 (IFGC) which requi res all vent systems to be listed and labeled. Most codes allow single wall vent connec to r s as provided in Section 506.10 (IFGC). Most model codes do no t allow light gage metal vents. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: No substant ia t ion is provided on the lack of s~ffety in the use of Single Wall Metal Pipe. Single-wall pipe has many uses for larger e q u i p m e n t and the commit tee believes tha t it is needed . While the commit tee is aware tha t single-wall metal pipe is no t widely used for residential appliances, it is used. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITT E E ACTION:


It appears tha t this commi t tee has been able to choose which parts of NFPA 54 to inc lude in the IFGS. We are p roceed ing with the a s sumpt ion tha t this commi t tee can delete i tems form the IFGS as well. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: No substant ia t ion is provided on the lack o f safety in the use of Single Wall Metal Pipe. Single-wall pipe has m a n y uses for larger e q u i p m e n t a n d the c o m m i t t e e believes that it is needed . While the commi t tee is aware that single-wall metal pipe is no t widely used for residential appliances, it is used. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A109/N48) 54/Z223.1- 114- (7.7.2(c)): Reject SUBMITTER: Glen Edgar, Selldrk Metalbestos RECOMMENDATION: Revise as follows:

(c) 3 ~ =Fpro;'c~ :.7.p A listed gas vent can or roof assembly shall be a t tached to the t e rminus of a single-wall metal pipe. S U B S T A N T I A T I O N : The term "approved cap" is too loose of terminology. Since these (single wall metal pipe) systems are already p rone to weak draft due to excessive hea t loss, the effects of wind on a non-wind tested te rmina t ion cap are u n k n o w n and can, often do, lead to imprope r vent ing / spillage. Use of a listed gas vent cap would help reduce this l ikel ihood s ince such caps have been wind tes ted to assure, no t only tha t a wind will n o t cause a downdraft , bu t also that it will actually create an updraf t u n d e r mos t condi t ions. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commi t t ee is conce rned about requi r ing the use of listed ven t caps with unl is ted single-wall metal

~p e vents. UMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24

VOTE ON C O M M I T r E E ACTION: AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, Whi te

(Log #A112/N49) 54/Z223.1- 115 - (7.7.3(a)): Reject SUBMITTER: Glen Edgar , Selkirk Metalbestos RECOMMENDATION: Revise as follows:

"Single-wall meta l pipe shall be used only equ ipped appl iances a n d only when it e x t c n ~ f~.r r~:.x: directly f rom the space in which t he gas utilization e q u i p m e n t is located t h rough the roof or exterior wall to the o::=cr :L- a tmosohere ." S U B S T A N T I A T I O N : Today's h ighe r efficiency fan assist appl iances have been demons t r a t ed to be more corrosive to vents than the older, draft hood equ ipped appliances. As such they shou ld no t be permi t ted to be installed with single wall metal pipe, unless such pipe is a listed system (i.e., special gas vent), m a d e with very corrosion resistant materials which can hand le the condensa t ion . This p roposed revision would clarify this limitation~ Current ly it is unc lear whe ther or no t single wall metal pipe is permi t ted for use with fan assist appliances. It shou ld n o t be. Chang ing the word "outer air" to "atmospheric" is r e c o m m e n d e d for clarity. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposal would be in conflict with Table IX. It would also be restrictive as it would n o t pe rmi t single-wall metal pipe use in mechanica l draf t systems. NUMBER OF COMMITI'EE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A54) 54/Z223.1- 113 - (7.7, Tables 11-5 and 11-10): Reject SUBMITrER: David Rock, City of Port land, OR RECOMMENDATION: Delete Table 11-5, Table 11-10 and Section 7-7 in its entirety. S U B S T A N T I A T I O N : Section 7.7 deals with single-wall metal pipe used as a vent system. This sect ion is in conflict with 502.1 of the IFGC which requires all vent systems to be listed and labeled. Most model codes allow single.wall vent connec tors as provided in Section 506.10 of the IFGS. Most model codes to no t allow light gage metal vents. Some model codes do allow 10 gas (heavy wall) metal ch imneys for some commerc ia l and industrial applications.

(Log #A127/N62) 54/Z223.1- 116 - (7.7.4(a)3): Reject SUBMH~rER: Allen L. Ru tz / I2x ry Brand, Ba t te l l e /GRI RECOMMENDATION: Revise text as follows:

3. For a v e n d n g s y s t e m for more than one appl iance in a single room, all having draft hoods, the area o f the pipe shall no t be less than the area o f the largest connec to r plus 50 percen t o f the area of the addi t ional draft hood outlets. The vent a rea shall no t be greater than seven t imes the smallest draft hood outlet area. A m i n i m u m of one foot of vent connec to r rise shall be provldgc[ directly above the draft hood outlet.

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SUBSTANTIATION: Recent GRI research on the Seven-Times Rule was conducted using model ing and experimental analysis. The results, to be documen ted in a GRI Topical Report, reveal the importance of vent connector rise for the vent to properly prime when the vertical vent is of a larger flow area than the vent connector . Without adequate rise directly above the draft hood outlet, the vent may have difficulty establishing adequate draft. This situation is especially critical when the vertical vent flow area is much larger than that of the vent connector. Ensuring adequate rise directly above the draft hood outlet reduces pr iming time and associated spillage of combust ion products. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: As the research is not complete, the proposal is premature . The proposal would establish a m i n i mum of 1-ft of rise for all installation, which can be an unnecessary hardship. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A113/N50) 54/Z225.1- 117 - (7-7.4(a).5): Accept SUBMITrER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Delete entire section and replace with:

"Common venting is not oerrnitted when usin~ single wall metal pipe." SUBSTANTIATION: This is a "rule of thumb" me thod of vent sizing which may work for some applications but definitely does not work for all applications. Since single wall metal pipe is acknowledged to be associated with large heat loss from the flue gases leading to leak natural draft, excessive condensat ion and severe corrosion potential , this rule of t h u m b method of selecting a size should no t be permi t ted . COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: BUCHAL: Insufficient substantiation has been provided to

preclude the use of single wall pipe for common venting applications. This may be installation restrictive for some medium heat and other industrial applications.

(Log #A114/N51) 54/Z225.1- 118- (7.7.4(a).5): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

5. For a venting system for more than one appliance, but no more than three in a single room, all having 12 in. or l a ~ e r draft hoods, the ,area of the pipe shall no t be less than the area of the largest connector plus 50100 percent of the area of the additional draft hood outlets. The vent area shall not be greater than seven times the smallest draft hood outlet area. Common ventin~ shall pot be permit ted for smaller appliances or shor ter heights.- SUBSTANTIATION: These proposed revisions to the "rule of thumb" method of vent sizing for single wall pipe are in tended to increase the percentages of installations in which it will lead to safe venting. The existing rule may work for some applications but definitely does not work for all applications and almost never works for 4 or more appliances and a low overall height.

Single wall metal pipe is acknowledged to be associated with large heat loss from the flue gases leading to weak natural draft, excessive condensat ion and severe corrosion potential. However, since beat loss is generally acknowledged to be not as large a factor in p roper draft establ ishment for larger d iameter vents, this proposed modified rule of thumb me thod of selecting a size would put a better set of constraints on it. The inclusion of the maximum of three appliances and a minimum 15 ft vent height again is a modification which leads to better likelihood that the rule will "work". COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z225.1-117 (Log #Al lS) which makes dais unnecessary. NUMBER OF COMM1TI'EE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATWE: 20 NEGATIVE: 1 NOT RETURNED: 5 Bigelow, Rhead, White

EXPLANATION OF NEGATIVE: " BUCHAL:. Due consideration should be given to the number of

appliances connec ted to a single wall vent. The criteria provided in the proposed coverage is less design restrictive than total prohibit ion of common venting yet places limits on type and number of appliances to be connec ted to a common single wall venting system.

(Log #N35) 54/Z225.1- 119 - (7.8): Accept in Principle SUBMITTER: Wilbur L. Haag, Jr . , A.O. Smith Water Products Co. RECOMMENDATION:. 1. Revise title of 7.8 to: Horizontal Vent Terminat ion.

2. Relocate 7.8(d) to 7.7 as 7.7.2. SUBSTANTIATION: 1. The proposed title will more accurately describe the content.

2. This will have related single wall metal pipe material in the same section. COMMITTEE ACTION: Accept in Principle.

I Revise title of 7.8 to read: Through the Wall Vent Termination. Relocate Section 7.8(d) to 7.7 as 7.7.2.

COMMITTEE STATEMENT: The proposal is accepted, and the title of 7.8 is revised to better reflect the content of the Section. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #CP10) 54/Z225.1- 120- (7.8 (b)) : Accept SUBMITTER: National Fuel Gas Code Commit tee RECOMMENDATION: Revise text as follows:

(b) T-heA mechanical draft venting system of other than ~ direct- vent ap~!'==cc type shall terminate at least 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally from, or 1 ft (30 cm) above any door, window, or gravity air inlet into any building. The bot tom of the vent terminal shall be located at least 12 in. (30 cm) above grade. SUBSTANTIATION: This will correlate the text with that of the captions used in Figure A.7.8 and add clarity. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 94 VOTE ON COMMITTEE ACTION:


(Log #CP9) 54/Z223.1- 121 - (7.8 (a)): Accept SUBMITTER: National Fuel Gas Code Commit tee RECOMMENDATION: Revise to read:

(a) A mechanical draf~ venting system shall terminate at least 3 ft (0.9 m) above any forced air inlet located within 10 ft (3.1 m).

Exceptions unchanged. SUBSTANTIATION: This will correlate with the text with that of the captions.used in Figure A-7.8 and add clarity. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A66) 54/Z223.1- 122 - (7.8(a) Exception No. 2): Accept in Principle SUBMITTER: Richard G. Tandy, York International RECOMMENDATION: Revise text as follows:

Exception No. 2 This provision shall no t apply to the separation of the :".:cu!=:Jng =': ":=!ct and integral condi t ioned air and combustion air inlet to the integral flue gas discharge of outdoor appliances. SUBSTANTIATION: Clarification is n e e d e d to prevent field modification of listed ou tdoor appliances to comply with this

rovision. OMMITTEE ACTION: Accept in Principle.

Revise Exception No. 2 to read: Exception No. 2: This provision shall not apply to the separation

of the ci=zx!:.'.~=g --r ":Act intem-M outdoor air inlet and flue gas discharge of listed outdoor appliances. COMMITTEE STATEMENT: The proposal is accepted with editorial revisions.

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(Log #N10) 54/Z223.1- 123 - (7.8(a) and (b), (f) (New)): Reject Note: This Proposal appeared as 54-67 which was held from the

Annual 96 ROC on Proposal 54-179. SUBMrrrER: Robert Hauserman, Connecticut Natural Gas RECOMMENDATION: Revise text'as follows:

1. 7.8(a) and (b) Maximum Btu allowance for these applications is 250,000 (or some reasonable amount).

2. (f) For sidewall venting of equipment over 250,000 Btu's installation must be done to prevent the recycling of vent gases in combustion air. Under no conditions should flue gases enter the building. SUBSTANTIATION: While the changes are to paragraph (c), it would be beneficial to address other paragraphs in this section. Recently we have experienced equipment (listed under Z21.13) ~ t h inputs ranging from 2,000-2,500 CFH being vented in accordance with Section 7.8. These are not listed as direct vent appliances, however, efficiencies are very high with air free CO levels very near the amount allowed by the standard. The amount and force of vent g~es has resulted in contaminated combustion air and CO levels of 15-20 PPM entering windows as far as 15-20 ft away. CO levels wary greatly (often exceeding allowable levels) depending on atmospheric conditions especially wind). It is my understanding that Section 7.8 was created to address difficult venting situations for residential and /o r small commercial installations. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Insufficient substantiation is provided to justify the change. Additional data and description of the sampling methods should be provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow, Rhead, white

(Log #A6) 54/Z223.1- 124- (7.8(b)): Reject SUBMITTER: Peterj . Phillip, Gas-Fired Products, Inc. RECOMMENDATION: Revase text as follows:

"The venting system of other than a direct vent appliance shall not terminate withinthe following distance from any window or door which can be opened in any building:

(i) 12 in. (300 ram) for inputs up to and including 100,000 BTU/h

(ii) 3 ft (1.2 m) for inputs exceeding 100,000 BTU/h (iii) 3 ft (1.2 m) from any gravity air inlet."

SUBSTANTIATION: a. Standardize with CAN/CGA-B149.1-M95', Natural Gas Installation Code of Canada.

b. During the heating seasou it is unlikely that a window could be open during the appliance's "on" cycle. If a door were open, the duration would not be enough to allow flue products of significant concentration to enter the building. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposal would eliminate the one foot above grade requirement which is needed. No substantiation isprovided for the changes in distances. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMFFrEE ACTION:


54/Z223.1- 125- (7.10.2(b)): Accept in Principle SUBMITTER: Steven Shapiro, Hampton Virgania RECOMMENDATION: Revise as follows:

(a) A vent connector shall be made of noncombustible corrosion-resistant material capable of withstanding the vent gas temperature produced by the gas utilization equipment and Of sufficient thickness to withstand physical damage.

(b) Vent connectors for residential-type appliances shall comply with the following:

1. Appliances Installed in ?.t'-~s Unheated Snaces. Vent connectors for listed gas appliances having draft hoods and appliances listed fro use with Type B gas vents that are installed in : . t~ . unheated Spaces. shall be of Type B or Type L vent material.

(Log #A138)

2. Appliances Not Installed in A t ~ = ~ Q . q g i . ~ l _ ~ g ~ Vent connectors for listed gas appliances having draft hoods and for appliances having draft hoods and equipped with listed conversion burners, which are not installed in at~5.~ unheated Spaces:shall be one of the following: SUBSTANTIATION: Similar winter temperatures can be expected in other unheated areas such as crawl spaces and garages. The use of single wall vent connectors in any unheated space could result in vent failure due to condensation or spillage resulting from excessive cooling of gases. This proposal is consistent with Section 804.2 of the IMC. COMMITTEE ACTION: Accept in Principle. Revise text to read as follows:

(b} Where the vent connector use for eas utilization enuiDment having a draft hood our for Gate, urn I annliance is located in or passes through an attic snace or other unconditioned area. that bortion of the vent connector shall be listed True B or Twe L vent material or listed material having euuiwalent insulation cn~lities.

(¢} Vent connectors for residential-type appliances shall comply with the following:

v

1. Vent Connectors Not Installed in Attics. Crawl Snaces or Other Conditioned Areas. Vent connectors for listed eas

v

anDliances having draft hoods and for anvliances having draft hoods and eouinned with listed conversion burners, which are not installed in attics~ cra~4 snaces, or other unconditioned areas shall be one of the following:

a. Type B or Type L vent material; or b. Galvanized sheet steel not less than 0.018 in. (0.46 ram) thick;

or c. Aluminum (1100 or 3003 alloy or equivalent) sheet not less

than 0.027 in. (0.69 ram) thick; or d. Stainless steel sheet not less than 0.012 in. (0.31 ram) thick;

o r

e. Smooth interior wall metal pipe having resistance to heat and corrosion equivalent to that of b, c, or d above; or

f. A listed vent connector. COMMITTEE STATEMENT: The intent of the original proposal is retained by the committee revisions which is to prevent the excessive cooling of flue gases in vents located in unconditioned locations. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITI"EE ACTION:


EXPLANATION OF ABSTENTION: BUCHAL: Abstention is based on inability to understand

proposed text. Editorial changes may be needed.

(Log #A55) 54/Z223.1- 126 - (7.10.2(b)): Reject SUBMITTER: David Rock, City of Portland (Oregon Mechanical Officials Association) RECOMMENDATION: Revise as follows:

(b) Vent connectors for residential-type appliances shall comply with the following:

1. Appliances Installed in At*Jc~ Unheated Snaces. Vent connectors for listed gas appliances having draft hoods and appliances listed fro use with Type B gas vents that are installed in att:~ unheated Spaces. shall be of Type B or TYi~e L vent material.

2. Appliances Not Installed in At'Scs Unheated Snaces. Vent connectors for listed gas appliances having draft hoods and for appliances having draft hoods and equipped with listed conversion burners, which are not installed in at~5~, unheated Spaces. shall be one of the following: SUBSTANTIATION: Similar winter temperatures can be expected in other unheated areas such as crawl spaces and garages. The use of single wall vent connectors in any unheated space could result in vent failure due to condensation or spillage resulting from excessive cooling ofgases. This proposal is consistent with Section 804.2 o f the IMC. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: The proposal would have the unintended consequence of prohibiting installations in unheated

aces that are not cold. ER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24


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(Log #A115/N52) 54/Z223.1- 127 - (7.10.2(b)1): Accept SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

1. Appliances Installed in Attics. Vent connectors for listed gas

~pyp liances having draft hoods and appliances listed for use with pe B gas vents that are installed in attics shall be of Type B , ~

Type L or listed vent material having equivalent insulating uualities. SUBSTANTIATION: The revision is intended to permit listed vent connectors employing equivalent insulating values to Type B and Type L to be used in attics. Previously no such products existed; now they do. Additionally this revision is necessary in order to correct the conflict which exists between the current text for 7.10.2(b)1 and clause 7.10.12. Current 7.10.12 permits such equivalent materials to be used in attics. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A116/N53) 54/Z223.1- 128 - (7.10.3(b)): Accept in Principle SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

(b) For a single appliance having more than one draft hood outlet or flue collar, the manifold shall be constructed according to the instructions of the appliance manufacturer. If there are no instructions, the manifold shall be designed and constructed in accordance with approved engineering practices. AS an alternate method, the effective area of the manifold shall equal the combined area of the flue collars or draft hood outlets and the manifold shall be located a min imum of l f o o t above the appliance outlets. SUBSTANTIATION: The revision is intended to address an existing fault in this rule of thumb sizing method in that it currently lacks any min imum connector rise specification. Without at least a min imum 1 foot connector rise, a manifold sized per this rule of thumb may have sufficient capacity yet spillage occurs at the draft hood due to insufficient connector rise. This modification would reduce the likelihood of such occurrences. COMMITTEE ACTION: Accept in Principle. Revise 7.10.3(b) to read:

(b) For a single appliance having more than one draft hood outlet or flue collar, the manifold shall be constructed according to the instructions of the appliance manufacturer. If there are no instructions, the manifold shall be designed and constructed in accordance with approved engineering practices. As an alternate method, the effective area of the manifold shall equal the combined area of the flue collars or draft hood outlets and the vent co~anectors shall have a minimum 1 ft rise. COMMITTEE STATEMENT: Accepted and revised for clarity. NUMBER OF COMMITTEE MEMBERS EHGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


( Log #A117/N54) 54/Z223.1- 129- (7.10.3(c)): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

(c) Where two or more gas appliances are connected to a common vent or chimney, each vent connector shall be sized in accordance with Part 11 or other approved engineering methods.

AS an alternative method applicable only there are no more than three a ~ l i a n c e s and when all of the aDoliances are draft hood- eauinned, each yent connector shaU have an effective area not less than the area of the draft hood outlet of the annliance to which it is connected and incornorate a minimum 1 foot connector rise. SUBSTANTIATION: :l'he revision is intended to address an existing fault in this rule of thumb sizing method whereby it currently lacks any min imum connector rise specification. Without a min imum 1 foot connector rise, a connector sized per the draft hood outlet diameter may be too small, resulting in spillage. Although this modification would not "guarantee" a properly sized connector (since even sized per the appliance outlet it may be too small if the overall height is minimal) it would reduce the likelihood of such occurrences for most systems. COMMITTEE ACTION: Reject.

COMMITTEE STATEMENT: No data is provided to demonstrate that a problem exists. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A119/N55) 54/Z223.1- 130- (7.10.3(d)): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Delete entire sectiofi. SUBSTANTIATION: This is a "rule of thumb" method of common vent connector and vent manifold sizing which works for some applications but definitely does not work for all applications. This rule does not address the need for connector rise and results in insufficient capacity when a large number of appliances are installed on a relatively short common vent. The rule should either "work" all the time, be modified to do so, or be eliminated. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-132 (Log #A122/N57). The committee believes that the Exception is needed as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A120/N56) 54/Z223.1- 131 - (7.10.3(d)): Reject SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise section as follows:

(d) Where two or more gas appliances are vented through a common vent connector or vent manifold, the common vent connector or vent manifold shall be located at the highest level consistent with available headroom and clearance to combustible material and shall be sized in accordance with Part 11 or other approved engineering methods.

As an alternate method applicable only where all appliances are draft-hood equipped, the effective area of the common vent connector or vent manifold and all junct ion fittings shall be not less than the area of tile largest vent connector plus 5~100 percent of the areas of additional flue collar outlets. SUBSTANTIATION: This proposed revision to the "rule of thumb" method of vent connec tor /mani fo ld sizing is intended to significandy increase the percentage of installations in which it will lead to proper vent sizing. The existing rule may work for some applications but definitely does not work for all applications and almost never works for 4 or more appliances with a low overall height. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Refer to Panel Action on Proposal 54/Z223.1-132 (Log #A122/N57). The committee believes that the ExceptiOn is needed as revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A122/N57) 54/Z223.1- 132 - (7.10.3(d)): Accept in Principle SUBMITTER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise secdon as follows:

(d) Where two or more gas appliances are vented through a common vent connector or vent manifold, the common vent connector or vent manifold shall be located at file highest level consistent with available headroom and clearance to combustible material and shall be sized in accordance with Part t l or other approved engineering methods.

As an alternate method applicable only where there are no more than three appliances and all appliances are draft-hood equipped, the effective area of the common vent connector or vent manifold and all junct ion fittings shall be not less than the area of the largest vent connector plus 50 percent of the areas of additional flue collar oudets and the height of the common vent shall be at least

v

15 ft. Common vent sizin~ oer this method shall not be permitted for smaller anDliances or shorter heights.

- - v

SUBSTANTIATION: These proposed revisions to the "rule of thumb" method of vent connector /mani fo ld sizing are intended to si .~hmificantly increase the percentages of installations in which it wall lead to proper vent sizing. The existing rule may work for some applications but definitely does not work for all applications

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NFPA 54 - - A99 ROP

and a lmost never works for 4 or more appl iances of relatively small BTU inputs a n d low overall height . COMMITTEE ACTION: Accept in Principle. Revise sect ion as follows:

(d) Where two or more gas appl iances are vented t h rough a c o m m o n vent connec to r or v e n t manifold, the c o m m o n v e n t connec tor or vent manifo ld shall be located at the h ighes t level consis tent with available h e a d r o o m and c learance to combust ib le material and shall be sized in accordance with Par t 11 or o ther approved eng inee r ing methods .

As an al ternate m e t h o d applicable only where there are two draft hood e u u i n n e d annl iances arid ~ 1 ' - - - - - - I . " . . . . . . . . ~ l . - - t . I~ ~ 1

. . . . : -~^~ the effective area o f the c o m m o n vent connec tor or vent manifold and all j unc t ion fittings shall be no t less than the area of the !azgc~t larger vent connec tor plus 50 percen t of the area of a~!*-c.".~2 the smalle~ draf t hood. COMMITYEE STATEMENT: T he c o n c e p t of the proposal is accepted, bu t is restricted to two appliances. This retains the rule of t h u m b for the vast majority of applicat ions in its s implest form. The commit tee agrees tha t the cu r ren t rule of t h u m b m u s t be restricted. The te rm flue collar is de le ted as it is no t appropr ia te NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: . 24 VOTE ON C O M M I T T E E ACTION:


(Log #N9) 54/Z223.1- 133- (7.10.3(d)): Reject Note: This Proposal appea red as 54-68 which was he ld f rom the

Annua l 96 ROC on Proposal 54-185. SUBMIIq 'ER: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Propose to change the words in the second pa ragraph which read:

"...shall no t be less than the area of the largest vent connec tor plus 50 pe rcen t of the areas of.. ." to:

"...shall no t be less than the combined areas of all vent connec tors or draft h o o d outlets. . ." S U B S T A N T I A T I O N : Same rationale as submi t ted for p roposed revision to paragraphs 7.5.3 Exception No. 2, 7.6.3 Exception No. 2, 7.7.4 Except ion No. 2. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e commit tee agrees with the submi t te r tha t the rule o f t h u m b shou ld be revised. Refer to Commi t t ee Action on 54-132 (Log# A122/N57) where the rule of t h u m b is revised. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A92/N21 ) 54/Z223.1- 134- (7.10.4(e) (New)): Reject SUBMITTER= Jame s P. Brewer, National C h i mney Sweep Guild RECOMMENDATION: Add the following new text to Section 7.10.4

(e~ When two or more appl iances located on different floors of il dwelling or bui ldin~ are connec ted to a single vent they shall conform to the r eou i rements of Section 7,6~4. S U B S T A N T I A T I O N : This proposal does no t add new requ i rements of the Code, it s imply alerts the user to the requ i rements of vent ing tha t relate to mult istory vent design. When looking for informat ion on mul t ip le appl iance vent ing systems the user will look to Section 7.10.4 and may overlook the impor tan t r equ i rements of Section 7.6.4. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: T h e paragraph has been relocated and the proposal is n o t needed . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #A137) 54/Z223.1- 135- (7.10.10): Accept SUBMITTER: Steven Shapiro, H a m p t o n Virginia RECOMMENDATION: Add (a) to read as follows:

(a) A vent connec to r shall be as shor t as practical and the gas utilization e q u i p m e n t located as close as practical to the ch imney or vent.

Replace (b) as follows:

(b~ Excent as nrovided for in Section 7.10.$. the m a x i m u m horizontal len~,tl~ o f a single wall connec to r shall be 75 ne rcen t of the he igh t o f the ch imney or vent. Excent as nrovided for a Section 7.10.$. t h e m a x i m u m horizontal lenc~h of a T rue B doub le wall connector shall be 100 ne r cen t of the heimht of the ch imney or vent. For a ch imney or vent system servin-~ mul t in le alanfiances. the m a x i m u m leng th of an individual connector , f o r m t_he appl iance out let to the Junction with the c o m m o n vent or ano thg r connector , shall be 100-nercent o f the he igh t o f the ch imney or v e n t .

SUBSTANTIATION: This l anguage is n e e d e d to prevent vent connec tor horizontal lengths f rom exceeding the total vent he igh t of a c o m m o n vent ing system. Wi thou t this l imitation, c o m m o n vent systems could be des igned with a natural draf t horizontal vent connec tor l eng th o f up to 18 ft and a total system vent he igh t o f only 6 ft. This p roposed l anguage is consis tent with Sectiofi 804.10.2 in the IMC 1997 supp lement . COMMITTEE ACTION: Accept . NUMBER OF COMMITFEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T F E E ACTION:

AFFIRMATIVE: 21 NOT RETURNED: $ Bigelow, Rhead, Whi te

(Log #A56) 54/Z223.1- 1$6 - (7.10.10(b)): Accept SUBMITTER: David Rock, City of Port land (Oregon Mechanical Officials Associat ion) RECOMMENDATION: D e l e t e 7-10.10 (b) and replace as fo II ows:

r ~ . ~ . ~ A ~ . . . . . : - ~ : ~ ' ~ ~7 . h : ^FF,:Mk,^ .^~.,__ :_ ~ 11, " ' ~

t - " . . . . . . v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b)" Excent as nrovi~ed for in Section 7.10.3. the m a x i m u m horizontal l e n ~ of a single wall connec to r shall be 75 oercen t o f the he igh t of the c h i m n e v o r vent. Exc/mt as nrovided for a Section 7.10.3. ~he m a x i m u m horizontal l eng th o f a "I;voe B doub le wall connec tor shall be 100 ne r cen t of the he igh t of the ch inmev or vent. For a ch imney o r v e n t system servin~ mul t in le applianc¢~, the m a x i m u m length o f an individual connector , fo rm the appl iance out le t to the iunct ion with the c o m m o n vent or a n o ~ ¢ r connector , shall be 100 nercen t o f the he igh t of the ch imney 91" v e n t .

SUBSTANTIATION: This language is needed to prevent vent connec to r horizontal lengths f rom exceeding the total vent he igh t of a c o m m o n vent ing system. Wi thou t dais l imitation, c o m m o n vent systems could be des igned with a natural draft horizontal vent connec tor length of up to 18 ft and a to ta l sys tem vent he igh t of only 6 ft. This p roposed language is consis tent with Section 804.10.2 in the IMP 1997 supplement . C O M M I T r E E ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: $ Bigelow, Rhead, Whi te

(Log # C P l l ) 54/Z223.1- 137- (7.10.12): Accept SUBMITTER: National Fuel Gas Code Commi t t ee RECOMMENDATION: Revise text to read:

7.10.12 Location. Where the vent connec tor used for gas utilization e q u i p m e n t having a draft h o o d 'or for Category I appl iances is located in or passes t h r o u g h an attic, crawl space, or o ther area tha t can be cold, tha t por t ion of the vent connector shall be of listed double-wall Type B, o* Type L vent material or listed material having equivalent insulat ion qualities. S U B S T A N T I A T I O N : Revised for consis tency with the action taken on 7.10.2(b) in AI15/N52. COMMITYEE ACTION: Accept . NUMBER OF COMMIIq'EE MEMBERS ELIGIBLE TO VOTE: 24

681

N F P A 5 4 - - A 9 9 R O P


(Log #A100) 54/Z225.1- 1~,8 - (8.1.2 Exception No. 2 (New)): Accept in Principle SUBMITTER: Robert S. Biackwell, Independent Gas Company RECOMMENDATION: Add exception .for derating at high altitude as follows:

Exception No. 2: AnDliances tested in accordance with snecial listin~ provisions fo r operation above 2000 ft (600 hi). shall be derated, if reuuired, in accordance with their resnective installation instructions. SUBSTANTIATION: 1. Testimonial. As a propane marketer servicing appliances at high altitude, I find that many appliances are installed at 8000 ft with sea level hardware with no observed problems, although there may be some degradation in safety margins and efficiencies. The local county mechanical inspector does not inspect for derating. Many installers do nothing. Sooting problems can generally be corrected by a combination of improved venting and derating. We rarely know exactly wheat helped how much. A large part of our service efforts, regarding high altitude, deal with adjusting high efficiency appliances so that the safety controls will allow them to operate.

2. lnstructiofls, A cursory survey of installation instructions and owners' manuals shows that there is a mix of methods varying from a) now instructions to b) reducing the gas pressure to c) reducing the orifice size.

3. UMC. This change would bring Pamphlet 54 more in line with the Uniform Mechanical Code, which many authorities use as a primary reference. The 1994 edition says in paragraph 304.1 to "...the installation...shall conform to the condition of the listing."

4. Actual practice. This change would bring Pamphlet 54 more in line with actual practice in the industry e.g., the recommendation by some manufacturers to reduce gas pressure.

5. Later annllance desiens with oxygen depletion sensors, condeusing-lleat excha/agers, combustion air blowers, draft blowers, flow sensors and /o r pressure sensors do not necessarily fit the engineering models that led to the present wording in paragraph 8.1.2.

6. Rationale for 8.1.2. There are some in the industry who view the natural derafing from the increase in altitude as being adequate. Others believe that the derating should be the same as the percentage loss of air density. For example, at 8000 ft above sea level, air has lost 24 percent of its density while the 4 percent per 1000 ft rule would require a 32 percent derating. Previous testing by the AGA and GRI indicates that the 4 percent per 1000 above seal level is a fair estimate for a broad range of appliances but does not precisely apply to all appliances. Topical Report number GRI 95/0014 explains some history of this issue, an overview of current problems and can be obtained from GRI without charge.

7. Emissions. efficiency, safety. It would be appropriate to test appliances at high altitude to ensure that emissions standards, rated fuel efficiencies and safety standards (including safety margins) are met;

8. Tamperip~ would be reduced. The uneducated and uninstructed adjustment of and deforming of appliance components would be reduced by providing specific recommendations from the manufacturers as to the proper way to derate for high altitude.

9. Compliance. This change would cover manufacturers who recommend derating by reducing the gas pressure at the orifice. Currently the installer has no way to know that reducing the pressure accomplisbes the intent of paragraph 8.1.2.

10. Cost-benefit. In the opinion of the originator, this proposal will have a beneficial cost-benefit ratio. The cost and benefit issues relevant to this proposal are:

COST INCREASES More manufacturers may choose to add decating instructions to

their publications. More manufacturers may choose to test their applianc~/s at high

altitude. COST DECREASES Reduce call back for replacing or adjusting flow sensors. Reduce fuel expenses for more effÉciently adjusted appliances. Reduce capital expenses for more appliances designed for use at

high altitudes. This change may reduce accidents at high altitude and their

associated costs.

Reduce litigation expenses. This change should help reduce the introduction of frivolous evidence in fire, monoxide and explosion litigation at high altitudes.

BENEFITS Reduce confusion over proper derating methods. Reduce the production of air pollution.

CO MITI'EE ACTION: Accept in Principle. COMMITTEE STATEMENT: See Committee Action and Statement on Proposal 54/Z223.1-139 (Log #N23). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITI'EE ACTION:


(Log #N2$) 54/Z223.1- 139- (8.1.2, Exception No. 2 (New)): Accept SUBMITrER: Robert S. Blackweil, Independent Propane Co.

! RECOMMENDATION: Add Exception for derating at high altitude as follows:

Exception No. 2: Listed appliances shall be permitted to be deratecl in accordance with the terms of the listing.

v

SUBSTANTIATION: 1. Testimonial. As a propane marketer servicing appliances at high altitude, I find that many appliances are installed at 8000 feet with sea level hardware with no observed problems, although there may be some degradation in safety margins and efficiencies. The local county mechanical inspector does not inspect for decating. Many installers do nothing. Sooting problems can generally be corrected by a combination of improved venting and derating. We rarely know exactly what helped how much. A large part of our service efforts, regarding high altitude, deal with adjusting high efficiency appliances so that the safety controls will allow them to operate.

2. Instructions. A cursory survey of installation instructions and owners' manuals shows that there is a mix of methods varying from a) no instructions, to b) reducing the gas pressure, to c) reducing the orifice size.

3. UMC. This change would bring Pamphlet 54 more in line with the Uniform Mechanical Code, which many authorities use as a primary reference. The 1994 edition says in paragraph 304.1 "...the installation...shall conform to the condition of the listing."

4. Actual practice. This change would bring Pamphlet 54 more in line with actual practice in the industry, e.g., the recommendation by some manufacturers to reduce gas pressure.

5. Later apnliance designs with oxygen depletion sensors, condensing heat exchangers, combustion air blowers, draft blowers, flow sensors, and /o r pressure sensors do not necessarily fit the engineering models that led to the present wording in paragraph 8.1.2.

6. Rationale for 8.1.2. There are some in the industry who view the natural derating from the increase in altitude as being adequate. Others believe that the derating should be the same as the percentage loss of air density. For example, at 8000 feet above sea level, air has lost 24% of its density while the 4% per 1000 foot rule would require a 32% derating. Previous testing by the AGA and GRI indicates that the 4% per 1000 ft above sea level is a fair estimate for a broad range of appliances but does not precisely apply to all appliances. Topical Report number GRI 95/0014 explains some history of this issue, an overview of current problems, and can be obtained from GRI without charge.

7. Emissions. efficiency, safety. It would be appropriate to test appliances at high altitude to ensure that emissions standards, rated fuel efficiencies, and safety standards (including safety margins) are met. 8. Tampering would be reduced. The uneducated and

uninstructed afdjustment of and deforming of appliance components would be reduced by providing specific recommendations from the manufacturers as to the proper way to derate for high altitude.

9. ComDliance. This change would cover manufacturers who recommend deratlng by reducing the gas pressure at the orifice. Currently the installer has no way to know that reducing the pressure accomplishes the intent of paragrapb 8.1.2.

10. Cost-benefit. In the opinion of the originator, this proposal will have a beneficial cost-benefit ratio. The cost and benefit issues relevant to this proposal are:

COST INCREASES: More manufacturers may choose to add derating instructions to

their publications. More manufacturers may choose to test their appliances at high

altitude. COST DECREASES: Reduce call backs for replacing or adjusting flow sensors.

682

N F P A 5 4 - - A 9 9 R O P

Reduce fuel expenses for more efficiently adjus ted appliances, Reduce capital expenses for m o r e appl iances des igned for use at

h igh altitudes. This change may reduce accidents at h igh alt i tude and their

associated costs. Reduce litigation expenses . This change shou ld he lp reduce the

in t roduct ion o f frivolous evidence in fire, monox i de a n d explosion litigation at h igh altitudes.

BENEFITS: Reduce confus ion over p rope r derating" methods . Reduce the p roduc t ion of air pollution.

COMMITTEE ACTION: Accept. COMMITTEE STATEMENT: T he extensive substant ia t ion provided by the submi t te r is mostly irrelevant. T he proposal is accepted to pe rmi t listed appl iances to be dera ted in accordance with the terms of their listing. NUMBER OF C O M M I T T E E MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITT E E ACTION:


(Log #CP16) 54/Z223.1- 140 - (Chapter 9): Accept SUBMITTER: National Fuel Gas Code Commi t t ee

] RECOMMENDATION: Delete Chapter 9. S U B S T A N T I A T I O N : T he subject has been covered in the appl inace s tandards and is no longer needed in the National Fuel Gas Code. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A152) 54/Z223.1- 141 - (Tables 10-15 and 10-16): Accept S U B M I T T E ~ James A. Ranfone , Amer ican Gas Associat ion RECOMMENDATION: Revise head ings for Tables 10-15 and 10- 16 as follows:

Table 10-15 M a x i m u m Capacity of P ~ c S e m i - R i o t Tub in~ in Cubic Feet of Gas per H o u r for Gas Pressures o f 0.5 psi or Less and a pressure Drop of 1.0 Inch Water Co lumn (Based on a 0.6 Soeciflc Gravity Gas) \

Table 10-16 e : ~ : ~ w~t.~ ~^. ,~ ~.: D . . . . . . . . -~ .a . : - - M a x i m u m . . . . . . . . . . . . . . . . . . . . . . o n . . . . . . . . .

Cavacitv of Semi-Rigid T ub i n~ ~.f D:.ffczcm: D:^_.~ctcm -._n~ Lc:=~#.~ in Cubic Feet he r Hour (CFFI) for a Gas Pressure o f 2 nsi or less

D . . . . . . . . r ~ . . . . . . 4 and Pressure 1)ton of ~ 17 Inch Water Co lumn . . . . . . . . . . . . . . a C^~ ~.f (Based on a 0.6 Snecif ic Gravitv Gas) ff~.m P~.'m~ .~f

SUBSTANTIATION: To make the dries consis tent with the fo rmat used the od le r semi rigid tub ing tables. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #A18) 54/Z223.1- 142 - (Tables 10-19,10-20,10-21,10-22,10-23,10-29,10-30 and 10-31): Accept SUBMITTER: Rober t Torb in , Foster-Miller, Inc. RECOMMENDATION: Revise as follows:

1. All "EHD 14" changed to "EHD 15" 2. Note to users of elevated pressure tables corrected to reflect

c o r r e c t p r e s s u r e drop requi rements . a. In Table 10-22, revise note to read: "Table does no t include

effect of pressure d r o p across line regulator. If regulator loss exceeds A :.a. 3 / 4 psi DO N O T USE THIS TABLE. Consul t with regulator manu fac tu r e r for pressure drops and capacity factors. Pressure drop across regulator may vary with the flow rate."

b. In Table 10-23, revise note to read: "Table does no t include effect of pressure drop across line regulator. If regula tor loss

A exceeds . .:~. 1 usi DO NOT USE THIS TABLE. Consul t with regulator m a n u f a c t u r e r for pressure drops and capacity factors. Pressure drop across regulator may vary with the flow rate."

c. in Table 10-31, revise note to read: "Table does no t inc lude effect of pressure drop across line regulator. If regulator loss exceeds A "a. 1 tysi water co lumn, DO N O T USE THIS TABLE. Consul t with regula tor manu fac t u r e r for pressure drops and capacity factors. Pressure drop across regulator may wary with the flow rate.

SUBSTANTIATION: N u m e r o u s typographical errors have been no ted in the C.SST sizing tables inc lud ing errors which could have ser ious safety implications.

Purpose: Revise bo th mino r and major errors in cu r r en t C2.%ST sizing tables.

Reason: C.SST sizing tables have been deve loped by Foster-Miller for use by CSST manufac ture rs , gas utilities, gas p ip ing installers a n d p l u m b i n g inspectors. The tables were developed based on extensive laboratory test ing and eng inee r ing analyses. Tables r ep roduced in cu r r en t code shou ld reflect the latest version of the Foster-Miller research.

Cost Impact: Proposed change is expected to have no cost impact on code users and installers.

Substantiat ion: w i t h o u t changes , installers could improper ly sized ~KST systems resul t ing in an unders ized piping. This could lead to i m p r o p e i appl iance opera t ion a n d thus pu t the h o m e owner at risk. COMMITTEE ACTION: Accept . NUMBER OF COMMITrEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigeiow, Rhead, Whi te

(Log #A132/N24) 54/Z223.1- 145- (11.2.1): Accept SUBMITTER: Allen L. Ru tz / imr ry Brand, Bat te l le /GRI RECOMMENDATION: Revise text as follows:

11.2.1 These vent ing tables shall no t be used where obstructions, as descr ibed in the except ions to Section 7.15, are installed in the vent ing system. The installation o f vents serving listed appl iances with vent d a m p e r s shall be in accordance with the appl iance manufac tu re r ' s instruct ions, or in accordance with the following:

(a) T h e m a x i m u m canacitv of the ven t system shall be d e t e r m i n e d us in~ the ';NAT- Max" co lumn.

(b) The m i n i m u m caoacitv shall be d e t e r m i n e d as if the aool iance were a fan-assisted anol iance, us in~ the "FAN Min" co lumn to de t e rmine the m i n i m u m canacitv of the vent system. Where the cor resnond in~ "Fan Min" is-"NR;' the vent coi~'muration shall be no t nerrnit ted an-d an alternative vent in~ confimura~ion shall be utilized. - - SUBSTANTIATION: Part 11 current ly canno t be used to size vent systems for draft h o o d equ ipped appl iances tha t also inc lude a vent damper . This proposal provides a m e a n s o f us ing the informat ion in Part 11 to size vent systems for such appliances. This proposal is an alternative to manu fac tu r e r ' s installation instruct ions. Became of manufac tu re r s ' specialized knowledge of the opera t ing characterist ics of their appliances, manufac tu re r ' s installation ins t ruct ions shou ld be r e tmned as a m e t h o d of sizing such appliances. If manufac tu re r ' s installation ins t ruct ions allow a vent ing configurat ion that would no t be permi t ted us ing this proposal, the vent ing conf igurat ion shou ld be permi t ted to be in accordance with the m a n u f a c t u r e r ' s r e commenda t ions . COMMITTEE ACTION: Accept . Accept and subst i tute "NA" for "NR". COMMITrEE STATEMENT: Accepted with a change for constancy with o ther actions. NUMBER OF COMMITI'EE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A133/N58) 54/Z223.1- 144- (11.2.4): Reject SUBMITFF.R: Glen Edgar, Selkirk Metalbestos RECOMMENDATION: Revise as follows:

11.2.4 Zero (0) lateral (L) shall apply only to a s t raight vertical vent a t tached to a top outlet draft h o o d or f lue collar. Char t canacitv for laterals exceedin~ 33 ne rcen t o f he igh t are aovlicable only when lateral is located wi th in-bot tom 33 ve r cen t of vent height. E n ~ n e e r e d m e t h o d s are reoui red for de t e rmin in~ sizine for Ion~ offsets near ven t system outlet. S U B S T A N T I A T I O N : Long offsets in attics have been shown to be associated with the occur rence of nu isance condensa t ion an d improper venting. With such large offset h igh in the system, the internal pressure becomes positive due to the relatively large fl0w resistance nea r the te rmina t ion . This causes an outward leakage of mois t flue gases at jo in t s which results in nu i sance c o n d e n s a t i o n / c o r r o s i o n when the flue gas contacts cool surfaces. The Vent 2 s imula t ion p rog ram very clearly d e m o n s t r a t e s / c o n f i r m s this p h e n o m e n o n . With proper (and in mos t cases significant) capacity reduct ions , long laterals may be viable in some instances. However, unti l s ome type of rules can be

6 8 3

N F P A 5 4 ~ A 9 9 R O P

developed which address the necessary reduct ion in capacity to be allotted in such situations, these systems should be sized only via eng inee red me thods such as Vent 2. T h e p roposed 'new s t a t emen t is i n t ended to address this si tuation in the interim. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commi t t ee is conce rned with a possible conflict with o n g o i n g research. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #CP7) 54/Z223.1- 145- (11.2.4, 11.3.24 (New)): AcCept SUBMITrER: National Fuel Gas Code Commi t t ee RECOMMENDATION: Add new 11.2.14 and 11.3.24 to read:

"For vent he ights lower t han 6 ft and h igher t hen shown in the tables, eng inee r ing m e t h o d s shall he used to calculate vent capacities." S U B S T A N T I A T I O N : To provide guidance on vent he ights lower than and h ighe r than shown in the tables. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:

AFFIRMATIVE: 20 ABSTENTION: 1 NOT RETURNED: 3 Bigelow, Rhead , White

EXPLANATION O F ABSTENTION: BUCHAL: Reference to eng inee r ing m e t h o d s for calculation of

vent capacities wi thout specific re ferences or gu idance seems inappropr ia te .

(Log #A128/N63) 54 /Z223 .1 -146- (11 .2 .8 ) : Reject SUBMITTER: Allen L. Ru tz /Lar ry Brand, Ba t te l l e /GRl RECOMMENDATION: Revise text as follows:

11.2.8 f f t h e vertical ven t has a larger d iameter t h a n the vent connector , the vertical vent d iameter shall be used to de te rmine the m i n i m u m vent capacity, and the connec to r d iamete r shall be used to de t e rmine t he m a x i m u m vent capacity. The flow area of the vertical vent shall no t exceed seven t imes the flow area of the listed appl iance categorized vent area, flue collar area, or draft hood outlet a rea unless ~cz!g=z.tc~ des igned in accordance with approved eng inee r ing methods . For vents serving a single draft hood-co.uipped appl iance, a m i n i m u m of one foot of vent C0Ntq¢ctor rise shall be orovided directly above the draft h o o d outlet. S U B S T A N T I A T I O N : Recent GR1 research on the Seven-Times Rule was conduc t ed us ing mode l i ng and exper imenta l analysis. The results, to be d o c u m e n t e d in a GRI Topical Report , reveal the impor tance of vent connec to r rise for the vent to properly pr ime when the vertical vent is of a larger flow area than the vent connector . Wi thout adequate rise direcdy above the draft hood oude t , the vent may have difficulty establ ishing adequate draft. This si tuation is especially critical when the vertical vent flow area is m u c h larger than tha t of the vent connector . Ensur ing adequa te

• rise directly above the draft h o o d out le t reduces p r iming t ime a n d ,associated spillage of combus t ion products . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: As the research is no t complete , the proposal is p remature . T he proposal would establish a m i n i m u m of l ift of rise for all iustallation, which can be an unnecessary hardship . NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON C O M M I T T E E ACTION:


(Log #A129/N64) 54/Z223.1- 147- (11.2.9(e) (New)): Accept SUBMITTER: Allen L. R u m / L a r r y Brand, Ba t te l l e /GRl

I RECOMMENDATION: Add new text as follows: "(d) The inpu t rat ing is less than the m a x i m u m capacity given in

Table 11-3, and (e) For a water heater , the ou tdoor design t empera tu re shall no t

be less t han 5 F. and (f) For a space-heat ing appliance. . ."

SUBSTANTIATION: Recent GRI research on the Seven-Times Rule was conduc ted us ing mode l ing a n d exper imenta l analysis. The results, to be d o c u m e n t e d in a GRI Topical Report , reveal the potential for excessive condensa t ion in exterior chimneys when used to vent a single draft hood-equ ipped gas water heater in cold climates. Previous GRI research has shown tha t excessive condensa t ion in masonry ch imneys may result in water damage to the s t ructure adjacent to the ch imney or excess water at the base of the chimney. As with space hea t ing appliances, warmer climates result in less condensa t ion t han colder climates. Unlike space hea t ing appliances, however, water hea te r loads do no t vary significantly with ou tdoor t empera tu re variations. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A130) 54/Z223.1- 148 - (11.3.1 ): Accept SUBMITTER: Allen L. Rutz, Battelle RECOMMENDATION: Revise text as follows:

11.3.1 These vent ing tables shall no t be used where obstructions, as descr ibed in the except ions to Section 7.15, are installed in the vent ing system. The installation of vents serving listed appl iances with vent d a m p e r s shall be in accordance with the appl iance manufac tu re r ' s instructions, or in ~ c o r d a n c e with the following:

(a) The m a x i m u m caoacitv of the vent connec to r shall be de t e rmin¢~ us ing the "-NAT Max" co lumn.

(b) The m a x i m u m canacitv o f the vertical vent or ch imney shall be de t e rmined us ing the "FAN+NAT" co lumn when the second ~ppliance is a fan-asSisted annliance._ or the "NAT+NAT" co lu m n when th¢ $¢¢ond annl iance is e a u i n n e d with a draf t hood.

Ic'~ T h e m i n i m u m capacity shall be d e t e r m i n e d as if t he ~pplian¢¢ were a fan-assisted appliance.

(1) T h e m i n i m u m c#nacity of the vent connec to r shall be d e t e r m i n e d us inv the "FAN Min" co lumn.

(2) T h e "FAIQ+FAN" co lumn shall be used when the second appl iance is a fan-assisted appl iance, a n d the "FAN+NAT" co lumn shall be ~sg~l when the second annl iance is eou ioned with a draft hood. to de t e rmine whe the r the vertical vent or ch imney ¢0nfigurafioo is no t permi / ted t"NI~"). Where the ven t conf igura t ion is 'qqR" the vent conf igura t ion shall n o t he nermi t ted and an alternative venfin~ conf igurat ion shall be utilized. SUBSTANTIATION: Part 11 current ly canno t be used to size vent systems for draft h o o d equ ipped appl iances tha t also inc lude a vent damper . This proposal provides a m e a n s of us ing the informat ion in Part 11 to size vent systems for such appliances. This proposal is an alternative to manu fac tu r e r ' s installation instructions. Because of manufac tu re r s ' specialized knowledge of the opera t ing characteristics of their appliances, manufac tu re r ' s installation ins t ruct ions shou ld be re ta ined as a m e t h o d of sizing such appliances. If m a n u f a c t u r e r ' s installation ins t ruct ions allow a vent ing configurat ion that would no t be permi t ted us ing this proposal, the vent ing conf igurat ion shou ld be permi t ted to be in accordance with the m a n u f a c t u r e r ' s r e commenda t ions . COMMITTEE ACTION: Accept .

[ Accept and change "NR" to "NA". COMMITrEE STATEMENT: Accepted with a change for consis tency with o ther actions. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A134/N59) 54/Z223.1- 149- (11.3.5): Reject SUBMITrER: Glen Edgar, Sell,irk Metalbestos RECOMMENDATION: Revise as follows:

11.3.5 If the c o m m o n vertical vent is offset as shown in Figure G- 12, the m a x i m u m c o m m o n vent capacity listed in the c o m m o n vent ing tables shall be reduced by 20 pe rcen t (0.80 X m a x i m u m c o m m o n vent capacity), the equivalent of two 90-degree turns. The horizontal length of the c o m m o n vent offset (LM) shall no t exceed 1 1 /2 ft for .each inch (18 cm per cm) of c o m m o n vent d i amete r (D) and the offset shall no t be si tuated within the top 50 nercen t of the vent system. Svstems incoroora t ing longer offsets and / or offsets in the ton 50 pe rcen t of the vent-system shall be sized only via annroved F~ngineered sizing methods .

684

N F P A 5 4 - - A 9 9 R O P

S U B S T A N T I A T I O N : Long offsets in attics have been shown to be ,associated with the occur rence of nu isance condensa t ion and imprope r vent ing in n u m e r o u s instances. With a large offset h igh in the system, the internal pressure becomes positive due to the relatively large flow resistance nea r the te rmina t ion . This causes an outward leakage of mois t flue gases at joints , too of ten resul t ing in nuisance c o n d e n s a t i o n / c o r r o s i o n when the f lue gas contacts cool surfaces. The Vent 2 s imula t ion p rog ram very clearly d e m o n s t r a t e s / c o n f i r m s this positive pressure p h e n o m e n o n when elbows are used near the te rminat ion . With proper (and in mos t cases significant) capacity reduct ions , long laterals may be viable in some instances. However, unti l s ome type of rules can be developed for the sizing tables which address the necessary reduc t ion in capacity to be allotted in such situations, these systems shou ld be sized only via eng inee red m e t h o d s such as Vent 2. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commi t tee is conce rned with a

ssible conflict with ongo i ng research. MBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24

VOTE ON C O M M I T T E E ACTION: AFFIRMATIVE: 21 N O T RETURNED: .'4 Bige low/Rhead , White

(Log #A131/N65) 54/Z223.1- 150- (11.3.15): Reject SUBMITTER: Allen L. Rutz /Lar ry Brand, Ba t te l l e /GRl RECOMMENDATION: Revise text as follows:

11.3.1.5 Where two or m o r e appl iances are connec ted to a vertical vent or chimney, the flow area of the largest section of vertical vent or ch imney sball no t exceed the foilowin~ zc;'e~ ~mc~

~r 2rz.ct !:c.c.~ cut le t area unless des igned in accordance with approved eng inee r ing methods .

(a) For vertical vents. 15-times the flow area of the smallest listed annl iance cate~orlzed vent area. f lue collar area. or draft h o o d outlet area. and

(b) For masonry chimneys, seven t imes the flow area of the smallest listed anol iance categorized ven t area. flue collar area. or draft h o o d outlet area. and

(c) A m i n i m u m of one foot of vent connec tor rise shall be nrovided directly above the draft hood out le t o f annl iances equ ipped with draft hoods. - - S U B S T A N T I A T I O N : Recent GRI research on the Seven-Times Rule was conduc ted us ing mode l i ng a n d exper imenta l analysis. T h e results, to be d o c u m e n t e d in a GRI Topical Report , reveal the impor tance of vent connec to r rise for the vent to properly pr ime when the vertical vent is of a larger flow area than the vent connector . Wi thout adequate rise directly above the draft hood outlet, the vent may have difficulty establ ishing adequate draft. This s i tuat ion is especially critical when the vertical vent flow area is m u c h larger t han tha t of the vent connector . Ensur ing adequate rise directly above the draft h o o d o u t l e t r e d u c e s print ing t ime a n d associated spillage of combus t ion products .

For Type B vents, if a m i n i m u m of one foot of rise is provided above the draft hood, the area ratio limit may be ex t ended to "15 t imes" without causing excessive spillage or condensa t ion . For masonry chimneys, excessive condensa t ion may result if t he area ratio exceeds "seven times," so the cur ren t a rea ratio limit is main ta ined . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: As the research is no t complete , the proposal is p remature . T he proposal would establish a m i n i m u m of l-ft of rise for all irrstallation, which can be an unnecessary hardship . NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMIT T E E ACTION:


(Log #A98) 54/Z223.1- 151 - (11.3.17): Accept SUBMITTER: Dave Fetters, Hart & Cooley, Inc. RECOMMENDATION: Revise as follows:

11.$.17 Listed, corrugated metallic ch imney liner systems in masonry ch imney shall be sized by us ing Table 11-6 or 11-7 for Type B vents, with the m a x i m u m capacity reduced by 20 percent

(0.80 X m a x i m u m capacity) a n d the m i n i m u m capacity as shown in Table 11-6 or 11-7.' Cor ruga ted metall ic l iner systems installed with bends or offsets shall have thei r m a x i m u m capacity fu r ther r educed by 10 ne rcen t for each 90 ° tu rn (two 45 ° elbow are eouivalent to one 90 ° elbow~ :~ ~-ec~ra.~c.~xce :;~.Lh 11.~.~. SOBSTANTIATION: Many cor ruga ted chimney- l in ing systems on the marke t today do state or show a 20 pe rcen t capacity reduct ion. However, they also go on to state tha t this 20 pe rcen t reduct ion in capacity includes two 90 ° elbow, which is no t the original intent . It is confus ing when the cu r ren t wording o f 11.$.17 refers the reader back to 11.$.6, which in tu rn refers to 11.3.5. COMMITTEE ACTION: Accept . Revise as follows:

11.$.17 Listed, cor rugated metallic ch imney liner systems in masonry ch imney shall be sized by us ing Table 11-6 or 11-7 for Type B vents, with the m a x i m u m capacity r educed by 20 percen t (0.80 X m a x i m u m t~a ' and the m i n i m u m capacity as shown in Table 11-6 or 11-7. pa ° ty ) Cor ruga ted metall ic l iner systems installed with bends or offsets shall have thei r m a x i m u m capacity fu r ther reduced bv 10 nercen t for each 90 ° turn. Two 45 ° elbows shall be eouivalent to one 90 ° elbow "a =zcc.r~m;cc v'=.h !!.~.fi. C~)MMITTEE STATEMENT: Accepted with an editorial revision NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A91/N20) 54/Z223.1- 152- (11.3.18(e) (New)): Accept S U B M I T r E R : James P. Brewer, National Ch imney Sweep Guild RECOMMENDATION: Add the following text to read as follows:

(el T h e vent connec to r sizing is in accordance with Table 11-8. SUBSTANTIATION: Section 11.3.18 does no t provide guidance for sizing of connec tors when us ing Tables 11-12 or 11-13. When the exterior masonry tables were expla ined to ' the commit tee du r ing the 1996 revision cycle it was clear that the in tent was to size connectors in accordance with Table 11-8. This p roposed revision simply provides the necessary gu idance to properly size the connectors when us ing the exterior mason ry ch imney tables. C O M M I T r E E ACTION: Accept . NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead , White

(Log #AS) 54/Z223.1- 153 - (Table 11.11 ): Reject SUBMITTER: Ross IC Burnside, Carrier Corpora t ion RECOMMENDATION: Move Table 11-11 to follow 11-5 an d r e n u m b e r as 11-6. R e n u m b e r Tables 11-6 t h r o u g h l l - l $ ( b ) . S U B S T A N T I A T I O N : Table belongs with single appl iance installations. COMMITTEE ACTION: Reject. COMMrVFEE STATEMENT: The commi t tee believes that the 2 tables covering exterior masonry ch imney tables shou ld be kept together. NUMBER OF COMMITTEE MEMBERS ELIGIBLE T O VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #N70) 54/Z223.1- 154- (12.1.3): Reject SUBMITTER: Dale L. Powell, Copper Deve lopmen t Assn. RECOMMENDATION: Add the following to Section 12.1.3, ASTM Publications. Amer ican Society for Tes t ing and Materials, 1910 Race Street, Philadelphia, PA 19103.

ASTM B 819-95. S tandard Snecification for Seamless Conne r Tube for Medical Gas Systems.

ASTM B 857-96. S tandard Snecification for Seamless Co n n e r Tube for Natural Gas and Liouefied Pe t ro leum (LP) Gas- Fuel Distr ibution Systems.

6 8 5

N F P A 5 4 - - A 9 9 R O P

SUBSTANTIATION: If the changes to Section 2.6.3(b) - Metallic Tubing, are accepted with respect ~;o the two new copper tube standards, the addition of these two new standards must be included in Section 12.1.3, ASTM Publications. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Part 12 is not changed by proposals, it is a list of all standards referenced in the Code. This will be taken care of by staff. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE 'ACTION:


(Log #A14/N36) 54/Z223.1- 155- (A.6.3.5): Accept SUBMITTER: Wilbur L. Hang, Jr:, A.O. Smith Water Products C o .

I RECOMMENDATION: Correct the title of Section IV to: "Rules for Construction of Heating Boilers."

SUBSTANTIATION: Low Pressure Heating Boilers is not the title. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #A1 ) 54/Z223.1- 156 - (Figure A.7.8): Accept SUBMITTER= Eric Hawkinson, Heatilator

I nRn~.DCOMMENDATION: Revise text as follows: irect Vent Terminal 10,000 Btu/hr or less a t6 in. instead of 9

i [)irect Vent Terminal 10,000-50,000 Btu/hr at 9 in. instead of 6 I n . SUBSTANTIATION: Editorial. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigelow,-Rhead, White

(Log #A13/N37) 54/Z223.1- 157 - (Figure A.7.8): Accept SUBMITTER: Wilbur L. Hang Jr., A. O. Smith Water Products Company RECOMMENDATION: Revise c~Lptions similar to the example following:

Mechanical

)

Di,o=v~to~Jdoara~o " ~ e , ~ l ."ql I>YI I /

Clearance On.) ' A I i,." Ir~,~<. Inp~ {Btu~ 0 6 ~ ~ / ~ Forced air 10,000 or less

10,001 to 50.000 Over 50,000 12 ~ ~ ' ~ (son 7.8-c)

For SI units: 1 ft = 0.305 m; 1 in. = 2.54 cm; 1 Btu/hr. 0.293 watts

Figure A.7.8

SUBSTANTIATION: The present figure is too busy. The proposed revisions make it much easier to read. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 NOT RETURNED: 3 Bigeiow, Rhead, White

24

(Log #N15) 54/Z223.1- 158 - (Figure A-7-8): Reject SUBMITTER: John P. Certuse, Attleboro Falls, MA RECOMMENDATION: Add text as follows:

"Mechanical draft and direct venting systems shall discharge to the non prevailing weather side of the home." SUBSTANTIATION: Being involved in investigations of soot accumulation in homes, many occurrences are found that direct venting systems are installed "up wind" on the weather side of the house. This causes the discharge to be blown back against the house and into the house through the ridge, gable vents etc. All manufacturers of these equipment direct that the installation be downwind. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The appliances are wind tested under ANSI Z-21 series standards and UL standards. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log #N6) 54/Z223.1- 159 - (Table F-1 (New)): Reject Note: This Proposal appeared as 54-88 which was held from the

Annual 96 ROC on Proposal N/A. SUBMITTER: Dick Hanna, Bard Manufacturing Co. RECOMMENDATION: See new Table F-I (on following pages) that includes both metric and fractional drill sizes in addition to number drills. Also included is decimal equivalent in inches for each drill size for ready cross-reference and verification purposes. SUBSTANTIATION: Many appliances are now designed using orifice sizes other than drill number reference in order to closer match rated input of the appliances. In many cases the increments between number drill sizes are too long and addition of the metric and fractional sizes narrow the increments.

Also, there are some errors in the existing Table F-l, and these have been corrected in the attached proposed Table F-1. COMMITTEE ACTION: Reject. COMMITI'EE STATEMENT: A spot check of the proposed table entries was found to be inconsistent with data available at International Approval Services. The committee would consider reversing its acnon if the basis of the calculations are provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


686

NFPA 54 - - A99 ROP

APPENDIX F FLOW OF ~ THROUGH FIXED ORIFIGE.~ TABLE F=I UTILITy GA,SES

i t ' I" T i • t I l " : ~-r~; plJll l Orifice D~I. ; ' " P r l l lU lC I~ Orlfml - ~ Wtt~l" ~ m l n I I : Size NO. MM I in In¢1",1¢ ; 3 i 3 5 ; 4 ' 5 6 l 7 '~ 8 9 - - " T 10 --

. ' ' • - - ~ i ; . • : I _.. I I 80 I 0.013~0 ', 0.48 , 052 0=,5 • 0.6"2 ! O.b'7 i - 0:73 ! 0.7~ i 0".8"3 -:=-"~0."-~7~

o . 3 s l O.Ol 370- ~' - -0 :49 { 0 .53 =' 0 '~7 ' 0.6"3 : 0 .09 J 0 .~$ ' 0 . ~ 0 .8~ ~ 0"89 , - , [ . ?9 ! 0 0 1 4 ~ : O.GS I o . ~ o~;4 o.71 i 0 7 8 j 0.84 0.90 0.9".:, "01

r ~ , i o . o , . ~ i ~s~ , o . . . : o 7 , " o ~ r o ~ I o ~ , o 5 j , , 1 : - , , - - t - - - o.40i'o.ois74 , oGs i 0.70 ' b7~ 0.84 0.92 ] 0.gg I.o6 ~ 1_13 - 1.1g

78 0T1~1600 [ 0 6 7 , 0_72 i 077 '. 0.87 I 0.~"3 ] 1.02 "" 1.10 - ~ ~ ~0- " ":22 - 0.45 O.0iT'tb" ":' b. '~" 1 ~ 0 - -~ " 106 1 1 . 1 l . 1 , ~ 4~ , ~ -

7 6 O.OZ~000 ; 1 I ~ i 1 .13 , 1 . 2 1 t .35 i ( ' 4 8 j 1 .60 1.71 i '1.02 ; ~ .91 '75 ~ a ~ m m r 0.012100 ; ' 1 .15 ~ 1.25 ",1 1.33 [ ' 1 . 4 9 ~ 1.63 i . 7 6 ~ . ' I ~ i ~~--:--2.11

0.55 0.021~o , 1:22 1 32 ~ 4'~ 1.57 l 1 . 72 1 t . ~ 74 '" - " i 2 0 3

7:]

O.@z~O ;,,L__ 5.32 ; !.43 : '1 . .~ 0.60 0 . ~ i 141; i 1.58 l~=g

' 1 51 I 1.E3 1 74 0.02400 : O.u~JuU ! 1 ~ , 1.77 i 109

0 , ~ I 0,0~'~,0 ' ,~.70 ~ 1.04 ; .i ~7 71

O.U.a~IU I~7"7 i I g I , i. i 0.70, - - - L . . . . r O.U~I"J~ ' 1 .~4J~ : 2 .15 2 30 2 5 7 Z~:~l " | 3.041

7 0 0 . ~ ~ .06 ; 2 .22 - - 2 .37 2 .65 2.91 3 14 ~:~ 0.02~2G i ~.24 I 242 ZSO - -~00 3.17 3.43

0.7~ 0.O'J0r~ L 9 - ~ ! 2.4~ _ . Zb'~ " ; ~-.G4 3'30 3.48 r~ 0 .03100 , .~5":2 t 27:2 1 2.91 , 3.25 3.56 I 3.05

;F~ O.OOT~ , £S0 ~t i , z - ~ 3.3o I 3.02 l a,~l 0.00 0.0314~ ' 2.60 I' 2.01 a.a6 i 3.60 J 3.97

67 ' 0"~1~1~;10 " ~ - ~ i ~ . ~ 3.4~ 3 .~0 . ' 4 .10

o.o33c0 i zes I ]~B 0 .05 O . I X ~ 4 0 j 2.91 I 3 14

6s o . ~ 3::z~ " i 3.~7--- o . ~ o . o ~ 3 - - ~ % - - - ] ",ss

64 0 . 0 3 ~ 0 3.40 I 3 . ~ 0.03700 I 3.S0 i 3.~8

83 0.95 0 .03740 3.64 : 3.93 02 0 . ~ I 3.78 i 4.08 51 0 . ~ " 3 .E~'9 ! 4.31

6O

t.9g ; 2 : ~ - - ~ 2-22

1.9'5 2.13 j Z.30 Z.4~ i 2.61 i 2 7 5 2.12 p, ,~ ~ 2.50 7..58 ~ 2.6,¢ 2.89 2.20 2.41 • 2 . 8 0 2.78 ', 2.95 3.1

2.29 2.51 , 2.71 2.8g ~ 3.07 ; 3.24

58 S7

3 .25 ; 3 4.5 3 .64 3 .36 , 3 .5~ 3 .75 3.G~ i 3.88 4.00 3.72 ] 3.g6 ~ 4.1 4.1'2 ; 4.36 4.00 4.10 ; 4.40 4.67

0 I 4.3111 ~ 4 .65 .* .QI~

3 3~ "' 3:75 ... 4.11 ! 4.44 4.?~; ! 5.04 ~ 31

'ao : 4 L ~ : 4.G5 i S.03 5.37 : S.70 i " G 0 1 3.g2 I S . lg .:~ 4~t

4.20 4.70 i 5.15 l 5.56 : 4.37 4.89 l 5.30 1 ~ .70 '

56

55

54

t116

I.o0 0 . 0 ~ ? i ~;0~ i ~ i "..~ "~-2~ ~ s.74 O,GIIXX) [ 4 ,20 ; 4 .53 : 4.6,4

'1.05 0.04130.. ~ 4.51 ~ 4 .87 " 5.~1 5 .02 I I ; .3~ o o ~ o i 46-2 I 4 ~ 5 3 4 ' i 5~7 : 0.54 0 ~ ~ 4.a5 5.23 5.6o : ~;.i~ I ~.!~5

1.10 0.~L3_30 ' 4:g2 i 5.31 ~ 5.~1 : 8 . ~ 8 . ~ t .15 0.04S20 i 5.37 : ~.80 G.20 ~ G.o~4 I 7 8 0

0.04~,~0 . 5.67 ! 6.12 I 6.54 : 7.32 8.01 0,04687 i 5.7G j 6.22 : 6 6 3 i 7.44 8.15

1.20 0.04724 i 5.05 t 6.32 j 6 7 0 ~ 7 5 6 8.Z7 1.2"30.O~S20 I 0.34 6.05 l 7-32 ~ 0,1~ 0,~ ' 1,30 0,0~110 j 6,07 7,42 7.9"3 i 8.86 8.71

0.06200 I 7.og 7.e~ 1 e.1'9 t g.15 10.03 1.3~ 0 . 0 ~ 3 1 0 7 36 7 .95 ~ e .50 ! 9.51 10.41 1-1.25

1.40 0,05~10 I 7.96 1 8.eO ~ 9.20 10.~I t t . . ~ | ~ . t 8 t .45 0.05700 ; 6,49 ! 9,17 , 9.e0 t0 .~ ; 12.0t 1 2 9 7 1..T~O O.O~gOO I 0.14 i 0.87 ' 10.~6 ; 11.10 12.93 "13.g6

11 '~]16 1'I,1§ i .oo..o.. 1 ,o,o! 1 . ~ 0 . ~ 1 ~ , ~.7~ 10.~3 , ~ 1T2"~ f ~ "1~ .~ ' ~4 .~

0,~"~-~0 i 10 .24 11,0~" ; 11.82 13.22 _ 14.4.,8 15~11 1.80 0.0K2gg ~ 10.40 i 11.23 ; 1:2.01 . 13.43 14.71 I 15.89

0 . 0 6 3 5 0 1 10.5-7 I 11'.42 ' - 12.21 ~ 13.66 14.<J~ 18 .15

-------4 i i ! . . . .

8.18 ! Q.~ i 6.9~ 6,~pl | 691 I 7~e

6.4;I 6 .85 ] 7 .27 ] 7' 6 6.73 7.19 7.63 I ST( 6.89 7 . ~ 7.6'1 i 8:!3 7.06 7.55 8.01 8.44 / - ~ 7.ot 8.30 1 8 . ~

' /%1 8.03 8.52 i 8.~8 8.21 8.78 9.31 ] 9.01 8 . ~ ...g.25 g.o2 J 10.35 0.~0 9.41 9 . ~ : 10.02 8.94 ~ . ~ 10,13 ; 10.6a

10.48 11.21 11.8e i ~Z53 10.113 ' ' " 11,541 12,28 ; 1 Z 9 4 ~

12 .02 1~.7~ I 13.44 | 'PO~ 13.74 I 14.48 t3 .00 13.7g I t4.-$4 13.87 !4.71 ~m15~. .~ . . . 1;i:~ le 8:] -~e.~- 1~,1§ l~.Oe ! 16,'95 15 .~ . '16.09 [ • 1T.80 16.72 17.74 18.70

I ' 17.28 :8.31 : 19 30 i

I i

687

NFPA 54 - - A99 ROP

A P I : ) E N L ~ I X F F L O W Of: (.i~$ THROUGI t FI~ED OatFtGE$ TP~ILE F- I UTILITY G A S E s

~ , ~ _ _ u., . . . . . ~:,r,;~ 0 ~ _ _ - - ' ~ " - 4 - - ~=~.-P,, , i , i~;~. , i o . r ~ c : : ~ i , ~ - w ; ~ J ~ , . ~ ; _-..'--~_ • I

. . . . . . . . . . . . . . . . . . . . . . . . . . . . -:- .~---___L..__~." _ _ _ _ -_' . . . . ! . . . . . "Z . . . . . . . . . . . _~_ L. . ~ ' ~ I

. . . . . . . . . . . . ; . . . . . . . . . . . . . . - ~ • , . = d . ~ L m , i ; . , , ~ l I ~ . 2 : . ) , " 7 ) ( J O 1 6 ~ : 1 8 0 2 , 1 9 1 1 , 2 0 I % I

. . . . . . . ; . . . . . . . . . . . . . . . . . . . . . . . . ,,~ , a ,~ , m o . ; . ) o i ) . , - . v , . ~ , ) . . ~ ) s J / . U J q ~ / | 4 4 •

. . . . . . . . . ~ _ . ~ _ t ?.__e~__~ . . . . , ~ o ~ - - , . - ~ ' s - ~ . ] T ~ - - ~ - 4 ~ ] ( ~ . - - ~ - - - ~ - ~ . 2 4 ! z ~ i ~ : - - - -~: .a-~ "

'./"L'-:-_T_T_F__'~_.o_~~:~-~---~-~o~ ,6~ - ~ - ~ J ] - . . . . . . ~ ' ~ . . . . ~ - n ~ - - 2 ~ . ~ '. ~-~.]~ 4o o . ~ 7 ~ : ~ " T E ' 6 " ~ - " i ~ 3 - ' "To"03 . . . . . i~>-5- . . . . . . z~. .~ ;m,.~, ; l ( .~e - - ~ ' ~

. - ~ - 3 - : i ~ b - - ~ ~04 ,~ ~ . ~ a . . . . . ~ ( . . . . . ~ :~:]d~ ~r-o.,m ~ - - ? - 48 O.~7GOO "5 14 ~6.35 17 40 '.'§-'5~ . . . . . ~ 41 ; 23.1"3 24.72 ; 2(5.22 ' ~ " -

- - ~ ' ~ ' - o 7 c r . ~ 6 - - ' :~(~ ~66K - ~ - 1 7 ~ _)%~o___.._ _~.!0o . . . . ~ . ~ z~.~r ~ ~ : 7 o z o . ) i -

. . . . . . . . Z~ O ~ ::~ )8.43 19.70 72,')] 2-<-:3 ' 20.01]'--j zr.oo 2~.55 31-i5~

.... ~ - - : ~ - ~ s ~ - ~ - ' - - ~ - 7 ~ - ...... ~ Z i ~ - - " _ i~- .~. -~ ~.~ '~ ~ : ~ - ~ - : , - ~ - o . o e ~ _ , r - ' h - ~ - - ~ . ~ ~ o . ~ - - ~ i . T . . . . ~ T ( - - 7 - - z , - ] r ~ - - ~ - - ~ - c ~ - ( ~ : - - ~ 2 " n - -

"~" o c 8 ~ " ~ 7 4 2o:,4 " 2~.e4 " ~4 ~-~- -:-..~_~ : z,~.E} i 3o.~) ~ 3-2.,~ ' ~-~

~ ,, __.~._. _ _ .... . - - _ __- ___Z_ .... Z~.6-~ I 3 .66 33.58 ~5.~0 0.06000 I '~; 20 (:]4 2"2 3B 2.5 33 "t? 4 I . . . . . . . . _ ~.20 9 e ~ e ~ ; . . ~ . , ~ - ~ . ? : - ~ s 3 ~ " ~ ? . ~ - ~ . o ~ , ~I~_~.~ i ~I~'0~I . _ ~ -

. . . . . . - ~ { ] 31C890G ---~-~ . 7 - C - - - ' - ~ i ~2 go ~Ea-f . /(J :IG " 31 .T2 33 g l I - 3S .~6 - ~- - -~-7"~1~ ~ _ ~ T - - Q ~ - ~ - - ~ - - - - ~ 2 ~ . ~ ' ~ 4 . s 2 - - T~-TS . . . . 2 i ~ , ..]2_03 .... 3~ ~o- ' 37 ~ 3 " ~ - - 3 ~ 2 4 -

. . . . . . ~ - . . . . o , c ~ : - " z . ~ - " ~ ~ m~J -~_~o . ~ . ~ ) - ~ : ~ - - - - ~ , ' - ~ - - : - - ~ - E - )"321 YEg3 ~ - - - ~ ~ ; ~ 24 ~9 ~ . ~ ,-~.74 " ~-~-~8--- T:--3&'~g 37 G2 - - 39191 I 42.3~ --

. . . . . ~: . . . . : C ~ X } ? ' - 'E 2E;CJ9 2 7 g o : I - 1 " ' - - ' } . - L " } 4 : 5 - - - - 3 6 J 0 " 3~,4~ ' i 1 . ~ 4 , 4~.,I"T':~" . . . . . . . . . 2~_4-~...9 ~ _ _ . ; ( ~ ~J ~C 2B 12 __~ 44" . . . . 34. ,1.4. 37" 2{} 3~ T7 42.18 44.4~S

, 4 / . ) o 0 I01EL: 3". : ' 2g.~7 3~ 4g "'~ 348~ 38---~g 41.25 " 44.10 I 4 6 7 7 i d~.:~C-

. . . . :~ 2.~0i o~02 , . ,~ - - -~ - -~ - - - - - -~767 31.71 ~ 3~5.4G - ~ , 3 4 41.95 ' 44 .~ 4r.§T ' ,50.15

2.70i C) lO~;n~ - - ~ % . . . . :}'ZOO ,, ,3420 .... 3 a 2 4 . . . . . . 41 ~ 4 ~ , ~ _ 4,11.37 ! , ~1,31 " ~ o~ ~ ' o ~ e ~ s o ? ; - % ~ Z ~ " ~ . ~ ~ . ~ . . . . . . ~-~.% (s.(2 ($.,~ . (~,~o s425

r~E~ a IU"~2 ~-' "~- 33 87 ; 36 2~ 40 4g ~'- 35 " ' 47.90 51 21 i 94.32 ' 57 2 ~ - -

Z.S0- 9 . i1024 ~ ' ~ : 34.41 36.78-- 41.12 " ~ " ~ ' ~ i 8 :~ 52.02 . . . . ~5:17 5 0 . 1 6 - - ___ 34 0.1110~ Y L ~ 3 4 , ~ 37' 30 - = a l T'O 45 68 49.34 52.7~ ,~ ,94 ~ . ~ 7 -

33 O.!"30: ~% " ' 36.15 , _ ~ ~ . Z l - - 4-7-~4 - - GI,1~ ~ .6k ; ~7.g6 ~ 11 . . . . . . . . . - ~ - . g i : j - - ~ 7 ~ - - ' , , ~O.~i " ] - - - - ~ - - i - ~ - - ' 4~ 33 E } - ~ 5~.gO 5g,~9 62.39 . . . . . . ~ . . . . D:1~- i -~ ~ . ~ [ C , . ~ . - - - ~a 10 I 40.7] ~ - - ~ - - i ~ - ~ - - S3.88 S?.50 GI.09 6 4 . 4 0 -

31 O ~

. o ~ ~ _ ~ ~ ; z - i ,7 .3o ! ~;z.em s7_~3 ~-a..~ i " - ' ~ - , 9 ' 7o.~4 _3.~o I o . ~ ~ . . , - - - ~ - - ~ - - ~ ;mTo~ ! -s~ :~ , . - s ' ~ -~ "~-~ ! 6 7 9 4 ~ o 7 7 S ~

. . . . .' a lz~..~ - - . ,~ ~ r ~ i - 4 9 9 8 ' ; ' 55.88 --"~i ' :7_Z ' l 6 0 ~ 7ao'a 7497 /'~JO~ -

~.4.u o.~_J.,.~ . ~ • ~073 ,~ .24 ~;864 --E~S~.3 , 71.75 ! - -78770"- - - Ol_]~ ~ "

~o ~ ~ a r , ~ - -'- . . . . ~ ~o " ' ~ : ? ~ . . . . .~,-~-~ . . . . . ~ - , -~ . . . . . . . r~--~'--~ l--- .~ ~ .... ~ . 6 3 - ~ . - - ~ i - 4 ~ - -

- - - - - : - : : - ! - : : - - - . . . . . . . . . . . . . . i - - : _ - : : - . . . . . . . . . .

6 8 8

NFPA 54 - - A99 R O P

P~PEN01X F FLOW OF OA5 THROUGH FIXED ORIFICE8 TABLE I r-1 UTILITY GASE~

i _ _ _ I I

. . . . . . "6,,-'rr;',, o-0 = . _ _ _ - - ~',Zl HO. MM =n Ir',~,l~a ]

: I z7 . . 0.14400 I 54,36 ] 5~,71

3.70:0~14.~g7 ' SS~:,3 ! ~1::}.(:~ 2f~ 0.14700

3.7s! o.~47eo . 2 5 : O . 1 4 ~ •

~7-$0' 0 ,1 "~ t 24 0.1 .r~00

3 . ~ : 0.15354 23 " 0.01540 .

0.15525 • 2 0,15700 :

4.00 O.1574,8 i 65 01 o.ls_sqo [ - ~.z~

, ] ;.

Pmuu~.e. ~t Ord'tcz .- InI:;t~-a Water Column 3. " "- - . - - " ' - .~ ' " - - ~ - " ~ ; 5 i. 5' 7 ~ ~ l ~

Q2,T/' ! 70.17 : ~15~-B7 ! 83 CT3 88 77 64.23 I 71.81 ~ 7&57 8~.g7 gO.~V~

57 O~ ; ~ .6 '7 " 65.5)3 ' 73.71 a0.74 87.21 93 2 0

~ . ~ , ¢3,37 ¢ 7 7 s ] ~ T S e298 ! eg.G3 " - ~ . e t 60'r-,7 - 1- ~ .42 8g.93 1 7g-Tg- a5.1~ ! 92.52 g8 go

67. 17 ~ ~ r s - - - - - ~ ' T 7 ~ ! ~ . ~ ' O7.~Z 94.~7 1C152 54 00 | 69.13 73.90 '; 0 - 2 . - - ~ . ~ 0 _ ..'~1 97.70 " - 10 '4 51 ~ , G t ; ~ . 7 0 " 74.6t ! ~ , 4 ~ I 9 ~ 5 a ~ g8.7o ~o~s~

70 .,Z2 i 75.07 83.9,3 '~1.94 ' 99"-3"1' : C6.16, I 7 1 . ~ i 76S3 ; 85.5~ 93.72 101"23 ' I 0 8 . ~ 2 1

1 2 ; 0 - - (.~15100,_~...5795 t 7 3 . 3 9 ~ 76.46 I 07.72 - 9~0~ ; 103.79 "!" 1~0.95

t g O.I£=GO0 7 ~ ' ~ ~ 78.02 : 83.41

96 3S , 101 5G 9t~ t 2 : 1 0 3 4 2

Olg .~ 104 24 IO1 48 106 E~ le~.~:z T~-~07:1~, ~o4 cjo , . ~ : c704 : - ~ 3 ~ s:~

!1U0~ ~ 110 05 ~tt()'~ l 11) '97 :12.B0 I liB.~

'~ 14.79 ~C2-T:--.oo i

1 1 7 . ~ t 124.O6 11830 ! 124 70

4 2 5 o1673o i ; 3 ~ 79.5~ ~ 850o

~1K~4

4 ~ 0 . 1 e ~ : ."5.11 ' 81.13 ~ . 7 3 18 0 . I ~ ~ 7~.31 ; 01.35 06.97

0.17188 i 7 7 ' H 8:3.65 :, 89:42 17 : 0 .17XR : 7~.=5 e.4.74 ~0, ,~

4 4o: o . 1 7 ~ 3 ' - - ~ e ~ - ' - " - - ' e 4 - - e ~ ' - ' - - ' - ~ - 16 . 0 IT/CO a3Z'3 88.7 '( " : g.4.83

93.26 i I02-1~ I10.34 I ' ,7 .g6 125.1; ~ t31.88 g5.04 ; 104.11 ! 112.45 ;20.21 127'5: i 13440 ~ . g 7 ; 11~,~3 ; 114.74 : ' z 2 r ~ t3O. lO I 137.14 87.23 ! 106.51 i 115.0~ . ; 2 2 9 9 131045. i 137.5(] 0 9 . ~ : 10~,52 :'--i'1"B'~'2~----:¢2"6"~6" 1;u. 13 , 141:39-

" T 0 1 . ~ 1 1 1 . ~ : 1;)0 16 128 45 "3"6 2'5 ' 143.62 I06.0]- . 116.14 12545 :.-~4;1 ".;2.~3 ; '~994

;..c-C~o~.-'717 a i 2 e M.8~ 9,3o~ I ~os.~. ".153~ L 125e9 ~34::~ ~4~.5, " ~so.2~ 15 i 0.18000 84 93 91.74 96.07 10965 120.11 I 12g."?4. 13,~ 70 "t4,*'.!'~ 1 - . ~

,c.c,c~ O.lS't:o "-'as~ ",Ez"ET~ 992"- '8 1-,~.o0 121:59 t 1:]1 33 ~4C4,~ :,~'-J~ '~cJ;.97 14 ' 01820C 0680 93?9 10,327 112.10 19000 I 1 3 2 ~ '~a4.80 • :S040 ~ ] . 5 3

- - - t - ~ - - - - i D.IOr~O0 - ~ - : 7 2 - - - - - ~ . . ~ - - ' . 1 0 ' 3 . G 0 11~ ' .8 "~ ' - -1~ 'GB8 I 13704 1 4 6 5 ; ; 5 5 3 9 "Y-(~'=J-~'J-"" ~7oi o t ~ i - a~7¢ ~ . ~ 4o3.Ga 1"11s.I~" : ~ '~7~ ~ T ~ T ~ I , , ~ 5 7 ' ~ .... :63.87 ~,.75L0.1870~ . 91.84 g8.~9 ' l e S . ~ J ' l 118.31 1 ~ . 6 0 138.98 1 4 8 . ~ ' 1.~.73 ~ 6 7 3 2

!]/16 j 0 . 1 8 7 ~ 0 <7"~.:~ ~O.~l i 1(~.42 118.~8 i 130.33 140.78 1C,3.50 : I~8.63 1 ~ . 2 0 4.80i 0.1~(U~_ .O.3.61 ;01.12 1 108.10 120.00 = ~ 132.3'9 14300 152.87 ' 162 1 5 - ~70.e2 1

12 ! 0.18~00 9 3 6 4 101.14 ' 108.12 ~ 120.8g 132.42 143.03 ~52:91 i6Z.19 170. '~ :I " 0.ISI00 ~.b-3 I00.~ I",0:&2 I IZ3.40 ~ 135.Z4 I 1~I~'Od ' I~.I~ :--I~.(H 77460

4.90:0.1S2<J1 97.56 105.37 , 112.65 1 2 5 . ~ 1 3 7 , 9 7 " ' 149.02 i 159.3T : T~.~ " - ; ~ r B T T ",0 ~0.193,5o I 9o16 i 10~.01 i ~1~.,,~ i 1~B.71 i, 13O.m i 14o.o3 ] ~ao~e " ~ ' ¥ ~ o - -

; , 1 , ~ z 4 ? ~ I s 3 . e ~ I ~ . ~ "--~-74.4-2 - ~ - d 6 ~ - 0.19600 ~0070 lOe,m . 1~6.2e 13o.oi .~ 14 .3T's.~ 1 5 ~ ~ ~ ~ -~"Sdi 0 . 1 ~ : '~01 58 t " -~ '~ .72 i 117.2~ 131.14 ' = = . . . . . . '7 1

0.1ggO0 10381 112.13 : 119.87 134,02 146.81 '; lr-~'~' 1 16952 1 9.01 e 8 5 3 S : ~ O - O . ~ 7 g - - f ~ 6 8 - - - 1'14.15 122..03 136.44 ' I . ~ 9 . ~ - ; 16~4'3 ' i 7 2 . ~ : . - i ~ - ; ~ . ~ $ - -

"~."0.2=0100 1(~91 114.39 122.2:9 136.73 149.78 ! 161.78 ~ 1 7 ~ ) ~ 1~: ' t .4 .4 " ~ . ~ 1 3 ~ T " - O ~ I O ~ 1 5 i '~1682 124.88 139.~J ""~S~---~-"' i t~,¢~.z'~ • t7G.~;| ~1~'~--~"~"-~7.---.'~

~.20[ 0.;~I 'Z3' ' ] 't-b";9.'97~ r 11G.G'7 12G.g7 141.04 I 1.~.~B.._J 167 .83 • 1'79.42 190.30 205.59 [ 0.20f: ,~ I 11070 ' . 119.~7 ! 127.83 142.92 I 156.56 I 169.10 i i8~0"71]~:~, i91 7 5 I 202.12

5.30_1 0.20680 ~ 114.13 123,28 i 131.79 147.35 i 161.41 ! 174.34 : 10~.30 ~ i97-59 I 20~..'m

5 0..21260 ~ 11848 1-2-7"96~-136.81 " ' 1 5 Z ~ j 1~"t,5,6 ~ r . l ~ ': 19'3.48 ] 205.2;7. ! 216.32"-- 3 ' 0 . 2 1 3 0 0 - 1 " ~ 9 3 12B~6 1 137.3,,3 '153,5"4 I -1~B.19 t" 181.b'?--'! 194.21 ' :20~.99 2,7 .14

S .~"{-'O,~-~=~.~.~ S,ZT-9~- 13;2.76 i 141-(~'~ 15,8.G~ I 173.1~ ! 1111/.75 I 2~3.71 212.00'" ;~4L'~O 7/'32 !'--0."21"~,75" • 12"5,4-4 !' 13549 ! 144.85' 161.94 i 1'77.40' ; "19161 I' 204.84 " 2172~7 - ' ; 229.02

"5.60! 0.22047 ! 127.42 1 137.'63 '~ i47 .13 i5-4:50 1~O2g ' i .oe : ~ , , o : 2~2,G4 2 , O.22'100 128.03 1 1'3~.29 J 147.84 165.2~ 18t .0~ 1 ~ . 5 7 I '~g,.O~ ' ~ 1 . 7 6 ' ~3.]'.'78 - I 13:~Ol ~ t42.~;§ !~;~.4~ ~70.~13 I 186.89 201.65 ~ 216.67 22865 ~ 2-4"f02

5.751 0 2 2 ~ 0 13J,3"2 145~.(~8 - } , 11Lq.95 ) ~ 5 . 1 7 1 21~.34 232.6,5 ~. , ; 155 10 173.44:) = ' * 245.Z~ ._ .!" . i 0 .7 - -2~ ' 1 3 6 . 2 . / 1471a ! I ~ . ~ 1 1 7 5 ~ ( ISZ.TZ J ~ . I ~ ~ ~ ' O a j Z;~6.03 (-2.,-e.7~

6 8 9

N F P A 5 4 - - A 9 9 R O P

(Log #N7) 54/Z223.1- 160 - (Table F-I and Table F-6 (New)): Reject Note: This Proposal appea red as 54-89 which was he ld f rom the

Annua l 96 ROC on Proposal N/A. SUBMITTER: Dick Hanna , Bard Manufac tu r ing Co. RECOMMENDATION: 1. Add the following s ta tements u n d e r Table F-1 head ing a long with the specific gravity', orifice coefficient, etc.

"BTU per cubic foot=-1000 For utility gases with o the r BTU content , adjust orifice selection based on Table F-6."

2. Add new Table F-6 as follows:

Table F.6 Multipliers for Utility Gases of Another Btu Content

Btu Content Multiplier Btu Content Multiplier

800 1.250 950 1.052 825 1.212 975 1.026 850 1.176 1000 1.000 875 1.143 1025 .976 900 1.111 1050 .952 925 1.081 1075 .930 950 1.053 1100 .909

Example 1: Orifice selection needed for 25,000 Btu at 3.5 in. pressure and Btu per c u f t of 1000 = 3 /32 in. dim drill size (24,890) Example 2: Orifice selection n e e d e d for 25,000 Btu at 3.5 in. pressure and Btu per c u f t of 900 = 24,890 x 1.111 = 27,672 Choose closest size f r om Table F-1 wi thout exceed ing 27,575 = 2.50 MM drill size. Example 3: Orifice selection n e e d e d for 40,000 Btu at 4.0 in. pressure and Btu per cu f t of 1050 = 2.90 MM x .952 = 87,566 Choose closest size f rom Table F-1 without exceed ing 37,566 = No. 34 drill size. S U B S T A N T I A T I O N : 1. The values in Table F-1 are based on 1000 Btu per cu f t , bu t are not so noted. T he pr imary use of this informat ion is to gu ide installers and service persons in sizing (or resizing) orifices for various gas appliances. A m e t h o d is n e e d e d to compensa te for different hea t ing values of utility gases tha t exist t h r o u g h o u t the count ry so tha t the mos t appropr ia te orifice for the available gas can be selected.

A practical solution to e x p a n d the funct ional i ty of Table F-1 is to add a n e w Table F-6 with examples , and to add an addit ional no te above Table F-I ms has been d o n e for o the r variables.

2. Addit ion of Table F-6 will make Table F-1 consis tent with Table F-2 which takes into accoun t LP-Gases with d i f ferent Btu contents . The only practical use for ei ther F-1 or F-2 is to select orifice sizes based upon the variables effecting the f ir ing rate of the appliance, and the BTU con ten t is pr imary in tha t de te rmina t ion . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: A spot check of the proposed table entr ies was found to be incons is ten t with da ta available at In ternat ional Approval Services. T h e commi t t ee would consider reversing its act ion if the basis of the calculations are provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


(Log # N l l ) 54/Z223.1° 161 - (Table F-2 (New)): Reject Note: This Proposal appea red as 54-90 which was he ld f rom the

Annua l 96 ROC on Proposal 54-235. SUBMITTER: Dick Hanna , Bard Manufac tu r ing Co. RECOMMENDATION: See new Table F-2 (shown on following pages) tha t includes bo th metr ic a n d fractional drill sizes in addi t ion to n u m b e r drills. Also inc luded is decimal equivalent in inches for each drill size ready for cross-reference a n d verification purposes .

Informat ion also added to cover appl iances ra ted a t 10 in. instead of 11 in. previously shown. S U B S T A N T I A T I O N : Many appl iances are now des igned us ing orifice sizes o ther t han drill n u m b e r reference in order to closer match rated inpu t of appliances. In m a n y cases, the inc rements between n u m b e r drill sizes are too large, and addi t ion of the metr ic and fractional sizes narrow the increments .

Original Table F-2 only covered appl iances rated at 11 in., and many appl iances today are ra ted at 10 in. Also, the re were some errors in exist ing Table F-2, and these have been corrected in the p roposed Table F-2. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: A spot check of the proposed table entr ies was f o u n d to be incons is ten t with da ta available at In ternat ional Approval Services. The commi t t ee would consider reversing its act ion if the basis of the calculations are provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 21 N O T RETURNED: 3 Bigelow, Rhead; Whi te

(Log #N12) 54/Z223.1- 162 - (Table F-4): Reject Note: This Proposal appea red as 54-91 which was he ld f rom the

Annua l 96 ROC on Proposal 54-235. SUBMITTER: Dick Hanna , Bard Manufac tu r ing Co.

• RECOMMENDATION: See revised Table F-4 tha t includes both metr ic and fractional drill sizes in addi t ion to n u m b e r drills. Also inc luded is decimal equivalent in inches for each drill size for ready cross-reference and verification purposes .

(table shown on following pages) S U B S T A N T I A T I O N : By use of the p roposed Table F-4 tha t includes all possible drill sizes there are now m o r e appropr ia te choices for the various al t i tudes t han previously shown.

Also, there were some errors in the exist ing Table F-4, an d these have been corrected in the p roposed Table F-4.

General Comment : All selection criteria based on us ing the closest possible orifice size without exceed ing 100 percen t of the rated (chosen) i n p u t be ing looked for. Also, errors were fo u n d in the original tables du r ing the process o f developing the new tables. I say errors based on the use of the appropr ia te fo rmulae f rom the Gas Engineer ' s Handbook , earlier calculat ion m e t h o d s a n d r o u n d i n g may have a t t r ibuted to some of the discrepancies. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: A spot check of the p roposed table entr ies was found to be incons is ten t with da ta available at In ternat ional Approval Services. The commi t t ee would consider reversing its act ion if the basis o f the calculations are provided. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 24 VOTE ON COMMITTEE ACTION:


6 9 0

N F P A 54 ~ A 9 9 R O P

APPENDIX F FLOW OF GAS THROUGH FIXED ORIFICES Table 1=-2 LP-Gases

Propane Btu per Cubic Foot = 2Tste

Specific Gravi~ = ] 1 52 Orifice Coefficient = i 0.9 For alt~udos abeve 2 000 feet. first seld'~.'t the

.eqivalent orifice sb D from Tabl6 F-4. j ~ i I i 'Propan¢ ! propane

Frac. Dnll Orifice D ig . ; =t 10 Incl~ at 11 Incll ~;ze No MM In inches Orifice Pressure i Odflce Pres=um

~' 121 0.10 0.00390 ' 115 0.15 0.DOSg0 ! 283 ~ 276 0;20 0 . 0 0 7 8 0 460 483

- o.ooeoo i 484 i soe 0.00900 ' 613 ~ 9~3

0.25 0.009801 727. ii 762 ' 0.01000 I 757 ~ 793 0.01:100 ~15 j 960

0.301 0.01180 1053 1105 I 0.01200 1089 I 1143

80 I 0.01350 1379 I 1446 0.35 0.01370 1420 1489

79 0.01450 .~ 16.91 . . . . 10~8 1/64 o .o1~2 i , ' le~s 1936

0.40 0.01574 ; 1874 1966 70 0.01000 j - 1937 2031

0.45 0.01770 ; 2370 I 2486 -77 0.01800 i 2451 2S7t

0,50 0 . 0 1 ~ ' 2930 3073 76 ., 0.0Z000 3026 3174 75 0.02100 3336 3499

0.55 0.02160 3530 3702 74 0.02250 i 3830 4017

0.O0 0.02302 i 4221 4427 73 0.02400 4358 4570 72 0.0~_S00 47~8 1 4050

0,§~! 0.02550 4~19 5160 71 o.n~e_oo 5114 I 5:~,4

0.701 0.02758 I E7,48 6027 70 0.02600 I 5e31 6221 69 0.P,?~25 i EI473 6789

0.75 0.02950 ] 6584 6905 BS. 0.0S1 O0 7270 7025

1/32 10.03125 7388 "F/49 0.O01 0:031~,9 7,50Z 7 ~ 8

07 10.03200 i 7747 0125

Butane

,!

e u t = ~ at 10 Incll

Orlrce Pressure

130 299 522 549

858 . . , , ,

1036 1194 1235 lSe3 1610 1003 2093 2125 2196 2607 2779 3322 3431 3782

3.280 2,01 0.9

a m = n = at 11 inch

Orate Pressure

137 313 547 576 729 664 900 1088 1253 1:295 1639 1688 169! 2195

2220 2303 2010 2915 3484 359B

I

3907 4002 4197 4342 470,5

5360 5~//" 5798 6515 6724 7338 ~ 7464 8242 8578

4,554 501~ 5181 5822 5849 6081 8832 7052

• 7696 7828 8 M 5 8785 8920 9211

6505 876,3

69]

APPENDIX F

Frac. Drill

FLOW OF GAS THROUGH FIXED ORIFICES Table F-2 LP-Gases

Orifice Oia. Size No. MM

3/64

1116

in Inche=i

0.03500

Propane at 10 Inch

Orifice- Pressure

Propane at 11 Incr,,

Or i f i ce P ressu re

N F P A 5 4 - - A 9 9 R O P

Butane i at 10 Inch ! Ori/i~_,e Pressure

Butane at 11'inch

Orifice Pressure

66 ; 0.03300 8239 8641 9340 9796 0.85! 0.03340 8440 8852 9568 10035

9266 0.03543 0.03600 0.03700 0.03740 0.03800

65

64 63

0.90 9720

9497 9805 10357 10582 10925 11507 11726 12105 12718

0.95 62 !

9960 10283 10863 11099 11458 12069 12299 12696 13338

14877

61 I

1.001 0.03900 0.03937

10507 10766 11115 11742

1.1019 11292 11658 12315

60 0 .04000 59 0.04100

11997 12582 12385 12989 13045 13294 13723 14418

13882 13943 14393 15121

1.05! 0.04130 12904 13534 14629 15343 58 ; 0.04200 13346 13997 15129 15868 57 . 0.04300 13989 14671 15858 16632

16211 17157 17431 17707 16883 19207

0.04330 14t 84 15457

1.10'

16358 16620

1.15:0.04520

18313

50 , 0.04650 0.04687

1.20:0.04724 i.251 0.04-920

16080

1:3o i o.o5118 i 0.05200

1.35t 0.05310

19818

17523 18545 18841 19140 20761 22467

16865 18378

0.05500

55 20457

1.45 t 0.05700 ~.5o I o.os9oo

= 0.05950

21332

26335

20785 21456

28091

22373

19450 19761 20074 21775 23563

23192 24324 24183 25363 25945 27211 54. i 22886 24003

1.401 ~05510 L22969 ' " 24090 26039 27310 24560 25780 27866 29226

27021 29856 31313

29525 28784

30995 1.55] 0.06100

53 28151

30364 31846 31914 33472

29553 ] 0.06250 33503 35138 1.0OI 0.06299 30018 31483 34030 35691

52 0.06350 30506 31995 34584 36272 1.65 0.06490 31866 33421 36125 37889 1.70 0.08692 33680 35534 38409 40284

51 35619 38501 40380 37559 42579

0.06700 33961 1.75. 0.06680 t,. 35811 40598

i

£)92

APPENDIX F

N F P A 5 4 ~ A 9 9 R O P

FLOW OF GAS THROUGH FIXED ORIFICES Table t='-2 LP-Gases

Frac. Drill Size No.

.50

49

I i 48

5/64

P r o p a n e at l01neh

Propane at 11 Incl~

Orifice Pressure

38880

B u t a n e

L_____I ,1.

ar~nco 0,a.' MM ;n Inches

i

10.07000 1.801 0.07O88 1.85 o.~728o

0.07300 1 .90 0.07480

0.07600 1.95'. 0.07670

0.07812 I

0.07880

2.05i O. ,08070

2.10! 0.00100

2.15J, o . o ~ o 0.o .800

1

2.20~ 0.06001 2.25, 0.0885O

i 0.08900 z,w, o,0W~o 2.351 0.0~250

O.O~GO 0.09375

I

~-,40, 0 . 0 ~ H 8 ! 0.09o0o

at 10 inch Ot~ce Pressure

42020

i

Butane St 11 Inch

Orifice Pre=sure

44077 : 39841 43065 I 45187

4 2 0 ~ 4..~456 ~ 47674 1

42284 45706 ! 479~0 , 44395 47907 ! 50330 l 4~831 4g539 I ; 51957 , ] 4 6 6 7 9 5 0 4 5 6 'i. 4 8 4 2 4 .i 5 2 3 4 2 ; 4 8 8 9 6 ' 528,52 4 7

I

ZOO[ 0.07874

Odfme Pressure

37071 37987 4OOO6 40316

I

, 42328 43698 44607

. 48170 48820 48906 49270

I

t

I 54147 , 55954

50751 t

59255 I

;, 58926 §1903

, 64732 l 98t3o

66494 i

' 875;33 I

', 69723 703O6 !

"' 77942 !

782~8 I

81828 I

i 8 5 4 8 8 85810

I

, m 88571 f g0540 i 91542

91942 ' t 83214

46

49195 53170 51675 ,. 55856 _ ~ . - _~ - . . . ,

52060 ' ~ZTZ 53353 57670

I 52~!s

I 55432 55771 58582 59019 60485 45 0.08200 50870 I !

0.08267 i 51705 £4229 $8816 ! 61477 ' 6 1 3 8 5 ! 64381

44

43

42 3/32

6 3 4 3 4 ; 66530 64337

56790 58685 59521

87175 674TT 70454

41 2.45 ! 0.09640

62147 I

62651 67937 71252 I

64|N|8 70Z40 73074 07892 73385 ~ 70987 6 0 3 8 8 6 9 7 3 9 70828 73127

74080 75382 76560 79043 79704 73737

i ' 78840 I 79o81

80297 82902 83594

40 1 0.09800 , 72659 76205 82371 , 86392 , 73283 70800 83078 , 87134

39 74900 78556 84912 . 89057 81748 03137

8 8 3 8 0 92673 69~64 ' 94250 92766 ; 97294 08015 97280 100410 1O2042 103779 104232

, 105~74

85822 8 9 6 6 0 8 9 9 9 8 92894, 9 4 9 5 9 96010 e6430

38

37

36

7~4 35

34 ;33

2,50j 0.098'42 , o.o,995o 0.I0150

2.60 0.10236 I

O.1O4OO 2.70 f 0.10630

O. 10650 2 751 O.lO~.0

0.10940 I

I 0.11000 ~80, 0.11024

i 0,11100 0.11300

97764 101319 r 109517

101845 102028 106311 107052 108844 1O9320 1 1 0 ~ 2 114882

693

N F P A 5 4 - - A 9 9 R O P

APPENDIX F FLOW OF GAS THROUGH FIXED ORIFICES Table F-2 LP-Gases

!

I Frac. Drill : Oflfice IDI~. Size No. MM ' . in Inches

1/8

32 2.90: 0.11417

Propane I at 10 inch i

Orifice Pressure i

~014 0.11600

3.00' 0.11811 0.12000

3_1o 0.12205 0.12500

3.20 0.12598 3.25 0.12790

'0 .12050

g~4

101801

Propane _

at 11 Inr~ Odfice'Pressure

Butane Butane at 10 Inch , at 11 Inch

Odflce Pressure I Orifice Pressun=

1034Z0 . . . . i- 108770 115409

, 117253 121042

105538 110689 119646 125485 31 100943 1142~}0 123505 129534

112697 127781 133997 118211 120071

- l i 3 ~ S 9 " - -

118198 123980 ~ 134012 125932 ~ . _ 136122 12980Q } 140302 13102t _ 141022 133932 i 144769 142179 t , 153683 1 ~ 7 0 ~ I 1 5 ~ ' 150672 ; 162863 ,

158834 189308 , 156902 159388 104535

~0 124923 3.3o1' o. 12992 127899 3.40 o. 1338~ 135562

29 0.13000 131~J1 3.50 0.13780 143660

28 " 0.14050 t40¢J49 O. 14062 I

3.(50 0.14173 t 27 0..14400 [

3.70 O.14,567 O. 14700

;175 0,14760 o.1495o I

149600 151971

189597

177848 15a878

140553 142765 147150 148534 151835 161184 100~7~ 170812 177571 177875 180694

100638 168373 181997 190880 26 103483 171462 • 185335 I 194381

104620 17Z~4 1~651 I 195971 --- 25 169090 177344 191693 r 201049

3.80i 0.14981 ! 169339 177fi05 : 191975 I 201345 174793 183324 i

1 ~ 7 ~ 186482

198158 I 207830 187058 202193 I 212062 188180 203407 I 213335 193719 i 209394 195584

107624 190701 i 212703 2ZaO05 191263 200598 218829 227412 196105 205677 222318 233170

24 0.15200 1

3.90 0,15354 I 178353 0.1~100 I t79423

:~ 0.15625 0.15700

4.00 0.12746 o. 15900 0.16100

4.10 0.1(]142 4.20 0.18,536

23

197129

22

21 20

19 ] 0.18~)0 4.25 0.16730

206870 20~751 216967

;H:~Z 211753

218650 222088

5/32

227403 227867

L~ 219614 211409 ~ --221727-

2234~0 , 234388 234523 " [ 245969 236341 ; 247877 240058 i 251775 245602 257800 4.301 0.16029 216820

18 ~ 0.16g50 217358 1/04 I 0.17188 23.3492

17 0.17300 I 226427 234400 253366 237479

246413 ~ 258440 265~33

256694 i 269223 4.40! 0.17323 I 227030 238111 ' 257377 ~ 2 ~ 3 ~

18 I 0.17700 I 23701g , 248588 268702 I 281817

694

NFPA 54 - - A99 ROP

APPENDIX F FLOW OF GAS THROUGH FIXED ORIFICES Table 1:-2 LP-Gases

-- , I I

iFrac Drill ] Orifice Dia. p

Size No. MM ] in Incl~es

15 4.50

14

6.17717 0 . 1 8 0 0 0

237475 I 249065 'i

[

Propane t prop, ,ne ~ Butane Butane at 10 Inch I at 11 inch at 10 Inch at 11 Inch

Odfice Pressure Orifice Pressure i Orifice Pressure Orifice Pressure

4.60 0.18110 I

0.18200 I

245122 248127 250599

13 0.18500 4.70 0.18504 4.751 0.18700

3/16 I 0.18750 1 265974 4.80] 270189

258929 259041 264557

270247

269218 257086 I 277887

282358 291451

260238 : 281294 t

202831 284097

277470

271567 I 293.-~,0 271684 293667

299921 278956 301527 283377 306306 283437 306371

295024 297963 307887 3o8oo6 314580 316244 321250 321324

} 0 .18898 --~E I o.lssoo 11 ] 0.19100 275996 289467 312669

4.901 0.19291 281544 295286 319178 10 0.19350 297095 321134 336808

304821 329485 T. 332349

339649

283269 2 9 0 6 ~

328101 334757

345567

13/154

9 0.19600 293102 307471

314224 5.00 0.19~85

8 0.19900 299601 , 5.10 0_20079 305015 319902 345786 362664

=

7 ~ 0.20100 305653 320572 346510 363423 0.20312 0.20400

J

5.20 0.20473

312135 314845 317103 319492 322922

0.20550

329204 330488

327370 353858 330212 356931 332580 35~490 335086 1 3 6 2 1 9 9 ! 338883 I 366087 345272 'i 373209 I 3~6598 : 374642 . 358041 * • t 387059 i

343238 359992

5.25 0.20~0 5.301 0.20860

i 389 i 19 , 372057 - t 402161 ! 379690 i 410412

! 416891 385684 387541 3995g3 4 0 6 3 5 2 4 1 2 4 8 0

348571 356226

. . . . 439231 44585~

371129 374352 377036 379878 383955 391425 392928 406580 408112 421790 430443 437239

418898 439344 431925 453007

46o669 467010

. . 4 , 0 . 2 0 9 0 0 5,401 0,21260 341950

3 0.21300 5.50 0.21854 354742

7/32 0.21875 382020 5.60 0.22047 367736

2 0.22100 389506 5.7"0 0.22441 380997 5 . 7 5 0.22R__'Lu3 3 8 7 " 4 4 1

1 0.22800 I 393284

695

NFPA 54 - - A99 ROP

A P I ~ ' N O I X t : £quw~lent On~c¢ ,~zc,,= ~t High Alt i tude= l-a~e i -- .4

. . . . . . . . . . ~!_n_e!ud~ 4_Z'~, i~,'__~JVrmo_n for ~en ~.o~_r~_~_J___. l

~ _ . ~ ,~1 ~-__~_- ,~__- : . . . . - - rac. DnlT- . . . . . : Orifice ~Ts- . . . . .

S ~ ~Io - ~ M :-]~ncn~ ZOO(] 3000"

0 iO 0 0 0 0 9 0 - - o ~5 O 0 0 5 ~ g 0 2 0 0,00780

0 .00~00 0.000(30

-'--- o ~ 5 0 . 0 0 ~ 0 0 . 0 1 0 0 0 0 . 0 1 1 0 0 ..

301 0 0 1 1 8 0 o 0 ~ 2 0 0

ERR .I~JMM 15MM

, iOMM 0,006 0,0~9 0.009 0 0 4 ~.91~ 0 0 1 1

~ o o o - - - 3 0 0 0 . . . . oooo ~Oo~--~ ~oo0 i~ooo . . . . ' ,~,.~c =

ERR ER-R . . . . E R I ~ - - ~ - E R R - ~ E - R - R - - - ERR ERR :ERR ]_OM_M I O M M 10M.M i . I O M M I O M M I O M M - - ~ 1 - 0 ~ - - - ' ~ M I ~ M M . I ~ M M 15MM I " 1 5 M M .-I-~M~ . 1 5 1 ~ M 1 5 M M ::~-t~;1M 15MM 1 6 M M ~~-MM I . I ~ M M - 1 5 M M l O M M , I ~ M M - - - - ~5"-MM

~ . 0 0 6 0 ,00~ 0 .008 O.O06 0 , 0 0 8 " ' " 0 008 .20MM . - : ~ t ~ M 0.009 O.O0~ O.OOe O , O 0 9 - - - ~ o O ~ - - - o ooo O,gO~ . . . . o-o-o.ff .... u ooo 0.01

0,00~ OoOOg : 0,009 ' O,OOg O.O0~ O00O ~ ~Od 0 . 0 1 0 . 0 1 0 0 1 ] 2 5 M M . . . . O . O O g O . O O g - - " - ~ 0 9 - -

0 .0 !1 0,011 {; 011 0.01 0,01 3 , 0 1 1 0 . 0 1 1 ; , 0 1 1 0 011 0,01

0 .0~ i o .01 J-,j" - 9 0 1 • a ,q t ---,~ ;~ • o . o 1 2 i 0'?'011 ,-'~.'~~ ' 1 0 0 1 2 - - - ] 3 0 M M 9,3 ~' o . - - ~ I oo12 ~:~ '

1,/~4

lrJ2)

80 0 .01350 0 0 ! 2 3 .012 0 .012 O 35 0 .01370 . 0.D~2 _ ~ 912 0 .012

7~ 0 .01450 ' 35MM -JSMM 3 5 M M o o ~ - - - " -- 7~ . . . . . ~ - - ~ - -

0 4 0 0.015-7-4 ' 70 79 79 78 0 0 1 6 0 0 i ~ 4 70 79

0 .45 . 0017"7.0 78 ~8

77 , 0 0 1 8 0 0 " ?~ . . . . . 7~ 0.50~- 0 . 0 1 ~ 8 . . . . :';'7 r~

76 j 0 .02000 T7 75 ' o 02100 ~5 " zo

0.551 0.021'00 75 f8

O 012 0 .012 o.o42 0 0 1 2 0 .012 ] 0 0 1 2 ]

": s b - ~ 0 o ~ 2 ' o o i 2 ~ -t9 L 3 5 M M 3 5 M M .35MM ~; 80 $ 3~2 7g I ' 79, . 35MM " 3 5 M M • 3 5 M M :-- '~-,~'2 . . . . . 79 ~ 79 79 3 5 M M .35MM ~10

78 7`6 ; - 7 6 78 78 I/~, % 77 / '7 77 A 5 M M 78 /'8 .'~

- 77 7"7 ~ ..... "~"{ 7*/' 4~h/ l~ 7{~ ,'-~- -

5 0 M M 5 0 M M 77 77 - - 7"7 77 -~.SMM 7e r ~ ' . 5 ( ) M M ~ 7"7 7"7 • 7"7 " : ' : ' - "

74 . . . . - , - .~r ' 0 .02250 " : 5 ~ i ~ . . . . . . . . . . . . . . . . . " - - ~ I ~ M - - ~ : : ~ 7 5 ~ - - 7 5 5 - ~ , i - . 76, 7e . . . . 76 " - - - ' .~?- - - - " . . . . . /,' . . . . 0 80~ 0 .023~2 T4 /4 . 55MM 5 $ M M ' , 55MM 75 - 7"5 . . . . 7@ . . . . . ~ - -

73, , 0 0 2 4 0 0 74 . . . . . . . 7~4 . . . . . 7~- - . . . . 5-SMM 5 5 M M 5 5 M M 75 76 _ - : _ ~ J : ._ / 2 74 ' .-35'M M ' 5 5 M M "5

7 !

- - 7 0 09

68

0.0 '7500 ,-"3 .'73 OOMM 74 74 3 R5 0 0 2 5 5 0 ;3 73 73 ~OMM 74

' 0 ~ 2 6 0 0 7 7 7 2 7 3 7 3 6 0 M M

,3 70 0 0 2 7 5 0 . . . . . ?~ - " 7 " - - - - ~ - " - 0 5 ~ I M 72 0 .02800 /'~ ;'1 71 ' 7~ ~"~. 6 ~ - "~ " '~ ' o 02925 70 70 . " 7 " ~ t i - 71 71

6 7 r - G - ~ ' s - o - - " - ~ . . . . . ~o zo 70M~ 71 0 . 0 3 1 0 0 ' 75M1~ " -~;~;-MM :TSMM ! 70 70

80~ 0 03140

68 ~ 0~300 0.8~" 0.03340

85 b 6~00

64

63

6~

5g

0.00' 0.03S4:~

. 75MM ; 5 M M . 7 5 M M 7 5 M M "70 '~Y32 7 5 M M 7 5 M M ?aeMM ,7~MM

~ SM,~, ~SM.M. 0o I.-- ~7 67 .SSMM 8 5 M M , .8~;MM i 68 87

74 74 . . 55MM 5 5 M M 74 74 ; 74 5 5 M M /'3 73 , 73 ~'4 72 73 73 3 ~ M M

7 1 • 7 1 E i 5 M M . ' 2

- - 7 0 - - - : . 70MM 71 7 ' 70 ; .?OMM 71 ' 7 , ~o ~ ~o 71 , 7.- ~ b - ! - Yo - . Y o M i ~ . . . . . :,~ - "

I /

l 67 .BOMM . 7 5 M M ;SU.M 0 0 3 8 0 0 05

i 0.03700 64 ..... , - gOMM I 65 0.g5! 0 . 0 3 7 4 0 _ _ 0 4

I o 0 3 8 0 0 03 I 0 . 0 3 9 0 0 6"2

1.OOl o.03~37 82 ~S---MM i ,~s~ I 0.04000 6~ . . . . . 52 I ~'2

_ __ 0 . ~ . 0 ~ (::10 I OOMM ~ 81 o5~ o .o413o ao I ~ M - ' - ~ - ; b ~.

7 5 M M . .~ C k-', M

B5MM ~ .BSMM..~ 8 5 M M 66 i 67 87 ! r 32 g S M M .85MM 8 5 M M 07 67

@4 :, ,gOMM ; (~5 . B S M M , 8 5 M M 88 0 7 .64 .~ " -84 gOMM 65 8 5 M M , .BSMM 06

~ 5 M M 83 .R,4 ¢JOMM 8~ . 8 5 M M .¢35MM ~ O S M M 84 84 , (]OMM 85 8 5 M M aSMM

.~SMM , 64 84 .OOMM i .SSMM .SSMM ~ .g~MM ; 63 : 64 , .OOMM ~J~MM :32 ~ (]2 ; 0 5 M M 64 .gOMM --55 J __

58 ; 0 . 04200 50 60 : 1 . 0 0 M M ' ,OOMM ' 62 57 o . ~ - - - ~ - ' - - " ~ r S - " 1 0 ~ M I ~ Z ~ - - ~ a O ~ - d O ~ , ~2

- ~ - ~ (] : 0_04330 ~B ! '.]~MM 5Q ,30 ~- I "OOMM- . ' - - -61 -~.IS OTO-4--~ : 1ouu : :OMM : ~,7 .:,A -~-os-~-- .... ~0

83 i 6= --grbMk,~ 92 .gGMM -34 62 .QSMM .34 80 , I OOMM ~ )

3/ f i4 . _ _ ~ . . . . . . . : 0 . 0 4 8 5 0 1 1 S M M 1 I O M M ' 1 .10MM 1 ,10MM : 58 58 1 .05MM ' 80

0 . ~ . ~ 7 ~ . l s u u 1 1 5 M u ,= 1 , t o M ~ . 1 . fokA~ l -T - - .~ - . . . . . . . . ~d . . . . ~-~-5MM ~ 8O ' .OOMM ! O O M M

6 9 6

NFPA 54 - - A99 ROP

APPE N{JIX ¢ Equ ipmen t Onfw:e S = ~ .1 t t l l l h / ~ t u d e s T ~ble F -4

L = - - - . . . . . . . . ~ ; i r - o - T ~ . ~ o 2 ~ , ~ , =, c,-e,~-~_.~..,.~ "

~ . ~ s ~ ' f -T -5 "~ /e l - - ? ;5 l~N I " ~ ~6~,l--IV~-~~b'~-"M .'>8 - ~ S~- . . . . . . ~ 0 - - - - I

i

IF~a(: t3,,lI ' O ~ e D,a.

i

1 7.5 0.04~20 1 30 0.05118

! . . . . ~D . . . . 0.05200 L

F ~35 0.05310

1 2 0 M M 1 2 0 M M ~ ! 1.~MM . 1.1~MM ~ ~P, UM t ~OMM I ~;8 i ~ .05MM-

1.25MM ~ 1 25MM 1 25MM i 1T20----M--M-~ 1.20MM C ~1 I~;MM I 1.1$M1~ ~.~,OOMM-

; ....... ~4 0.03500 1 35MM '. .55 i 55 1.30MM i 1.25MM : ~f~MM !.20MM .--~--.~0-~A--M, ~8 . . . . . . . . . . ~,-40"!"0-05510 1 25MM 1.35MM , 55 1 30MM ! 1.25MM ~ ~SMM ~ 20MM 1 20MM 0

~,4~i ~.00700 1.40MM 54 ~.35MM 1 3 5 M M [ 5§ i 30MM 1 ; S M M I.~.~MM--: * . - ~ . ~ - M - ~- . . . . . . . . 1~-5"-0T-'~.0~ 1 451MM ', 40MM 1.40MM 1.40-'FA-'I'I'I'I'I'I'~, 1.3"5-M-IV{ I 35,~,M 55 ' 1.30M--IV~ ~-,25-'MM-- ~ . . - - ~ 3 - . . ~ . | 0,05~00 1 4OMM 1.45MM I 40MM 1 40MM ' 1.35MM ~ 35MM ~ 1 30MM :-~'~5-'M'M-

55; 0.00100 5,3 ! .45MM I~-~M,-M I 45MM ~. 40MM ! 4OMM ~.35MM i 1 .3gMM ~ 30MM ' " ' ~ . . . . . . . . - - - . . . . i °'°~-8=~-° • ~6MM ~; : ) 1.50MM "~ 45MM 1 45MM " 4U-M~ 1.40MM 1.35MM I 3~MM

.60 0.06299 1 5"~=M~ 53 53 1.50MM 1 4 5 M M 1 45MM 1 40MM . I 35MM ~. 35M-'M'- . . . . . ~ . - 0.06350 . 1.55MM 1.5~MM 53 53 , I 45MM I 45MM 1.40MM : 1.40MM I .'t-~MM

"L85~ 0. (~400 i 1.GOMM 1110 1.~OMM ' 53 §~ 1 45MM 1.45MM ~ 1.40MM . 1.40MM 70 0.0(~02 : ~.65MM 52 ~ 52"- 1115 1.,~-M-M~- --~-3-- ' -" 53 ; 1.45MM 1 40MM

5 " 0 0 ~ 7 0 0 " ~ 6 5 M M 52 52 1116 1 5 5 M M 53 53 ', 1 . 4 5 M M : . 4 5 M M ............. ~,.TS. o.0~880 i - 51 ~ eSMM 1.00Mt~, ~ 5Z 1 . 0 0 ~ ; ~ hSMM t 5 5 M M 53 ~ 45MM . . . . . . . ~.C . . . . . O.-'----~7bo0 ~.;~5"M51M ~I 1.0~MM , Ta M-'5-MM-"I I~Z I OGMM 155MM I 53 i ~

: .~0 0.07086 " S~ 5 ' , - - ~ ~,(}SMM ~,~SMM 52 ! 50MM I !.55M1~I ~ - 5 3 . . . . . . . . . 1 .8S" 0 . 0 7 ~ 8 0 1 . 8 0 M M 50 1 7 5 M M i 51 -~ 51 "~.O-SM-'M" 52 I 1 6 0 M t ~ - I ' l 5--":~-5--I~M-

, - . . . . . . ~: . . . . . . Y s;~KI-T~6SMM I 52 ]-15---~M-- 4~ 0 . 0 7 3 0 0 1 ,SUMM 50 1 7 5 M M ' 51 .} _ 1 90 0.07480 : 4 9 , 1.80MM 1.80MM 50 , 1 7 5 M M 51 : . 6 5 M M 1,O~MM i ~Z

I - - " "-48 007800 , : 40~" " ; * " ~ 9 - - - ' - 1.8QMM " 1-80-~--~'---"~'~ ~ ,'SMM 51 1.65MM ~ ~__~ 1 95 0.076"~0 ; 1 g ( ~ ' 49 1 85MM 1 80MM i 50 " 75MM 51 " 1 . ~ ] S M ~ M ' " ~. . . . . . . . ' "t

. . . . . . . . . . . 0 . 0 7 6 1 2 46 1.OOMM : 4 0 40 =J.~eG_IVI.M.~ 50 1 . 7 5 M M I 51 ( ] 5 M M = . . . . , 1 . 8 0 M M 1 8 0 M M 1 7 5 M M ' 51 1 . 8 5 M M 47 0 . 0 7 8 5 0 1 9 5 M M + 1 8 0 M M , 4 9 49 • ~ t

2 . 0 0 0 . 0 7 8 7 4 1 . g S M M : 1 .gOMM 1 , ? O M M 4 0 = ~.BOMM : . 8 0 M M 50 • 51 51

I V'32

46 45

44

43

42

36

2.05 0.06070 2.00MM ; 1.gSMM 1.95MM ' 1.9"OMM ! 49 40 1.80MM 0.08100 " 2.00MM I ~ 1.gSMM I. gOMM ~ 49 49 1 8 0 ~ M 0 .06200_ : 2.00MM I 2.00MM I 1.~5MI~ 1.g5MM ~ 1 . 9 0 M M " 411 .... 1 85MM

~ . t 0 0 . S ~ . ( ~ ? i 2 .05MM L 2.00MM j 47 1.gSMM " ' 48 ' 1.90M, M , 40 2.'1.~ 0.:0~4~1 i ~.10MM . 48 i 2 .00MM 2.00MM . 1.95MM 48 . t . 90MM

0.06(500 ; 2 .10MM , 2 .10MM i 46 ZOOMM ', 2.00MM 1.95MM , 48 2.2( 0 . 0 ~ 1 I 2 . 1~MM ~ 2.10MM 4S 46 ZOOMM 5/~4 ' 1.gSMM 2.2':; 0 .08850 i 44 2.15MM 2.10MM 2.10MM ' 46 - 2.00MM : 47

O.08QO0 ; ~_~6MM ' ~ . . I ~ M M 2 . 1 S M M 2 . 1 0 M M ~ 4.~ 2 . 0 0 M M 2 . 0 0 M M 2 . 3 0 0 . 0 9 0 5 0 ! Z 2 O M M , 2 . 2 0 M M 4 4 2 . 1 5 M M ; 2 . 1 0 M M 4 5 2 . 0 0 M M ?-_3S ' O.Og2SO ~ 43 43 2 .20MM "Z2OMM ~ 2 1 5 M M 2 IOMM 45

' o.og3Go 13.~OMM 43 2.25MM Z 2 O M M i 44 2.15MM 2.10MM . 0.00375 ' 2 . 3 0 M M i 43 43 2.20MM i 44 ~.15MM 2.10MM

2.40i .0.00448 Z 3 O M M ' 2 .30MM 43 ~ 2.20MM ' 2.15MM ~ 2.10MM 4~. , O.OMO0 1 ~ 3 2 ; 2 .35MM 2 .30MM-r 43 I Z 2 5 M M ~ 20MM = 2.15MM_

C)_4.~']"0.0(W~40 • 3/32 I 2 .35MM 2.30MM ; 43 I 2 .25MM - Z2OMM : 2-15MM 4 0 I 0 . 0 0 ~ 0 0 ; 2 _ 4 0 M M ; Z 4 O M M Z 3 5 M M t 2 . 3 0 M M ; 4 3 2 . 2 5 M M Z 2 O M M

2 . 5 0 ( 0 . 0 9 8 4 2 '. ' 41 , 2 . 4 0 M M ~ 42 2 . 3 0 M M 121..~..~MM 43 : 2 . 2 0 M M 30 ; O.O09SO i 2 .45MM 4 t 2 ~ 4 0 M M " * " I ' ~ ' M - : 2.30MM 4.3 : Z.2OMM

i 38 i 0 . t 0 t 5 0 2 . , ~ M M , ~ . 4 5 M M 2 . 4 ~ M M ~ . 4 ~ M M ~ 4:} 2 3 0 M M . 43

2.60( 0.10238 30 ' Z~OMM ;~ 45MM 2.40MM t 3/'32 2.35MM : 2 .30MM 37 I 0 . 1 0 4 0 0 38 3g 2 . 5 0 M M , 2 . 4 5 M M I 2 4 0 M M 3 / 3 2 : 2 . 3 0 M M

3_70! 0.10830 2.80MM :-2.80MM ~0 30 ; 40 4t 2 .40MM t 0.10850 37 i'18"0~[~.." 3g 39 j 40 12 4SUM 2.40MM

2.73i 0.1[]820 3 7 - ' 37 i I S O M M 39 ~ 30 40 41 ; b~-10940 36 37 37 2.60MM ; 36 " " -2 -50-1~M- 2_45MM

35 I 0.11000 38 37 : 37 2.60MM t 30 30 2.4SMM ~_80! 0.110~4 ~6 3 7 0 M M I, 3 / 2 ,80MM { 38 30 40

50 51 50 ! 1 75MM

1.80MM ! i 75MM 1 . 8 0 M M , 50 ' ' 4 9 ' ; ~ - . 8 - o ~ " 1 . 9 0 M M ! _40 1 . 0 0 M M I 49 l g 5 M M ; l g O M M , L . 1 . 9 5 M M ; 1 . 9 0 M M 2 . 0 0 M M ; 1.95MM t 2.00MM ' 2 .00MM

46 ' 2.00MM'" 46 i ZOOMM 45 i 2 . 0 0 M M

_27~oMM ~ 46 2 . t O M M ] - 4 - 5 - - 2 . 1 5 M M i :2' I"OMM 2 . 1 5 M M I 2 . 1 0 M M 2 . 2 0 M M ! 2 . 1 5 M M 2 . 2 0 M M ! 44

43 " 2 .20MM 2 . 3 0 M M i 2 .2SMM

2.35MM ' 1 3 0 M M 3/32 I ] O M M

2 . 4 0 M M ' 42 41 3/32

6 9 7

N F P A 5 4 - - A 9 9 R O P

APPEN{ ' ) IX F I~qu~,~/,e~l Onftce S ~ , l ct H~h ~t ihJCl~ "ab le F-4

"rec. D~ , Onllce Din. _L S~ NO. UW

:34 33

32

31

2.90 ; !

3.00)

; ] .10' 1 / o - !

i

i m ,ncl le~,_. Z.___DUO ' 3000 4000 5000 0000 _(_000 ~ 8000 9000 . . . . . . i-DO0(3--

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0,122..05 " 3. 'O0-M-&I-~"32--- -~ 32 - 2 .80 -M-M- | - -~4 O - - -~ 2. . /~MM ) 2 , 7 0 M M - - - 2 ~ ~ M M -

0,12T9(~ "./0 3-1~-OM--~" ~I ~,OOMM ~ 3~. ! 2 . g 0 M M " 33 .... ~ 34 ~. 75MM 1 ; ~ . . . . .3.-~,O'MM- 3 IOMM 31 3 . 0 0 M M ; 3 2 ' 2 . 1 ~ O I M M ~ 3 4 7 ~ 4 "

3 20MM 1/8 ~ " 31 3.OOMM ~ 3'2 ~ 2.gOMM 33 . . . . . . .~--"--' 3 .3(}MM 30 . ~I.~OMM . 1/B i 31.10MM i- 311 , :300MM ? 32

3.20;

30 ( 0.128,50 a.aol o 12o02 3.40: 0.1338~ 33

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i 0 .14050 29- "--3.40MM 3.30MM ~ 3 3 0 M M 30 --I _3_20MM__i 3"~10MM ) 3 . ! 0 M M - .3-3~M--M- 0,14002 ; -2~B ....... : 3 . - E 3 - ~ I 6 M " - M - ~ 3 .3oMM 30 I 3 .20MM I -t/8 I 3.10MM 3 0 0 M M

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. . = ,

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0 . 1 5 ~ D O 23 24 3 80MM 3 7 5 M M . 3 70MM

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| . . . . . . . . . . . . . . . .

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4.7oi~i1~so4 4_751 0.18700

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i 018§oo i o.t~~ ~

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4 70MM 14 4 80MM t 4.~OIMM t 4 .40MM 17 tg 10 4 IOMM 3 / I~ 4 .70MM _1__4.. i 1S " 4,.$OMM 4.40MM 18 4.25MM " 4 .10MM 12 4 7.3MM 14 ! 4 .60MM 4,50MM 4.40MM 11/64 4.2~;MM 4 IOMM ~! . 12 4.70MM r - ~.4. IS 4.SOMM 4.40MM 18 10

6 9 8

N F P A 5 4 - - A 9 9 R O P

APPENDIX F Equivatant Odfice ,.q~ee at High Ardtud~ To~e F-4

FLat, D~ ]orate o4a. $~Ze No M,M ] in Inchew

50O I 0.1~685

2000 3OO0

1~ 12 8 0 .10900 10 11

5.10 0.20079 0 10

, 4 0 0 0 i 5000 6000 i 7000 8000 9000 10000 i

I " " I "

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7 131e4

5

3

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2

1

0.20100 o 0.20312 ! 5.00MM 0 0.20400 I 8 5.00MM

5.20 0.20473 0 5,00MM 0.20550 5 . 1 0 M M 5.0OMM

5.25 0.2O66O t 7 8 5.30 0'20860 + 13/64 I 7

0.20g00 6 1 7 5.40 0.'2i260 5.25MM 5.20MM

021300 5.2SMM 5 5.50 0.21654 4 5.30MM

0.21875 3 4 5.6O 0.22047 3 5.40MM

0.22100 3 3 5.70 0.22441 7/32 5.50MM 5.7'5 0.22630 2 5,50MM

(},Z2~O0 2 7/32

5.00MM 10 '. 11 7 " ' 8 i 0 7 t 8 ! 0 J

i 7 I 8 i s ~oa~J I 5,25MM

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"3/18 ~ 14 14.60MM 4.50MM 4.40MM ! ~t10 I 4 .70MMI 14 4.50MM 4.40MM t 12 4.70MM 14 4.50MM 4.40MM

12 4.75MM 14 4.50MM 4.40MM : 11 1,2 4,70MM 4.60MM 4.50MM

i 12 4.70MM 14 4.50MM 11 12 4.70MM 15

4.90MM 12 4.70MM 4.60MM 0 1'1 ' 3/16 14

10 12 4.70MIVl 0 11 3/16 0 11 3/16 8 10 11 7 5 ,00MM 11 7 5 .00MM 10

1

lO ! 11 3/18 ..4.g0MM 12

10 11 10 1~ 10 11 0 10

5 .00MM 10

5 5.25MM -7 I 5.00MM

4 . 1364 1 8 4 t 5.25MM.T 13/64 ~ 8 3 4 5.25MM i 13,'64 3 i "4 5,30MM t 5.20MM

5,50MM ~ 3 4 ~ 5.25MM , i

699

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