Boiler Inspection Regulations

7/28/2019 Boiler Inspection Regulations

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RULES AND REGULATI ONS

FOR

BOI LER AND PRESSURE VESSEL I NSPECTI ON

( R. I . G. L. - 28- 25)

RI Depart ment of Labor & Trai ni ngDi vi si on of Occupat i onal Saf et yBoi l er I nspect i on Uni t1511 Pont i ac AvenueP. O. Box 20157Cr anst on, RI 02920- 0942Of f i ce#: ( 401) 462- 857 4 Fax#: ( 401) 462- 8576



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TABLE OF CONTENTS

PART I - DEFI NI TI ON OF TERMS . . . . . . . . . . . . . . . . . . . Pg 3

PART I I - ADMI NI STRATI ON: l . Mi ni mum Const r uct i on St andar ds f or Boi l er s & Pr essur e Vessel s . Pg 92. Frequency of I nspect i ons of Boi l er s and Pr essur e Vessel s. . . . Pg 103. Not i f i cat i on of I nspect i on. . . . . . . . . . . . . . . . . . . Pg 114. Exami nat i on For An I nspect or ' s Cer t i f i cat e of Compet ency. . . . Pg 115. Exami nat i on Fees. . . . . . . . . . . . . . . . . . . . . . . . Pg l 26. Cer t i f i cat e of Compet ency and I dent i f i cat i on Car d. . . . . . . Pg l 27. Conf l i ct of I nt er est . . . . . . . . . . . . . . . . . . . . . . Pg l 38. I nspect i on Repor t s To Be Submi t t ed by I nspect or s. . . . . . . . Pg l 39. I nsurance Compani es To Not i f y Chi ef I nspect or of New, Cancel l ed

Or Suspended I nsur ance On Boi l er s Or Pressur e Vessel s . . . . . Pg l 4l 0. Aut hor i zed I nspect or s To Not i f y Chi ef I nspect or Of Unsaf e

Boi l er s Or Pr essur e Ves sel s . . . . . . . . . . . . . . . . . . Pg l 4l l . Owner- Us er I ns pect i on Agency. . . . . . . . . . . . . . . . . . Pg l 5l 2. Def ect i ve Condi t i ons Di scl osed At Ti me of Exter nal I nspect i on . Pg l 6l 3. Owner Or User To Not i f y Chi ef I nspect or Of Acci dent . . . . . . Pg l 6

l 4. I nspect i on Cer t i f i cat e And I nspect i on Fees . . . . . . . . . . . Pg l 6l 5. Val i di t y Of I nspect i on Cer t i f i cat e. . . . . . . . . . . . . . . Pg 19l 6. Re- st ampi ng Boi l er s and Pr essur e Vessel s . . . . . . . . . . . Pg 19l 7. Penal t y For Oper at i on Of Unsaf e Boi l er s Or Pr essur e Vessel s . . Pg 20l 8. Condemned Boi l er s And Pr essur e Boi l er s. . . . . . . . . . . . . Pg 20l 9. Rei ns ta l l at i on Of Boi l ers Or Pressure Vessel s . . . . . . . . . Pg 2020. I nst al l at i on, Oper at i on, Sal e Or Of f er i ng For Sal e Of Non-

St andard Boi l ers Or Pressure Vessel s . . . . . . . . . . . . . . Pg 2021. I nst al l at i on Of Used Or Second- Hand Boi l er s Or Pressur e Vessel s Pg 2022. Rei ns ta l l ed Boi l er s Or Pressure Vessel s . . . . . . . . . . . . Pg 2123. Worki ng Pressure For Exi s t i ng I ns ta l l at i ons . . . . . . . . . . Pg 2124. Repai r s and Al t er ati ons To Boi l er s & Pr essur e Vessel s . . . . . Pg 2125. Repai r s To Pressure Rel i ef Val ves . . . . . . . . . . . . . . . Pg 2126. Ri vet ed Pat ches . . . . . . . . . . . . . . . . . . . . . . . . Pg 2227. Requi rement s For New I ns ta l l at i ons . . . . . . . . . . . . . . Pg 2228. Appl i cat i on Of St at e Ser i al Numbers . . . . . . . . . . . . . . Pg 2329. Var i at i ons. . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 2330. Penal t i es . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 24

PART I I I - EXI STI NG I NSTALLATI ON: SECTI ON I - POWER BOI LERS EBO- l - Age Li mi t Of Exi s t i ng Boi l er s . . . . . . . . . . . . . . . Pg 24EBO- 2 - Maxi mum Al l owabl e Worki ng Pr essur e For St andard Boi l ers . . Pg 25EBO- 3 - Maxi mum Al l owabl e Worki ng Pr essur e For Nonst andar d Boi l er s. Pg 25EBO- 4 - Cast I r on Header s And Mud Dr ums . . . . . . . . . . . . . . Pg 26EBO- 5 - Pressure On Cast I r on Boi l er s . . . . . . . . . . . . . . . Pg 26EBO- 6 - Saf et y Val ves . . . . . . . . . . . . . . . . . . . . . . . Pg 26EBO- 7 - Boi l er Feedi ng . . . . . . . . . . . . . . . . . . . . . . Pg 28

EBO- 8 - Wat er L evel I ndi cat or s . . . . . . . . . . . . . . . . . . . Pg 29EBO- 9 - Wat er Col umns . . . . . . . . . . . . . . . . . . . . . . . Pg 30EBO- l 0- Gage Gl ass Connect i ons . . . . . . . . . . . . . . . . . . . Pg 31EBO- l l - Pr essur e Gages. . . . . . . . . . . . . . . . . . . . . . . Pg 32EBO- l 2- St op Val ves . . . . . . . . . . . . . . . . . . . . . . . . Pg 33EBO- l 3- Bl ow- of f Pi pi ng. . . . . . . . . . . . . . . . . . . . . . Pg 33EBO- l 4- Repai r s And Renewal s Of Boi l er Fi t t i ngs And Appl i ances. . . Pg 34EBO- l 5- Condi t i ons Not Covered By These Requi r ement s. . . . . . . . Pg 34



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TABLE OF CONTENTS

PART I I I - EXI STI NG I NSTALLATI ON: SECTI ON I I - HEATI NG BOI LERS EHB- l - St andar d Boi l er s . . . . . . . . . . . . . . . . . . . . . Pg 35EHB- 2 - Nonstandard Ri vet ed Boi l ers . . . . . . . . . . . . . . . . Pg 35EHB- 3 - Nonstandard Wel ded Boi l ers . . . . . . . . . . . . . . . . Pg 35EHB- 4 - Nonstandard Cast I r on Boi l er s . . . . . . . . . . . . . . Pg 35EHB- 5 - Por t abl e Wat er Heat er s . . . . . . . . . . . . . . . . . . Pg 35EHB- 6 - Saf et y Val ves. . . . . . . . . . . . . . . . . . . . . . . Pg 35EHB- 6 – Tabl e . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 36EHB- 7 - Saf et y Rel i ef Val ve Requi r ement s For Hot Wat er Heat i ng And

Hot Wat er Suppl y Boi l er s . . . . . . . . . . . . . . . . . Pg 37EHB- 8 - St eam Gages. . . . . . . . . . . . . . . . . . . . . . . . Pg 38EHB- 9 - Pressur e Or Al t i t ude Gages And Ther momet er s. . . . . . . . Pg 39EHB- l 0- Wat er Gage Gl asses . . . . . . . . . . . . . . . . . . . . Pg 39EHB- l l - St op Val ves. . . . . . . . . . . . . . . . . . . . . . . . Pg 40EHB- l 2- Feed- wat er Connect i ons . . . . . . . . . . . . . . . . . . Pg 41

EHB- l 3- Wat er Col umn And Wat er Level Cont r ol Pi pes . . . . . . . . Pg 42EHB- l 4- Ret ur n Pump. . . . . . . . . . . . . . . . . . . . . . . . Pg 42EHB- l 5- Repai r s And Renewal s Of Fi t t i ngs And Appl i ances. . . . . . Pg 42

PART I I I - EXI STI NG I NSTALLATI ON: SECTI ON I I I - PRESSURE VESSELS EPV- l - Maxi mum Al l owabl e Worki ng Pr essur e For St andard Pr essur e

Vessel s. . . . . . . . . . . . . . . . . . . . . . . . . . Pg 42EPV- 2 - Maxi mum Al l owabl e Wor ki ng Pr essur e For Nonst andar d Pr essur e

Vessel s, Except as Pr ovi ded i n EPV- 3 . . . . . . . . . . . Pg 42EPV- 3 - Nonst andar d Pr essur e Vessel s - Use Of Ot her For mul as . . . Pg 44EPV- 4 - I nspect i on of I naccessi bl e Par t s . . . . . . . . . . . . . Pg 44EPV- 5 - Over pr es sur e Pr ot ect i on. . . . . . . . . . . . . . . . . . Pg 44EPV- 6 - Repai r s And Renewal s Of Fi t t i ngs And Appl i ances. . . . . . Pg 44

PART I V - GENERAL REQUI REMENTS :GR- l - I nspecti on Of Boi l er s And Pr essur e Vessel s . . . . . . . . Pg 45GR- 2 - Preparat i on For I nspect i on . . . . . . . . . . . . . . . . Pg 45GR- 3 - Boi l ers And Pr essur e Vessel s I mpr operl y Prepared For

I nspect i on . . . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 4 - Removal Of Cover i ng t o Per mi t I nspect i on . . . . . . . . . Pg 46GR- 5 - L ap Seam Cr ack . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 6 - Pr essur e Test . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 7 - Aut omat i c Low Wat er Fuel Cut of f And/ Or Wat er Feedi ng Devi ce Pg 47GR- 8 - Pressure Reduc i ng Val ves . . . . . . . . . . . . . . . . . Pg 47GR- 9 - Boi l er Bl ow- of f Equi pment . . . . . . . . . . . . . . . . Pg 48GR- l 0 - Locat i on Of Di schar ge Pi pi ng Out l et s . . . . . . . . . . . Pg 48GR- l l - Suppor t s . . . . . . . . . . . . . . . . . . . . . . . . . Pg 48

GR- l 2 - Boi l er Door Lat c hes . . . . . . . . . . . . . . . . . . . Pg 48GR- l 3 - Cl ear ance. . . . . . . . . . . . . . . . . . . . . . . . . Pg 49GR- l 4 - Ladders and Runways . . . . . . . . . . . . . . . . . . . Pg 49GR- l 5 - Exi t Fr om Boi l er Room. . . . . . . . . . . . . . . . . . . Pg 49GR- l 6 - Sugges t i ons For Operat i ons . . . . . . . . . . . . . . . . Pg 49GR- l 7 - Ai r And Vent i l at i on Requi r ement s - Combust i on Ai r Suppl y &

Vent i l at i on Of Boi l er Room . . . . . . . . . . . . . . . . Pg 49GR- l 8 - Gas Bur ner s. . . . . . . . . . . . . . . . . . . . . . . . Pg 50GR- l 9 - Condi t i ons Not Covered By These Rul es And Regul at i ons. . . Pg 50



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FOREWORD

To pr ot ect t he publ i c agai nst boi l er and pr essur e vesselexpl osi ons, i t i s essent i al t hat compr ehensi ve admi ni st r at i ver ul es and r egul at i ons ar e approved by t he Code Commi ss i on f orOccupat i onal Saf et y & Heal t h under t he aut hor i t y of Chapt er28- 25 of t he General Laws of Rhode I sl and.

These r ecommended Admi ni st r at i ve Boi l er and Pr essur eVessel Saf et y Rul es and Regul at i ons ar e i nt ended t o serve t hatpur pose.

On J anuar y 5, 1989, t he Code Commi ss i on appr oved t he Rul esand Regul at i ons r ecommended by t he Advi sor y Panel . These Rul esshal l t ake ef f ect on Febr uary 1, 1989.

I NTRODUCTI ON

To pr omot e uni f or m enf or cement of boi l er and pr essur evessel l aws, t hese r ul es and r egul at i ons ar e pr epar ed t oassi st t he Admi ni st r at or , t he Chi ef I nspect or and I nspect or si n t he i mpl ement at i on, admi ni st r at i on and i nt er pr et at i on of t he boi l er and pr essur e vessel s saf et y act f or t he St at e of Rhode I sl and.

The pur pose of t he act i s t o pr omot e saf et y i n t heappl i cat i ons of boi l er s or pr essur e vessel s by pr ovi di ngsui t abl e r equi r ement s f or const r ucti on, i nst al l at i on,i nspect i on, mai nt enance, r epai r , al t er at i on, oper at i on,modi f i cat i on and r epl acement . I t i s t he i nt ent t o pr ovi de suchsaf et y wi t h t he l east possi bl e bur den upon t he i ndust r i esi nvol ved. I t i s not pr esumed t o l i mi t i n any way t hedesi gner ' s or t he manuf act ur er' s r i ght t o choose any desi gn ormet hod of const r uct i on t hat conf orms t o t he r equi r ement s of t heAmeri can Soci et y of Mechani cal Engi neer s ( ASME) Boi l er andPressure Vessel Code. I n some i nst ances, due t o a val i di mpedi ment t o f ul l ASME Code compl i ance, a boi l er or pressur evessel cannot be const r uct ed t o t hat Code. Provi si on i s madef or t he owner or user t o appl y t o t he Chi ef I nspect or f orper mi ssi on t o use such boi l er or pr essur e vessel wi t hi n t he

j ur i sdi ct i on.

When a boi l er and pr essur e vessel i nspect i on l aw i senact ed i n a j ur i sdi ct i on, t he enf orcement aut hori t y may be

conf r ont ed wi t h t he pr obl em of so admi ni st er i ng t he l aw and t her ul es and r egul ati ons t hat t hey wi l l not cr eate undue har dshi p,par t i cul ar l y i n l ocal i t i es wher e numer ous smal l i nst al l at i onsare encount er ed. I t i s t he pur pose of any boi l er and pr essurevessel i nspect i on l aw and t he r ul es and r egul at i ons based



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t her eon t o pr ovi de f or and mai nt ai n saf e operat i ng condi t i ons,but i s def i ni t el y not t he i nt ent t hat t hey shoul d pr event t heoperat i on of any equi pment t hat can be shown t o be r easonabl ysaf e. Wi t h t hese consi der at i ons i n vi ew, t he f ol l owi ng r ul esf or exi st i ng i nst al l at i ons ar e pr esent ed t o f or m t he basi sof an ef f i ci ent , uni f or m and wor kabl e saf et y di vi si on.

Provi si on i s al so made f or any per son who bel i eves anyr ul e or r egul at i on pr omul gat ed by t he Code Commi ssi on i sunr easonabl e, or t hat i t i mposes an undue bur den upon t heowner or user , t o appl y t o t he Admi ni st r at or f or a var i ati onf r om such r ul e or r egul at i on.



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PART I

DEFI NI TI ON OF TERMS

l . ACT - The Boi l er and Pressur e Vessel Saf et y Act whi ch wasenact ed as Chapt er 28- 25, Act s of t he General Assembl y.

2. ADMI NI STRATOR - The Admi ni st r at or of t he Di vi si on of Occupat i onal Saf et y i s appoi nt ed by t he Di r ect or of Labor

and i s r esponsi bl e f or i mpl ement at i on and enf orcement of al lpr ovi si ons under Chapt er 28- 20.

3. ALTERATI ON - A change i n any i t em descr i bed on t he ori gi nalManuf act ur er ' s Dat a Report whi ch af f ect s t he pr essurecapabi l i t y of the boi l er or pr essur e vessel . Non- physi calchanges such as an i ncr ease i n t he maxi mum al l owabl e wor ki ng

pr essur e ( i nt er nal or exter nal ) or desi gn t emper at ur e of aboi l er or pressur e vessel shal l be consi der ed an al t er at i on.A reduct i on i n mi ni mum t emperat ur e such t hat addi t i onalmechani cal t est s are r equi r ed shal l al so be consi der ed anal t era t i on.

4. API - ASME CODE - The Amer i can Pet r ol eum I nst i t ut e ( API ) i nconj unct i on wi t h t he ASME Code as used i n t hese r ul es andr egul at i ons shal l mean t he Code f or unf i r ed pr essur e vessel sf or pet r ol eum l i qui ds and gases.

5. APPROVED - Appr oved by t he Code Commi ss i on f or Occupat i onalSaf et y and Heal t h.

6. ASME - The Amer i can Soci et y of Mechani cal Engi neer s ( ASME) ,345 E. 47t h St r eet , New Yor k, New Yor k l 00l 7.

7. AUTHORI ZED I NSPECTI ON AGENCY - One of t he f ol l owi ng:

( a) a depar t ment or di vi si on est abl i shed by a j ur i sdi ct i on whi ch has adopt ed and does admi ni st erone or mor e sect i ons of t he ASME Code, one of whi chshal l be Sect i on I as a l egal r equi r ement , and whosei nspect ors hol d val i d commi ssi ons i ssued by TheNat i onal Boar d of Boi l er and Pressur e VesselI nspect or s;

( b) an i nsur ance company whi ch has been l i censed orr egi st er ed by the appr opr i at e aut hori t y of a St at e of t he Uni t ed St at es or a Provi nce of Canada t o wr i t eand does wr i t e boi l er and pr essur e vessel i nsur anceand t o pr ovi de i nspect i on ser vi ce of boi l er s andpr essure vessel s i n such St at e or Pr ovi nce.



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8. BOI LER - A cl osed vessel i n whi ch wat er or ot her l i qui d i sheated, st eam or vapor i s gener at ed, st eam or vapor i ssuperheat ed, or any combi nat i on t hereof , under pr essur e orvacuum, f or use external t o i t sel f , by t he di r ectappl i cat i on of ener gy f r om combust i on of f uel s, el ectr i ci t yor sol ar ener gy. The t er m boi l er i ncl udes f i r ed uni t s f orheat i ng or vapori zi ng l i qui ds ot her t han wat er where t heseuni t s ar e separat e f r om pr ocessi ng syst ems and compl et ewi t hi n t hemsel ves. The t er m boi l er al so shal l i ncl ude t heappar at us used by whi ch heat i s generat ed and al l cont r ol sand saf et y devi ces associ at ed wi t h such apparat us or t hecl osed vessel s.

( a) Power Boi l er - A boi l er i n whi ch st eam or othervapor i s generat ed at a pr essur e of more t han l 5psi .

( b) Hi gh Pr essur e, Hi gh- Temper ature Boi l er - A boi l eri n whi ch wat er , oi l , or ot her f l ui d i s heat ed andi nt ended f or oper at i on at pr essur es i n excess of l 60psi and/ or t em perat ur es i n excess of 250 degr ees

Fahr enhei t .( c) Heat i ng Boi l er - A st eam or vapor boi l er oper at i ng

at a pr essure not exceedi ng l 5 psi st eam pr essure ora hot wat er boi l er i n whi ch wat er or other f l ui d i sheat ed and i nt ended f or operat i on at pressur es notexceedi ng l 60 psi or t emperat ur es not exceedi ng 250degr ees Fahr enhei t .

( d) El ec t r i c Boi l er - A power boi l er or heat i ng boi l eri n whi ch t he sour ce of heat i s el ect r i ci t y.

( e) Mi ni at ur e Boi l er - A power boi l er orhi gh- t emperat ur e wat er boi l er whi ch does not exceedt he f ol l owi ng l i mi t s :

1. 16" i nsi de di amet er of shel l ;

2. 20 sq. f t . heat i ng sur f ace ( not appl i cabl e t oel ect r i c boi l er s ) ;

3. 5 cu. f t . gr oss vol ume excl usi ve of casi ng andi nsul at i on.

4. l 00 psi maxi mum al l owabl e worki ng pr essur e.



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( f ) Unf i r ed Power Boi l er - An unf i r ed st eam or ot hervapor gener ati ng syst em usi ng heat f r om t heoper ati on of a pr ocessi ng syst em or ot her i ndi r ectheat sour ce.

( g) Hot Wat er Suppl y Boi l er - A boi l er compl et el y f i l l edwi t h wat er used f or st orage and/ or suppl y of hotwat er t o be used exter nal l y t o i t sel f at pr essur esnot exceedi ng l 60 psi or at t emperat ures notexceedi ng 250 degrees Fahr enhei t at or near t heboi l er out l et .

( h) Por t abl e Boi l er - A boi l er whi ch i s pr i mar i l yi nt ended f or t emporar y l ocat i on and t he const r uct i onand usage permi t s i t t o be r eadi l y moved f r om onel ocat i on to anot her .

9. CERTI FI CATE OF COMPETENCY - A cer t i f i cat e i ssued t o a per sonwho has passed t he exami nat i on prescr i bed by t heAdmi ni st r at or - See 28- 25- 4.

10. CERTI FI CATE OF I NSPECTI ON - A cer t i f i cat e i ssued by t heAdmi ni st r at or f or t he oper at i on of a boi l er , pr essur evessel or nucl ear system as r equi r ed by t he Act .

11. CERTI FI CATE I NSPECTI ON - An i nspect i on , t he r epor t of whi ch i s used by t he Admi ni st r at or as j ust i f i cat i on f ori ssui ng, wi t hhol di ng or r evoki ng t he i nspect i oncer t i f i cat e. Thi s cer t i f i cat e i nspect i on shal l be ani nt er nal i nspect i on when r equi r ed; ot her wi se, i t shal l beas compl et e an i nspect i on as possi bl e.

. ( a) I NTERNAL I NSPECTI ON - As compl et e an exami nat i on ascan r easonabl y be made of t he i nt ernal and ext er nalsur f aces of a boi l er or pressur e vessel whi l e i t i sshut down and manhol e pl at es, handhol e pl at es orot her i nspect i on openi ng cl osur es ar e r emoved asr equi r ed by t he i nspect or.

( b) EXTERNAL I NSPECTI ON - An i nspect i on made when aboi l er or pr essur e vessel i s i n oper at i on, i f possi bl e.

12. CHI EF I NSPECTOR - The Chi ef Boi l er and Pressure VesselI nspect or i n t he Di vi si on of Occupat i onal Saf et y i sappoi nt ed by t he Di r ect or of Labor and i s charged t oadmi ni st er and i mpl ement t he pr ovi si ons of t hi s Chapt er .

The Chi ef I nspect or i s r esponsi bl e t o t he Admi ni st r at or of Occupat i onal Saf et y as out l i ned i n t he Rhode I sl and Gener al

Laws, Sect i on 28- 25- 3.



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13. COMMI SSI ON- NATI ONAL BOARD - The commi ss i on i ssued by TheNat i onal Boar d of Boi l er and Pr essur e Vessel I nspect or s t o ahol der of a cert i f i cat e of compet ency who desi r es t o makeshop i nspect i ons or f i el d i nspect i ons i n accor dance wi t h t heNat i onal Boar d Byl aws and whose empl oyer s ubmi t s t hei nspect or ' s appl i cat i on t o t he Nat i onal Boar d f or suchcommi ss i on.

14. CODE COMMI SSI ON - St at e of Rhode I sl and Code Commi ssi on onOccupat i onal Saf et y and Heal t h.

15. CONDEMNED BOI LER, PRESSURE VESSEL - A boi l er or pr essur evessel t hat has been i nspect ed and decl ared unsaf e, ordi squal i f i ed by l egal r equi r ement s, by an i nspect or and ast ampi ng or mar ki ng desi gnat i ng i t s condemnat i on has beenappl i ed by t he Chi ef or Aut hor i zed I nspect or .

16. DI RECTOR - The Di r ect or of Labor or hi s dul y aut hori zedr epr esent at i ve.

17. DI VI SI ON - Di vi si on of Occupat i onal Saf et y wi t hi n t he St at eDepar t ment of Labor .

18. EXI STI NG I NSTALLA TI ON - I ncl udes any boi l er or pr essur evessel const r uct ed, i nst al l ed, pl aced i n oper at i on, orcont r act ed f or bef or e J ul y 1, 1985.

19. I NSPECTOR - The Chi ef I nspect or, or any Aut hori zedI nspect or, or Owner - User I nspect or.

( a) CHI EF I NSPECTOR - The Chi ef Boi l er and Pressur eVessel I nspect or appoi nt ed under t he Act .

( b) AUTHORI ZED I NSPECTOR - An I nspect or empl oyed by t heSt at e of Rhode I sl and or an Aut hori zed I nsur anceCompany hol di ng a Rhode I sl and Cer t i f i cat e of Compet ency, and who i s r egul ar l y empl oyed by t heSt at e or an I nsur ance Company aut hor i zed t o i nsur eagai nst l oss f r om expl osi on of boi l er s or pr essur evessel s i n t hi s St at e.

( c) OWNER- USER I NSPECTOR - An I nspect or who hol ds aval i d Nat i onal Boar d Owner - User Commi ss i on who haspassed t he exami nat i on pr escr i bed by t heAdmi ni st r at or and who i s cont i nuousl y empl oyed asan i nspect or by an owner - user i nspect i on agency.



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20. J URI SDI CTI ON - A St at e, commonweal t h, count y ormuni ci pal i t y of t he Uni t ed St at es or a Provi nce of Canadawhi ch has adopt ed one or mor e sect i ons of t he ASME Code,one of whi ch i s Sect i on I , and mai nt ai ns a dul y const i t ut eddepart ment , bur eau or di vi si on f or t he pur pose of enf or cement of such Code.

21. LI NED POTABLE WATER HEATER - A wat er heat er wi t h acor r osi on r esi st ant l i ni ng used t o suppl y pot abl e hot water .

22. NATI ONAL BOARD - The Nat i onal Boar d of Boi l er and Pressur eVessel I nspect or s, ( NB) l 055 Cr upper Avenue, Col umbus,Ohi o 43229, whose membershi p i s composed of t he Chi ef I nspect ors of j ur i sdi ct i ons who ar e char ged wi t h t heenf or cement of t he provi si ons of t he ASME Code.

23. NATI ONAL BOARD I NSPECTI ON CODE - The manual f or boi l er andpr essur e vessel i nspect ors publ i shed by t he Nat i onal Boar df r om whi ch copi es may be obt ai ned.

24. NEW BOI LER 0R PRESSURE VESSEL I NSTALLATI ON - I ncl udes al l

boi l er s and pr essur e vessel s const r uct ed, i nst al l ed,pl aced i n oper at i on or cont r act ed f or af t er J ul y, l 986.

25. NONSTANDARD BOI LER OR PRESSURE VESSEL - A boi l er orpressur e vessel t hat does not bear t he ASME st amp, t heAPI - ASME st amp, or t he st amp of any j ur i sdi ct i on whi ch hasadopt ed a st andard of const r uct i on equi val ent t o t hatr equi r ed by t he Depar t ment .

26. OWNER OR USER - Any per son, f i r m or cor por at i on l egal l yr esponsi bl e f or the saf e i nst al l at i on, oper at i on andmai nt enance of any boi l er or pr essure vessel wi t hi n t he

j ur i sdi ct i on.

27. OWNER- USER I NSPECTI ON AGENCY - An owner or user of pr essur evessel s who mai nt ai ns a r egul arl y est abl i shed i nspect i ondepar t ment , whose or gani zat i on and i nspect i on procedur esmeet t he r equi r ement s of t he Nat i onal Boar d r ul es and areaccept abl e t o t he Di vi si on.

28. PRESSURE VESSEL - A vessel i n whi ch t he pr essur e i sobt ai ned f r om an exter nal sour ce, or by t he appl i cat i on of heat f r om an i ndi r ect sour ce, or f r om a di r ect sour ce ot hert han t hose boi l er s def i ned i n i t em 8 of Par t I .

29. PSI - Pounds per squar e i nch gauge.

30. REI NSTALLED BOI LER OR PRESSURE VESSEL - A boi l er orpr essur e vessel r emoved f r om i t s or i gi nal set t i ng andr ei nst al l ed at t he same l ocat i on or at a new l ocat i onwi t hout change or owner shi p.

31. RELI EF VALVE - A pr essur e r el i ef val ve act uat ed by i nl etst at i c pr essur e havi ng a gr adual l i f t gener al l y pr opor t i onal



8

t o t he i ncr ease i n pr essure over openi ng pr essure. I t maybe pr ovi ded wi t h an encl osed spri ng housi ng sui t abl e f orcl osed di schar ge syst em appl i cat i on and i s pr i mar i l y usedf or l i qui d servi ce.

32. REPAI R - BOI LER OR PRESSURE VESSEL - The wor k necessary t or est or e a boi l er or pr essur e vessel t o a saf e andsat i sf act or y condi t i on, pr ovi ded t her e i s no devi at i on f r omt he or i gi nal desi gn.

33. REPAI R - PRESSURE RELI EF VALVE - The r epl acement ,r e- machi ni ng or cl eani ng of any cri t i cal par t , l appi ng of seat and di sk or any ot her operat i on whi ch may af f ect t hef l ow passage, capaci t y f unct i on or pr essur e r et ai ni ngabi l i t y of t he val ve. Di sassembl y, r eassembl y and/ oradj ust ment s whi ch af f ect t he pr essur e r el i ef val ve f unct i onar e al so consi der ed a repai r .

34. SAFETY RELI EF VALV E - A pr essur e r el i ef val ve char act er i zedby r api d openi ng or pop act i on, or by openi ng i n pr oport i on

t o t he i ncr ease i n pr essure over openi ng pr essure,dependi ng on appl i cat i on.

35. SAFETY VALVE - A pr essur e r el i ef val ve act uat ed by i nl etst at i c pr essure and charact er i zed by r api d openi ng or popact i on.

36. SECOND- HAND BOI LER OR PRESSURE VESSEL - A boi l er orpr essur e vessel whi ch has changed bot h l ocat i on andowner shi p si nce pr i mary use.

37. STANDARD BOI LER OR PRESSURE VESSEL - A boi l er or pr essur evessel whi ch bear s t he st amp of t hi s St at e, t he ASME st amp,t he API - ASME st amp, bot h t he ASME and Nat i onal Boar d st amp,or t he st amp of anot her j ur i sdi ct i on whi ch has adopt ed ast andar d of const r uct i on equi val ent t o t hat r equi r ed by t heBoar d.

38. WATER HEATER - A cl osed vessel used excl usi vel y t o suppl ypot abl e wat er whi ch i s heat ed by t he combust i on of f uel s,el ect r i ci t y or any ot her sour ce and wi t hdr awn f or useext er nal t o t he syst em at pr essures not exceedi ng l 60 psiand shal l i ncl ude al l cont r ol s and devi ces necessar y t opr event wat er t emperat ur es f r om exceedi ng 2l 0 degr eesFahrenhei t as wel l as st or age vessel connect ed t o t he wat erheat er .



9

PART I I

ADMI NI STRATI ON

1. MI NI MUM CONSTRUCTI ON STANDARDS FOR BOI LERS AND PRESSUREVESSELS:

( a) Al l boi l er s, pr essur e vessel s, wat er heat er s, andst orage t anks, unl ess ot her wi se exempt , shal l ber egi st er ed on an annual basi s. Al l new boi l er s,pr essure vessel s, wat er heat er s, and st orage t anksunl ess ot herwi se exempt , t o be oper at ed i n t hi s

j ur i sdi ct i on, shal l be desi gned, const r uct ed,i nspect ed, st amped and i nst al l ed i n accordancewi t h t he ASME Code and t he l at est addendai ncl udi ng code cases i n ef f ect , and t hese r ul es andr egul at i ons. Boi l er s and pr essur e vessel s f or whi ch anASME Manuf act ur ers ' Dat a Repor t i s r equi r ed shal l beart he manuf act ur er ' s " NB" number as r egi st ered wi t h t he

Nat i onal Boar d. A copy of t he Manuf act ur er s' Dat aReport , si gned by t he manuf act ur er' s r epr esent at i veand t he Nat i onal Boar d commi ssi oned i nspect or shal l bef i l ed wi t h t he Chi ef I nspect or t hr ough t he Nat i onalBoar d.

( b) St at e Speci al - I f , due t o a val i d i mpedi ment t o f ul lASME Code compl i ance, a boi l er or pressur e vesselcannot bear t he ASME and Nat i onal Boar d s t ampi ng,det ai l s i n t he Engl i sh l anguage and Uni t ed St at escust omary uni t s of t he pr oposed const r uct i on mat eri alspeci f i cat i ons and cal cul at i ons appr oved by aRegi st er ed Prof essi onal Engi neer exper i enced i n boi l erand pr essur e vessel desi gn shal l be submi t t ed t o t heAdmi ni st r at or by t he owner or user f or appr oval as" St at e Speci al " whi ch must be obt ai ned f r om t heAdmi ni st r at or bef or e const r uct i on i s st ar t ed.

( c) Bef or e a second- hand boi l er or pr essur e vessel , i si ns ta l l ed, appl i cat i on f or permi ss i on t o i ns ta l l i tshal l be f i l ed by t he owner or user wi t h t he Chi ef I nspect or and hi s appr oval obt ai ned.

( d) The f ol l owi ng s hal l be exempt f r om t he ASME Codeconst r uct i on r equi r ement s of ( a) .

( l ) Wat er heat er s and wat er st or age t anks wher e none of

t he f ol l owi ng l i mi t at i ons ar e exceeded:( i ) Heat i nput of 200, 000 BTU/ Hr ;

( i i ) Wat er t emper at ur e of 2l 0 degr ees Fahr enhei t ;

( i i i ) Nomi nal wat er capaci t y of l 20 gal l ons;except t hat t hey shal l be pr ovi ded wi t h one or more

saf et y r el i ef val ves meet i ng t he r equi r ement s of



10

EHB- 6, Par t I I I .

( 2) Cont i nuous coi l t ype hot wat er boi l er s used onl yf or "st eam vapor " cl eani ng of such t hi ngs asmachi ner y, equi pment and bui l di ng when none of t hef ol l owi ng l i mi t at i ons ar e exceeded:

( i ) 3/ 4 " di amet er t ubi ng or pi pe si ze wi t h nodrums or header s at t ached;

( i i ) Nomi nal wat er cont ai ni ng capaci t y does notexceed si x ( 6) gal l ons;

( i i i ) Wat er t emperat ur e does not exceed 350 degr eesFahr enhei t .

( i v) St eam i s not gener at ed wi t hi n the coi l ,except t hat t hey shal l be pr ovi ded wi t h one

or more saf et y r el i ef val ves meet i ng t her equi r ement s of EBO- 6, Par t I I I .

( e) I n any ci r cumst ances ot her t han t he above, t he owneror user shal l cont act t he Chi ef I nspect or .

2. FREQUENCY OF I NSPECTI ONS OF BOI LERS AND PRESSURE VESSELS( a) Power boi l er s and hi ghpr essure, hi gh t emper at ur e wat er

boi l er s shal l r ecei ve an i nspect i on annual l y whi chshal l be an i nt er nal i nspect i on wher e const r uct i onper mi t s; ot her wi se, i t shal l be as compl et e ani nspect i on as possi bl e. Such boi l er s shal l al so bei nspect ed ext er nal l y annual l y whi l e under normaloper at i ng condi t i ons.

( b) Low pr essur e boi l er s, hot wat er heat er s, and hot wat erst or age tanks shal l r ecei ve an i nspect i on bi enni al l y.

( l ) St eam or vapor boi l er s shal l have an ext er nali nspect i on and an i nt er nal i nspect i onbi enni al l y wher e const r uct i on per mi t s.

( 2) Hot wat er heat i ng and hot wat er suppl y boi l er sshal l have an ext er nal i nspect i on bi enni al l yand wher e const r uct i on per mi t s, an i nt ernali nspect i on at t he di screti on of t he i nspect or .

( 3) Wat er Heat er s i ncl udi ng hot wat er st orage t anksshal l have an ext er nal i nspect i on bi enni al l yand shal l i ncl ude t he f uncti on of al l cont r ol sand devi ces.

( c) Except as pr ovi ded f or i n ( d) and ( e) bel ow, unf i r edpr essur e vessel s shal l r ecei ve an i nspect i ont r i enni al l y. Thi s i nspecti on shal l be i nt er nal wher econst r uct i on per mi t s. Pr essur e vessel s not subj ect t oi nt er nal cor r osi on shal l be i nspect ed ext er nal l y.



11

( d) Pressur e vessel s t hat are under t he super vi si on of anowner - user i nspect i on agency shal l be i nspect ed at t hesame i nt erval unl ess ot herwi se agr eed upon by t he Chi ef I nspect or wi t h t hat Agency.

( e) Based upon document at i on of s af e ser vi ce condi t i ons byt he owner or user of t he operat i ng equi pment and af t eran exter nal i nspect i on by t he Chi ef I nspect or , sai dChi ef I nspect or may, i n hi s di screti on, per mi tvar i at i ons i n t he i nspect i on f r equency r equi r ement s aspr ovi ded i n t hese Rul es and Regul at i ons.

3. NOTI FI CATI ON OF I NSPECTI ONCer t i f i cat e i nspect i on, as r equi r ed i n Sect i on 2 above,shal l be car r i ed out pr i or t o t he expi r at i on dat e of t hecer t i f i cat e at a t i me mut ual l y agr eeabl e t o t he i nspect or

and owner or user .Ext ernal i nspect i ons may be perf or med by t he i nspect ordur i ng r easonabl e hour s and wi t hout pr i or not i f i cat i on i naccor dance wi t h 28- 25- 7.

When as a r esul t of ext er nal i nspect i on or det er mi nat i on byot her obj ect i ve means i t i s t he i nspect or ' s opi ni on t hatcont i nued oper at i on of t he boi l er or pr essur e vesselconst i t ut es a menace t o publ i c saf et y, t he i nspect or mayr equest an i nt er nal i nspect i on or an appr opr i at e pr essur et est or bot h t o eval uat e condi t i ons. I n such i nst ances t heowner or user shal l pr epare t he boi l er or pr essure vesself or such i nspect i ons or t est s as t he i nspect or desi gnat esi n accor dance wi t h 28- 25- 7.

4. EXAMI NATI ON FOR AN I NSPECTOR' S CERTI FI CATE OF COMPETENCYExami nati on f or an i nspect or ' s cer t i f i cat e of compet encymay be hel d at t he of f i ce of t he Di vi si on or at any ot herl ocat i on t o be sel ect ed by t he Admi ni st r ator . An appl i cantf or an exami nat i on shal l have educat i on and experi enceequal t o at l east one of t he f ol l owi ng:

( a) a degr ee i n mechani cal engi neer i ng pl us one year of exper i ence i n desi gn, const r uct i on, oper at i on ori nspect i on of hi ghpr essur e boi l er s and pr essur evessel s;

( b) a degr ee i n a br anch of engi neer i ng, ot her t hanmechani cal engi neer i ng or an associ at e degr ee i nmechani cal t echnol ogy pl us t wo year s of exper i ence i ndesi gn, const r uct i on, oper at i on or i nspect i on of hi gh pr essure boi l er s and pr essure vessel s;

( c) t he equi val ent of a hi gh school educat i on pl us t hr eeyears of exper i ence:( l ) i n hi gh pr essur e boi l er and pr essur e vessel

const r ucti on or repai r ; or



12

( 2) as an oper at i ng engi neer i n char ge of hi ghpr essur e boi l er oper at i on; or

( 3) as an i nspect or of hi ghpr essur e boi l er s andpr essur e vessel s.

Appl i cat i ons f or exami nat i on shal l be i n wr i t i ng on a f or mt o be f ur ni shed by t he Admi ni st r at or st ati ng the educat i onof t he appl i cant , a l i st of hi s empl oyer s, hi s per i od of empl oyment and posi t i on hel d wi t h each empl oyer .Appl i cat i ons cont ai ni ng wi l l f ul f al s i f i cat i ons orunt r ut hf ul st at ement s shal l be cause f or r ej ect i on.Appl i cat i ons shal l be submi t t ed t o t he Chi ef I nspect or atl east 45 days pr i or t o t he dat e of exami nat i on.

I f t he appl i cant ' s educat i on and exper i ence ar e accept abl et o t he Admi ni st r at or , he shal l be gi ven a wr i t t en

exami nat i on deal i ng wi t h t he desi gn, const r uct i on,mai nt enance and r epai r of boi l ers and pr essur e vessel s andt hei r appur t enances, and t he appl i cant shal l be accept edor r ej ect ed on t he mer i t s of t hi s exami nat i on. I f t heappl i cant i s successf ul i n meet i ng the r equi r ement s of t heDi vi si on, a cer t i f i cat e of compet ency wi l l be i ssued byt he Admi ni st r at or , when t he appl i cant i s empl oyed by anaut hor i zed i nspect i on agency as def i ned i n Par t I , I t ems 7and 27. Upon t he expi r at i on of 90 days, a appl i cant whof ai l ed t o pass t he exami nat i on wi l l be per mi t t ed t o t akeanot her wr i t t en exami nat i on and hi s accept ance orr ej ect i on wi l l be det er mi ned by t he Admi ni st r at or on t hebasi s of t hi s exami nat i on.

5. EXAMI NATI ON FEES A Fee of si xty dol l ar s ( 60. 00 wi l l be charged f or eachappl i cant t aki ng t he exami nat i on f or a cer t i f i cat e of

compet ency.

6. CERTI FI CATE OF COMPETENCY AND I DENTI FI CATI ON CARD` Upon r equest of hi s empl oyer , a cer t i f i cat e of compet ency

and an i dent i f i cat i on car d may be i ssued by t heAdmi ni st r at or t o:

( a) a boi l er and pr essur e vessel i nspect or empl oyed by t heSt at e of Rhode I sl and.

( b) an i nspect or who i s empl oyed by an i nsur ance companywhi ch i s aut hori zed t o i nsur e and does i nsur e agai nstl oss f r om expl osi ons of boi l er s and pr essur e vessel si n t he St at e of Rhode I sl and.

( c) an i nspect or empl oyed as descr i bed i n ei t her ( a) or( b) above who conduct s shop or f i el d i nspect i ons of new boi l er s or pr essure vessel s i n accordance wi t h t heappl i cabl e ASME Code r equi r ement s.



13

( d) an i nspect or who i s cont i nuousl y empl oyed by a company

whi ch oper at es pr essure vessel s i n t hi s St at e and hasa val i d owner- user i nspect i on agency agr eement aspr ovi ded i n Par t I I , Sect i on 11, pr ovi ded t hat t heappl i cant has sat i sf act or i l y passed t he exami nat i on asset f or t h i n Par t I I , Secti on 4 or pr ovi ded t hat( s) he hol ds a val i d commi ssi on or cer t i f i cat e of compet ency f r om a St at e t hat has a st andard of exami nat i on subst ant i al l y equal t o t hat of t hi s

j ur i sdi ct i on and a val i d commi ss i on and a cur r entcommi ssi on car d i ssued by t he Nat i onal Boar d. Ther equest f or t he cer t i f i cat e of compet ency andi dent i f i cat i on car d shal l be compl et ed on f orms t o bepr ovi ded by t he Admi ni st r at or and shal l be accompani edby, when appl i cabl e, a f acsi mi l e of the appl i cant ' scommi ssi on and commi ssi on car d, cer t i f i cat e of compet ency and i dent i f i cat i on car d as named above,and a f ee of si xt y dol l ar s ( $60. 00)

The cer t i f i cat e of compet ency and val i d i dent i f i cat i oncard shal l be r et ur ned t o t he Admi ni st r at or when t hei nspect or t o whom t hey were i ssued i s no l ongerempl oyed by t he or gani zat i on empl oyi ng hi m at t he t i met hat t he cer t i f i cat e was i ssued.

Each per son hol di ng a val i d cer t i f i cat i on of compet ency and who conduct s i nspect i ons as pr ovi dedby t he Act shal l appl y t o t he Admi ni st r at or on f ormspr ovi ded and obt ai n a renewal i dent i f i cat i on car dannual l y, not l at er t han March 31 of each year. Af ee of $30. 00 f or each car d shal l accompany eachappl i cat i on.

An i nspect or' s cer t i f i cat e of compet ency may besuspended by t he Admi ni st r at or af t er due i nvest i gat i onand r ecommendat i on by t he Chi ef I nspect or f or adequat eand j ust cause. Wr i t t en not i ce of any such suspensi onshal l be gi ven by t he Admi ni st r at or, wi t hi n not moret han 10 days, t o t he i nspect or and hi s empl oyer.Per sons whose cer t i f i cat es of compet ency have beensuspended shal l be ent i t l ed t o an appeal t o t heAdmi ni st r at or as pr ovi ded f or i n t he Act and t o bepr esent i n per son and r epr esent ed by counsel at t hehear i ng of t he appeal .

7. CONFLI CT OF I NTEREST

An i nspect or shal l not engage i n t he sal e of any ser vi ces,ar t i cl e or devi ce r el at i ng t o boi l er s, pr essur e vessel s,or t hei r appur t enances.

8. I NSPECTI ON REPORTS TO BE SUBMI TTED BY I NSPECTORS ( a) I nspect or s empl oyed by an I nsur ance Company shal l ,

wi t hi n one year of t he ef f ect i ve date of t hese r ul esand r egul at i ons f or boi l er s and t hr ee year s f orpr essur e vessel s, submi t t o t he Chi ef I nspect or ani nspect i on r epor t on For m NB- 5 of NATI ONAL BOARD



14

I NSPECTI ON CODE f or each boi l er and pressur e vessel

subj ect t o i nspect i on i n t hi s St at e. Compl et e dat ashal l be submi t t ed on For m NB- 5 f or each nonst andardboi l er or pr essur e vessel .

( b) Subsequent i nspect i ons by aut hori zed i nsur ancei nspect or s, of bot h st andar d and nonst andar d boi l er sand pr essure vessel s shal l be r eport ed on For m NB- 6and NB- 7 of t he NATI ONAL BOARD I NSPECTI ON CODE.

( c) I nspect i on r eport s are r equi r ed i n ( a) and ( b) aboveshal l be submi t t ed wi t hi n 21 days f r om dat e of t hecompl et i on of t he i nspect i on.

( d) Owner - user i nspect i on agenci es shal l r epor t i naccor dance wi t h ( b) and ( d) above or upon f or msaccept abl e t o t he Chi ef I nspect or or Admi ni st r ator ,whi ch shal l be f i l ed as pr ovi ded i n Sect i on 11 of Par t

I I .9. I NSURANCE COMPANI ES TO NOTI FY CHI EF I NSPECTOR OF NEW,

CANCELLED OR SUSPENDED I NSURANCE ON BOI LERS OR PRESSUREVESSELS Al l i nsur ance compani es shal l not i f y t he Chi ef I nspect orwi t hi n 30 days, of al l boi l er s or pr essur e vessel s onwhi ch i nsurance i s wr i t t en, cancel l ed, not r enewed orsuspended because of unsaf e condi t i ons.

10. AUTHORI ZED I NSPECTORS TO NOTI FY CHI EF I NSPECTOR OF UNSAFEBOI LERS OR PRESSURE VESSELS I f an aut hor i zed i nspector, upon f i r st i nspecti on of anew r i sk, f i nds t hat a boi l er or pr essur e vessel or anyappur t enance t her eof , i s i n such condi t i on t hat hi scompany woul d r ef use i nsur ance or t hat i t does not compl ywi t h j ur i sdi ct i onal r ul es, t he company shal l i mmedi atel ynot i f y t he Chi ef I nspect or and submi t a r eport on t hedef ect s. I f , upon i nspect i on, an aut hor i zed i nspect orf i nds a boi l er or pr essur e vessel t o be unsaf e f or f ur t heroper at i on, he shal l pr ompt l y not i f y t he owner or user ,st at i ng what r epai r s or ot her corr ect i ve measur es arer equi r ed t o br i ng t he obj ect i nt o compl i ance wi t h t heser ul es and r egul at i ons. Unl ess t he owner or user makessuch r epai r s or adopt s such ot her cor r ect i ve measur espr ompt l y, t he aut hor i zed i nspect or shal l i mmedi atel y

not i f y t he Chi ef I nspect or . Unt i l such cor r ect i ons havebeen made no f ur t her operat i on of t he boi l er or pr essurevessel i nvol ved shal l be per mi t t ed. I f an i nspect i oncer t i f i cat e f or t he obj ect i s r equi r ed and i s i n f or ce,i t shal l be suspended by t he Chi ef I nspect or. Whenr e- i nspect i on est abl i shes t hat t he necessar y r epai r s havebeen made or cor r ect i ve act i ons have been t aken and t hatt he boi l er or pr essur e vessel i s saf e t o oper at e, t heChi ef I nspect or shal l be not i f i ed by r epor t . At t hat t i mean i nspecti on cer t i f i cat e, wher e appl i cabl e, wi l l be



15

i ssued.

11. OWNER- USER I NSPECTI ON AGENCY ( a) Any per son, f i r m par t ner shi p, or cor por at i on

oper at i ng pr essur e vessel s i n t hi s j ur i sdi ct i on mayseek appr oval and r egi st r at i on as an owner- useri nspect i on agency by f i l i ng an appl i cat i on wi t h t heAdmi ni st r at or on pr escr i bed f or ms and r equest appr ovalby t he Di vi si on. Each such appl i cat i on shal l beaccompani ed by a f ee of si xt y dol l ars ( 60. 00) bondi n t he penal sum of t went y- f i ve t housand dol l ar s( $25, 000) whi ch shal l cont i nue t o be val i d dur i ng thet i me t he appr oval and r egi st r at i on of t he company asan owner - user i nspect i on agency i s i n ef f ect .

( b) Appl i cat i on and r egi st r at i on shal l show t he name of such agency and i t s pr i nci pal addr ess i n t hi s St at e,and t he name and addr ess of t he per son or per sonshavi ng supervi si on over i nspect i ons made by sai d

agency. Changes i n supervi sor y personnel shal l ber eport ed t o t he Admi ni st r at or wi t h 30 days af t er anysuch change.

( c) Each owner- user i nspect i on agency as r equi r ed by t hepr ovi si ons of t he Act and t hese r ul es and r egul at i onss hal l :

( l ) conduct i nspect i ons of pr essur e vessel s, notexempt by t he Act , ut i l i zi ng onl y qual i f i edi nspect i on per sonnel , as pr ovi ded i n Par t I I ,Sect i on 6;

( 2) r et ai n on f i l e at t he l ocat i on wher e t he equi pmenti s i nspect ed, a t r ue r ecord or copy of each of t he l at est i nspect i on r epor t s si gned by t hei nspect or ;

( 3) execut e and del i ver t o t he Chi ef I nspect or andt hose r esponsi bl e f or t he oper ati on of t hepr essur e vessel , a t r ue r epor t of each i nspect i ont oget her wi t h appr opr i at e r equi r ement s orr ecommendat i ons t hat r esul t f r om such i nspect i ons;

( 4) pr ompt l y noti f y t he Chi ef I nspect or of anypressur e vessel whi ch does not meet t he

r equi r ement s f or saf et y;( 5) mai nt ai n i nspect i on r ecor ds whi ch wi l l i ncl ude a

l i st of each pr essur e vessel cover ed by t he Act ,showi ng a ser i al number and such abbr evi at eddescr i pt i ons as may be necessary f ori dent i f i cat i on, t he dat e of l ast i nspecti on of each uni t and approxi mat e dat e f or t he nexti nspect i on, ar r i ved at by appl yi ng t heappr opr i at e r ul es t o al l dat a avai l abl e at t he



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t i me such i nspect i on r ecor d i s compi l ed.

Regardi ng f r equency and t ype of i nspect i on, seePar t I I , Sect i on 2. Such i nspect i on r ecor d shal lbe r eadi l y avai l abl e f or exami nat i on by t he Chi ef I nspect or or hi s aut hor i zed r epr esent at i ve dur i ngbusi ness hour s.

12. DEFECTI VE CONDI TI ONS DI SCLOSED AT TI ME OF EXTERNALI NSPECTI ON I f , upon an external i nspect i on, t her e i s evi dence of al eak or crack, suf f i ci ent cover i ng of t he boi l er orpr essur e vessel shal l be r emoved t o permi t t he i nspect ort o sat i sf act or i l y det er mi ne t he saf et y of t he boi l er orpr essur e vessel I f t he coveri ng cannot be r emoved at t hatt i me, he may or der t he oper at i on of t he boi l er orpr essure vessel s t opped unt i l such t i me as t he cover i ngcan be removed and pr oper exami nat i on made.

13. OWNER OR USER TO NOTI FY CHI EF I NSPECTOR OF ACCI DENT When an acci dent occur s t o a boi l er , pr essure vessel ,power pi pi ng or pr ocess pi pi ng, t he owner or user shal lpr ompt l y not i f y t he Chi ef I nspect or by submi t t i ng adet ai l ed r epor t of t he acci dent . I n t he event of aper sonal i nj ur y or any expl osi on, not i ce shal l be gi veni mmedi at el y by t el ephone, t el egr aph or messenger , andnei t her t he boi l er , pr essur e vessel , power pi pi ng orpr ocess pi pi ng , nor any par t s ther eof , shal l ber emoved or di st urbed bef or e per mi ss i on has been grant edby t he Chi ef I nspect or , except f or t he pur pose of savi nghuman l i f e and l i mi t i ng consequent i al damage.

14. I NSPECTI ON CERTI FI CATE AND I NSPECTI ON FEES ( a) Cer t i f i cat e I nspect i on by Aut hor i zed I nsur ance

I nspect or s or St at e I nspect or s

I f , af t er i nspect i on by an aut hor i zed i nsur anceI nspect or or st at e i nspect or , a boi l er or pr essur evessel i s f ound t o be saf e and i n conf ormancewi t h t hese r ul es and r egul at i ons, t he owner oruser shal l pay di rect l y t o t he j ur i sdi c t i on abi enni al cer t i f i cat e f ee of one hundr ed t went ydol l ars ( $120. 00) f or each boi l er whi ch shal li ncl ude hot wat er heat er s. A t r i enni al cer t i f i cat ef ee of ni net y dol l ars ( $90. 00) shal l be assessed f or

each unf i r ed pr essure vessel i nspect ed under t hepr ovi si ons of R. I . G. L. 28- 25.

( b) Cer t i f i cat e I nspect i on by Aut hori zed Owner / UserI nspect i on Agency

I f a boi l er or pr essur e vessel af t er i nspecti on, byan aut hori zed owner / user i nspect i on agency i s f oundt o be sui t abl e and t o conf or m t o t hese r ul es andr egul at i ons, t he owner or user shal l pay di r ect l y to



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t he j ur i sdi cti on a f ee of si xt y dol l ar s ( $60. 00) f oreach boi l er or pr essur e vessel r equi r ed t o bei nspect ed under t he Act upon whi ch an i nspect i oncer t i f i cat e shal l be i ssued i n accor dance wi t hChapt er 28- 25- 10 and 28- 25- 11. Checks and moneyor der s f or payment of i nspect i on cer t i f i cat e f eesshoul d be made payabl e t o t he Depar t ment of Labor , Di vi si on of Occupat i onal Saf et y, Boi l erUni t .

( c) Cer t i f i cat e I nspect i on by St at e I nspect or

The owner or user of a boi l er or pr essur e vesselr equi r ed by t hi s Act t o be i nspect ed by t he Chi ef I nspect or , or by an aut hori zed St at e i nspect or ,shal l pay di r ect l y t o t he Di vi si on of Occupat i onalSaf et y, upon compl et i on of i nspect i on, f ees i naccordance wi t h t he f ol l owi ng schedul e:

( l ) Power boi l er s and hi gh pr essure, hi gh t emper at ur e

wat er boi l er sCer t i f i cat e and I nspect i on Fees

Boi l er s of 50 sq. f t . of heat i ng sur f ace orl ess. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 96. 00

Boi l er s over 50 sq. f t . of heat i ng sur f ace and l esst han 2, 000 sq. f t . of heat i ng sur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $120. 00

Boi l er s over 2, 000 sq. f t . of heat i ng sur f ace ormore and l ess t han 4, 000 sq. f t . of heat i ngsur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $140. 00

Boi l er s of 4, 000 sq. f t . of heat i ng sur f ace or mor eand l ess t han l 0, 000 sq. f t . of heat i ngsur f ace. . . . . . . . . . . . . . . . $180. 00

Boi l er s of l 0, 000 sq f t of heat i ng sur f ace ormor e . . . . . . . . . . . . . . . . . . . $240. 00

Ext er nal I nspect i onsBoi l er s of 50 sq. f t . of heat i ng sur f ace or

l ess. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $30. 00

Boi l er s over 50 sq. f t . of heat i ng sur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $60. 00

Not more t han t he equi val ent of t he cer t i f i cat e andexter nal i nspect i on f ees shal l be charged orcol l ect ed f or any and al l i nspect i ons as above of anyboi l er i n any one ( 1) year except as pr ovi ded i npar agr aphs 5 and 6 bel ow. Si ze equi val enci es may bef ound i n Sect i on 27.



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( 2) Heat i ng Boi l er s

Cer t i f i cat e and I nspect i on Fees( i ) A si ngl e f ee shal l be assessed f or i nspect i onsof boi l er s and st orage t anks at t he same l ocat i oni n accordance wi t h t he f ol l owi ng schedul e:

Heat i ng boi l er s wi t hout a manhol e. . . . . $60. 00 Annual l y

Heat i ng boi l er s wi t h a manhol e. . . . . . . $120. 00 Annual l y

Hot wat er suppl y boi l er s . . . . . . . . . . . . . . $60. 00Annual l y( i i )Wat er heat er wi t h st or age t anks. . . . . . . $60. 00 Annual l ynot t o exceed $240. 00 annual l y per l ocat i on

( 3) For boi l er s wher e t he onl y sour ce of heat i sel ect r i cal ener gy, t he f ees of par agr aphs l and 2shal l appl y based on one ki l owat t bei ng equal t o onesquar e f oot of heat i ng sur f ace.

( 4) Pressur e Vessel s

Cer t i f i cat e and I nspect i on Fees

Each pr essur e vessel subj ect t o i nspect i on shal l bechar ged at a rat e of $30. 00 per year per vessel .A gr oup of pr essur e vessel s, such as t he r ol l s of apaper machi ne or dr yer operat i ng as a si ngl e machi neor uni t , shal l be consi der ed as one pr essur e vessel .

Not more t han one f ee shal l be char ged or col l ect edf or any and al l i nspect i ons as above of any pr essurevessel s i n any r equi r ed i nspect i on per i od except asprovi ded i n par agr aph 5 bel ow.

( 5) Hydr ost at i c t est sWhen i t i s necessar y t o make a speci al t r i p t o wi t nesst he appl i cat i on of a hydr ost at i c t est , an addi t i onalf ee based on t he scal e of f ees out l i ned i n Par agr aph#6 bel ow shal l be char ged.

( 6) Al l ot her i nspect i ons, i ncl udi ng r evi ews andsur veys, shop i nspect i ons, speci al i nspect i ons,and i nspect i ons of second- hand or used boi l er s, orpressur e vessel s made by t he Chi ef I nspect or oraut hor i zed i nspect or empl oyed by t he St at e of Rhode

I sl and shal l be charged at t he r at e of not l ess t han$190. 00 f or 1/ 4 day ( 2 Hr s. ) , $275. 00 1/ 2 day ( 4Hr s. ) , or $500. 00 f or one f ul l day, i ncl udi ngt r avel t i me, pl us al l expenses, i ncl udi ngt r avel i ng, meal s and l odgi ng, wher e appl i cabl e.Mi ni mum char ge shal l be 1/ 4 day ( $190. 00) .



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( d) Di sposi t i on of f ees - The Admi ni st r at or shal l account f orand t r ansf er al l f ees so r ecei ved t o t he Tr easur er of t heSt at e.

( e) I f t he owner or user of a boi l er or pr essur e vessel orsyst em, whi ch i s r equi r ed t o be i nspect ed r ef uses t oal l ow an i nspect i on t o be made or r ef uses t o pay t he f eest i pul at ed above, t he i nspecti on cer t i f i cat e shal l besuspended by t he Chi ef I nspect or unt i l t he owner or usercompl i es wi t h t he r equi r ement s.

( f ) The owner or user who causes a boi l er or pr essur e vesselor syst em t o be oper at ed wi t hout a val i d cer t i f i cat eshal l be subj ect t o t he penal t y as pr ovi ded f or i n t heAct .

7. FEES FOR SERVI CES

( a) Hydr ost at i c t est s by st at e i nspect i ons $l 00. 00

( b) Repai r and al t er ati on per mi t 100. 00

( c) Ret ur n vi si t s f or vi ol at i ons/ char ged t o cont r act or s 100. 00

( d) Ret ur n check f ee 25. 00

( e) Over due i nvoi ces 25. 00

( f ) Cer t i f i cat e r epl acement f ee 10. 00

( g) Por t abl e boi l er per mi t s 300. 00

15. VALI DI TY OF I NSPECTI ON CERTI FI CATE An i nspect i on cer t i f i cat e, i ssued i n accor dance wi t h Par t I I ,Sect i on 14 shal l be val i d unt i l expi r ati on unl ess some def ector condi t i on af f ect i ng t he saf et y of t he boi l er or pr essur evessel i s di scl osed pr ovi ded, however , t hat a cer t i f i cat ei ssued f or a boi l er or pr essur e vessel i nspect ed by anaut hor i zed i nspect or empl oyed by an i nsur ance company shal lbe val i d onl y i f t he boi l er or pr essur e vessel f or whi ch i twas i ssued cont i nues t o be i nsur ed by a dul y aut hor i zedi nsur ance company.

16. RESTAMPI NG BOI LERS AND PRESSURE VESSELSWhen t he st ampi ng on a boi l er or pressur e vessel becomesi ndi st i nct , t he i nspect or shal l i nst r uct t he owner or usert o have i t r e- st amped. Request f or per mi ssi on t o r e- st amp t heboi l er or pr essure vessel shal l be made t o t he Chi ef

I nspect or and pr oof of t he ori gi nal st ampi ng shal l accompanyt he r equest . The Chi ef I nspect or may gr ant suchaut hori zat i on. Re- st ampi ng aut hori zed by t he Chi ef I nspect orshal l be done onl y i n t he pr esence of an aut hori zedi nspect or , and shal l be i dent i cal wi t h t he or i gi nal st ampi ngexcept f or t he ASME Code Symbol St amp. Not i ce of compl et i onof such st ampi ng shal l be f i l ed wi t h t he Chi ef I nspect or byt he i nspect or who wi t nessed t he st ampi ng on t he boi l er orpr essure vessel t oget her wi t h a f acsi mi l e of t he st ampi ngappl i ed.



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17. PENALTY FOR OPERATI ON OF UNSAFE BOI LERS OR PRESSURE VESSELS ( a) I f , upon i nspecti on, a boi l er or pr essur e vessel i s

f ound t o be i n such condi t i on t hat i t i s unsaf e t ooper at e, t he i nspect or shal l not i f y t he Chi ef I nspect orand t he i nspect i on cer t i f i cat e may be suspended by t heChi ef I nspect or .

( b) Any per son, f i r m, part ner shi p or cor por ati on causi ngsuch obj ect s t o cont i nue t o be oper at ed shal l be subj ectt o t he penal t y pr ovi ded i n t he Act .

18. CONDEMNED BOI LERS AND PRESSURE VESSELS ( a) Any boi l er or pressur e vessel havi ng been i nspect ed and

decl ar ed unf i t f or f ur t her servi ce by an i nspect or shal lbe st amped by t he Chi ef I nspect or or a deput y i nspect oron ei t her si de of t he St at e number wi t h t he l et t er s " XXX"as shown by t he f ol l owi ng f acsi mi l e, whi ch wi l l

desi gnat e a condemned boi l er or pr essur e vessel :( b) Any per son, f i r m, par t ner shi p, or cor por at i on usi ng or

of f er i ng f or sal e a condemned boi l er or pr essur e vesself or oper at i on wi t hi n t hi s St at e shal l be subj ect to t hepenal t i es provi ded by t he Act .

19. REI NSTALLATI ON OF BOI LERS OR PRESSURE VESSELS When a st andard boi l er or pr essure vessel l ocat ed i n t hi s

j ur i sdi ct i on i s t o be moved out si de t he j ur i sdi ct i on f ort empor ar y use or f or r epai r , al t er at i on, or modi f i cat i on,appl i cat i on shal l be made by t he owner or user t o t he Chi ef I nspector f or per mi ssi on t o r ei nst al l t he boi l er or pr essur evessel i n t he j ur i sdi ct i on. When a nonst andard boi l er orpr essur e vessel i s r emoved f r om t hi s St at e, i t shal l not bere i ns ta l l ed wi t hi n t hi s St at e.

20. I NSTALLATI ON, OPERATI ON, SALE OR OFFERI NG FOR SALE OFNON- STANDARD BOI LERS OR PRESSURE VESSELS

The i nst al l at i on, operat i on, sal e or t he of f er i ng f or sal eof nonst andar d boi l er s or pr essur e vessel s i n t hi s

j ur i sdi ct i on i s pr ohi bi t ed wi t hout permi ss i on f r om t he Chi ef I nspect or .

21. I NSTALLATI ON OF USED OR SECOND- HAND BOI LERS OR PRESSUREVESSELS Bef or e a used or s econd- hand boi l er or pr essur e vessel can be

shi pped f or i nst al l at i on i n t hi s St at e, an i nspect i on mustbe made by an i nspect or qual i f i ed by t hi s j ur i sdi ct i on or byan i nspect or hol di ng a val i d Nat i onal Boar d Commi ssi on, anddat a submi t t ed by hi m shal l be f i l ed by t he owner or user of t he boi l er or pr essur e vessel wi t h t he Chi ef I nspect or f orhi s appr oval . Such boi l ers and pr essure vessel s wheni nsta l l ed i n t he j ur i sdi c t i on shal l be equi pped wi t h f i t t i ngsand appurt enances t hat compl y wi t h t he r ul es and r egul at i onsf or new const r uct i on.



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22. REI NSTALLED BOI LERS OR PRESSURE VESSELS When a st at i onary boi l er or pr essur e vessel i s moved andr ei nst al l ed, t he at t ached f i t t i ngs and appur t enances shal lcompl y wi t h t hese r ul es and r egul at i ons f or newi ns t al l at i ons .

23. WORKI NG PRESSURE FOR EXI STI NG I NSTALLATI ONS Any aut hor i zed i nspect or may decr ease t he wor ki ng pressur e onany exi st i ng i nst al l at i on i f t he condi t i on of t he boi l er orpr essure vessel warr ant s i t . I f t he owner or user does notconcur wi t h t he i nspect or' s deci si on, t he owner or user mayappeal t o t he Admi ni st r at or who may r equest a j oi nti nspect i on by t he Chi ef I nspect or and t he aut hor i zedi nspect or . The Chi ef I nspect or shal l render hi s r epor t t ot he Admi ni st r at or and t he Admi ni st r at or shal l r ender t hef i nal deci si on, based upon t he dat a cont ai ned i n t hei nspector ' s r epor t s.

24. REPAI RS AND ALTERATI ONS TO BOI LERS & PRESSURE VESSELS ( a) Repai r s and al t er ati ons t o boi l er s and pr essur e vessel s

shal l be made i n accor dance wi t h t he r ul es of t heNATI ONAL BOARD I NSPECTI ON CODES l at est edi t i on.Repai r s shal l be made by a r epai r organi zat i on havi ng oneof t he f ol l owi ng t ypes of aut hor i zat i on:

( 1) an or gani zat i on i n possessi on of a val i d Cer t i f i cat eof Aut hor i zat i on f or use of t he " R" Symbol St amp,i ssued by t he Nat i onal Boar d.

( 2) an or gani zati on i n possessi on of a val i d ASMECer t i f i cat e of Aut hor i zat i on pr ovi ded such r epai r sar e wi t hi n t he scope of t he or gani zat i on' s Qual i t yCont r ol Syst em.

( 3) an or gani zati on worki ng wi t hi n t he St at e pr ovi dedaut hor i zat i on f or t he or gani zat i on t o per f or m suchr epai r s has been i ssued by t he Chi ef I nspect or.

( b) Al t er at i ons t o a boi l er or pr essur e vessel shal l be madeby an organi zat i on i n possessi on of a val i d ASMECer t i f i cat e of Aut hor i zat i on.

25. REPAI RS TO PRESSURE RELI EF VALVES ( a) Repai r s t o pr essur e r el i ef val ves shal l be made onl y by

an or gani zat i on whi ch hol ds a val i d Cer t i f i cat i on of Aut hori zat i on f or use of t he Nati onal Boar d Pr essur e

Rel i ef Val ve Repai r " VR" Symbol St amp. The i ni t i ali nst al l at i on t est i ng and adj ust ment s of a new pr essur er el i ef val ve on a boi l er or pr essur e vessel ar e notconsi dered a r epai r , i f made by t he manuf act ur er orassembl er of t he val ve.

( b) The Chi ef I nspect or may aut hori ze pr oper l y t r ai ned andqual i f i ed empl oyees of boi l er and pr essure vessel usersor t hei r desi gnees t o make adj ust ment s t o set pr essur eand/ or bl ow- down t o pr essur e r el i ef val ves owned by t hem,



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pr ovi ded t he adj ust ed set t i ngs and/ or capaci t i es and t hedat e of t he adj ust ment ar e r ecor ded on a met al t agsecur ed t o t he seal wi r e. Al l ext er nal adj ust ment s shal lbe r eseal ed showi ng t he i dent i f i cat i on of t heorgani zat i on maki ng t he adj ust ment s. A r ecor d of al lext er nal adj ust ment s shal l be mai nt ai ned and madeavai l abl e t o t he i nspect or .

( c) No per son shal l at t empt t o r emove or do any wor k on anysaf et y appl i ance pr escri bed by t hese r ul es andr egul at i ons whi l e t he appl i ance i s subj ect t o pr essur e.

( d) Shoul d any of t hese appl i ances be r emoved f or r epai rdur i ng an out age of a boi l er or pr essur e vessel , t heymust be r ei nst al l ed and i n pr oper worki ng order bef oret he obj ect i s agai n pl aced i n ser vi ce.

( e) No per son shal l al t er any saf et y or saf et y r el i ef val vesor pr essure r el i ef devi ces i n any manner t o mai nt ai n aworki ng pr essure i n excess of t hat st at ed on t he boi l er

or pr essur e vessel i nspect i on cer t i f i cat e.26. RI VETED PATCHES

I n appl yi ng r i vet ed pat ches, t he desi gn of t he pat ch andmet hod of i nst al l at i on shal l be i n accor dance wi t h t heNat i onal Boar d I nspect i on Code, 1973 Edi t i on. Appr oval f orsuch r epai r s must be obt ai ned f r om t he chi ef i nspect or pri ort o maki ng such repai r s.

27. REQUI REMENTS FOR NEW I NSTALLATI ONS I n accor dance wi t h Chapt er 28- 25- 10, any pers on erect i ng ori nst al l i ng a new or second- hand boi l er or pr essur e vesselshal l f i r st make appl i cat i on f or a per mi t t o i nst al l t o t heDi vi si on of Occupat i onal Saf et y, Boi l er Uni t . A per mi tf ee of one hundr ed t went y dol l ar s ( $l 20. 00) wi l l be r equi r edf or al l heat i ng boi l er s ( l ow pr essur e) and a f ee of t hr eehundr ed dol l ar s ( $300. 00) f or al l power boi l er s ( hi ghpr essur e) . The i nst al l er of such i nst al l at i ons must recor dhi s/ her Pi pef i t t er Mast er I l i cense number on the per mi tappl i cat i on.

Al l new and second- hand i t em i nst al l ati ons shal l compl y wi t ht he gener al r equi r ement s i n Par t I V of t hese r egul at i ons. I naddi t i on, appl i cabl e sect i ons of t hese r egul at i ons t hatper t ai n t o t he speci f i c r equi r ement s f or i t ems f al l i ng i nt ocat egor i es out l i ned i n Secti on I I I , Par t s 1, 2 and 3,shal l be f ol l owed.

( a) No boi l er or pr essur e vessel shal l her eaf t er be i nst al l edi n t hi s St at e unl ess i t has been const r uct ed i naccor dance wi t h ASME Code, r egi st ered wi t h t he Nat i onalBoar d and i nst al l ed i n conf or mi t y wi t h t hese r ul es andr egul at i ons except :

( l ) t hose exempt by t he Act ;

( 2) t hose out l i ned i n Par t I I , Secti on 1 ( b) .



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( b) The st ampi ng shal l not be conceal ed by l aggi ng or pai ntand shal l be exposed at al l t i mes unl ess a sui t abl er ecor d i s kept of t he l ocat i on of t he st ampi ng so t hat i tmay be r eadi l y uncover ed at any t i me t hi s may be desi r ed.

28. APPLI CATI ON OF STATE SERI AL NUMBERS ( a) Upon compl et i on of t he i nst al l at i on of a boi l er or

pr essur e vessel , or at t he t i me of the i ni t i alcer t i f i cat e i nspect i on of an exi s t i ng i ns ta l l at i on eachboi l er or pr essur e vessel shal l be i dent i f i ed by t hei nspect or wi t h a ser i al number of t he St at e, consi st i ngof l et t er s and f i gur es t o be not l ess t han 5/ l 6 i nch i nhei ght and ar r anged as f ol l ows:

( R. I . ) _________XXXX

( b) Al l cast i r on, l ow- pr essur e heat i ng boi l er s shal l havesecur el y at t ached t o t he f r ont of t he boi l er a cor r osi on

r esi st ant met al t ag or sui t abl e t ag al l owed byconst r uct i on code , whi ch shal l have t he seri al numberof t he St at e st amped t her eon. Al l pr essure vessel sconst r uct ed of cast i r on, or of mat er i al of sucht hi ckness t hat i t shoul d not be st amped, shal l havesecur el y at t ached a cor r osi on r esi st ant met al t ag and orsui t abl e t ag al l owed by t he const r uct i on code , whi chshal l have t he ser i al number of t he St at e st ampedt hereon.

29. VARI ATI ONS ( a) Any per son who bel i eves t he r ul es and regul at i ons

promul gat ed under 28- 25 of t he Gener al Laws i mpose anundue bur den upon t he owner or user , may r equest avar i at i on f r om such r ul e or regul at i on. The r equest f orvar i at i on shal l be made t o t he Admi ni st r at or of Occupat i onal Saf et y i n wr i t i ng and shal l speci f y howequi val ent saf et y i s t o be mai nt ai ned. TheAdmi ni st r ator , af t er i nvest i gat i on and such hear i ng asi t may di r ect , may gr ant such var i at i on f r om t he t er msof any r ul e or r egul at i on pr ovi ded such speci alcondi t i ons as may be speci f i ed are mai nt ai ned i n or der t opr ovi de equi val ent saf et y.

( b) Any pers on deni ed a var i ance under Sect i on 30 ( a) of t hese r ul es, may gr i eve such det ermi nat i on by submi t t i ngsuch appeal i n wr i t i ng t o t he Occupat i onal Saf et y and

Heal t h Revi ew Board. Sai d boar d, cr eat ed by Chapt er28- 20 of t he Gener al Laws, shal l hear evi denceconcerni ng such act i on and det ermi ne whet her sai dvar i at i on does, i n f act , pr ovi de f or equi val ent saf et y.

( c) When t her e i s a r eason t o bel i eve, or upon r ecei pt of acompl ai nt t hat a var i at i on does not provi de f r eedom f r omdanger equi val ent t o t he publ i shed r ul e or r egul at i on,t he Admi ni st r at or or Chi ef I nspect or by di r ect i on af t ernot i ce t o t he owner or user and compl ai nant , and af t erheari ng and i nvest i gat i on as i t may di r ect , may cont i nue



24

i n f or ce, suspend, r evoke, or modi f y t he condi t i onsspeci f i ed i n any var i at i on. No decl ar at i on, act oromi ssi on of t he Admi ni st r at or or of t he Chi ef I nspect or ,or aut hor i zed i nspect or s ot her t han a wr i t t en orderaut hori zi ng a var i at i on as per mi t t ed above, shal l bedeemed t o exempt , ei t her whol l y or i n part , expr essl yor i mpl i ed, any owner or user f r om f ul l compl i ance wi t ht he t er ms of any rul e or r egul at i on.

30. PENALTI ES Any per son, f i r m or cor por at i on vi ol at i ng any of t hepr ovi si ons of t hese r ul es and r egul ati ons shal l be chargedwi t h a vi ol at i on and may be subj ect t o a f i ne not t o exceed$500. 00 per day f or each such vi ol at i on. The Depar t ment of Labor shal l i mpose sai d f i ne on t he i nst al l er of newconst r uct i on or t he owner / user of exi st i ng boi l er s orpr essur e vessel s as pr ovi ded f or i n Sect i on 28- 25- 16 of t heAct . Each day of such oper ati on i n vi ol at i on of t hepr ovi si ons shal l be consi der ed a separ at e of f ense.

PART I I I

EXI STI NG I NSTALLATI ON

The t er m " exi st i ng i nst al l at i on", as used i n t hi s par t , meansany boi l er or pr essur e vessel as def i ned i n Sect i on 1 of t heser ul es i nst al l ed pr i or t o J ul y 1, 1985.

SECTI ON 1 - POWER BOI LERS

EBO- 1 - Age Li mi t of Exi st i ng Boi l er s( a) The age l i mi t of any boi l er of nonst andar d const r uct i on,

i nst al l ed pr i or t o t he dat e t he Act became ef f ect i ve, shal lbe 30 years except t hat , a boi l er havi ng ot her t hanl ap- r i vet ed l ongi t udi nal j oi nt , af t er a t hor ough i nt er naland ext ernal i nspect i on, and when r equi r ed by t hei nspect or , a hydr ost at i c pr essur e t est of 1- 1/ 2 t i mes t heal l owabl e wor ki ng pr essur e hel d f or a per i od of at l east 30mi nut es dur i ng whi ch no di st r ess or l eakage devel ops, maybe cont i nued i n operat i on at t he wor ki ng pr essur e det ermi nedby EBO- 3. The age l i mi t of any nonst andard boi l er havi ngl ap- r i vet ed l ongi t udi nal j oi nt s and oper at i ng at a pr essur ei n excess of 50 psi shal l be 20 year s. Thi s t ype of boi l er ,when r emoved f r om an exi st i ng set t i ng, shal l not ber ei nst al l ed f or a pr essur e i n excess of l 5 psi . Ar easonabl e t i me f or r epl acement , not t o exceed one year ,

may be gi ven at t he di scr et i on of t he Chi ef I nspect or.( b) The age l i mi t of boi l er s of st andar d const r ucti on i nst al l ed

pr i or t o t he dat e t hi s l aw became ef f ect i ve shal l bedependent on t hor ough i nt ernal and ext ernal i nspect i on andwher e r equi r ed by t he i nspect or, a hydr ost at i c pr essur et est not exceedi ng 1- 1/ 2 t i mes t he al l owabl e worki ngpr essur e. I f t he boi l er , under t hese t est condi t i ons,exhi bi t s no di st r ess or l eakage, i t may be cont i nued i noperat i on at t he wor ki ng pressur e det ermi ned by EBO- 2.



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( c) The shel l or dr um of a boi l er i n whi ch a l ap seam cr ackdevel ops al ong a l ongi t udi nal l ap- r i vet ed j oi nt shal l becondemned. A l ap seam cr ack i s a cr ack f ound i n l ap seamsextendi ng par al l el t o t he l ongi t udi nal j oi nt and l ocat edei t her bet ween or adj acent t o ri vet hol es.

EBO- 2 Maxi mum Al l owabl e Worki ng Pr essur e f or St andar d Boi l er The maxi mum al l owabl e wor ki ng pr essur e f or st andar dboi l er s shal l be det er mi ned i n accor dance wi t h t he appl i cabl epr ovi si ons of t he edi t i on of t he ASME Code under whi ch t heywer e const r uct ed and st amped.

EBO- 3 Maxi mum Al l owabl e Wor ki ng Pr essur e f or Nonst andar dBoi l ers

( a) The maxi mum al l owabl e worki ng pr essur e f or boi l er sf abr i cat ed by r i vet i ng shal l be det er mi ned by t heappl i cabl e r ul es of t he 1971 Edi t i on of Sect i on I of t heASME Code.

The l owest f act or of saf et y permi ss i bl e on exi st i ngi nst al l at i ons shal l be 5. 0, except f orhor i zont al - r et ur n- t ubul ar boi l er s havi ng cont i nuousl ongi t udi nal l ap seams mor e t han 12 f t . i n l engt h, t hef act or of saf et y shal l be 8. When t hi s l at t er t ype of boi l ers i s removed f romi t s exi s t i ng set t i ng, i t shal lnot be r ei nst al l ed f or pr essur es i n excess of 15 psi .

( b) The maxi mum al l owabl e worki ng pr essure f or boi l er s of wel ded const r uct i on i n ser vi ce may not exceed t hatal l owabl e i n Sect i on I of t he ASME Code f or new boi l er sof t he same const r uct i on.

The maxi mum al l owabl e wor ki ng pr essur e on t he shel l of aboi l er or dr um shal l be det er mi ned by t he st r engt h of t heweakest cour se comput ed f r om t he t hi ckness of t he pl at e,t he t ensi l e st r engt h of t he pl at e, t he ef f i ci ency of t hel ongi t udi nal j oi nt , t he i nsi de di amet er of t he cour se,and t he f act or of saf et y al l owed by t hese r ul es i naccor dance wi t h t he f ol l owi ng f ormul a:

TSt E = maxi mum al l owabl e wor ki ng pr essur e, psi RFS where

TS = speci f i ed mi ni mum t ensi l e st r engt h of shel l pl at emat er i al . When t he t ensi l e st r engt h of st eel or

wr ought - i r on shel l pl at e i s not known, i t shal l bet aken as 55, 000 psi f or st eel and 45, 000 psi f orwr ought - i r on.

t = mi ni mum t hi ckness of shel l pl at e, i n weakestcour se, i n i nches.

E = ef f i ci ency of l ongi t udi nal j oi nt , met hod of det ermi ni ng whi ch i s gi ven i n Par agr aph PG- 27 of Sect i on I of t he ASME Code.



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R = i nsi de r adi us of t he weakest cour se of t he shel lor dr um, i n i nches.

FS = f act or of saf et y whi ch shal l be at l east 5. 0.

( c) The i nspect or may i ncrease t he f act or of saf et y, i f t hecondi t i on and saf et y of t he boi l er war r ant s i t .

EBO- 4 Cast I r on Header s and Mud Dr ums

The maxi mum al l owabl e wor ki ng pr essur e on a wat er t ube boi l er ,t he t ubes of whi ch are secur ed t o cast i r on or mal l eabl e i r onheaders, or whi ch have cast i r on mud drums, shal l not exceedl 60 psi .

EBO- 5 Pr essur e on Cast I r on Boi l er s

The maxi mum al l owabl e wor ki ng pr essur e f or any cas t i r onboi l er , except hot wat er boi l er s, shal l be 15 psi . See

EHB- 1, 2 and 4.EBO- 6 Saf et y Val ves

( a) The use of wei ght ed- l ever saf et y val ves or saf et y val veshavi ng ei t her t he seat or di sc of cast i r on ar e pr ohi bi t ed;val ves of t hi s t ype of const r uct i on shal l be r epl aced bydi r ect , spr i ng l oaded, pop- t ype val ves t hat conf or m t o t her equi r ement s of ASME Code, Sect i on I .

( b) Each boi l er shal l have at l east one ASME/ NB St amped andcer t i f i ed saf et y val ve, and i f i t has mor e t han 500 sq. f t .of wat er - heat i ng sur f ace, or an el ect r i c power i nput of mor et han l l 00 KW, i t shal l have t wo or more saf et y val ves of t hesame t ype.

( c) The val ve or val ves shal l be connect ed t o t he boi l er ,i ndependent of any ot her st eam connect i on; and at t ached ascl ose as possi bl e t o t he boi l er , wi t hout unnecessaryi nt er veni ng pi pe or f i t t i ngs. Wher e al t er at i on i s requi r ed t oconf orm t o t hi s requi r ement , owner s or user s shal l be al l owedr easonabl e t i me i n whi ch t o compl et e t he wor k as per mi t t ed byt he Chi ef I nspect or .

( d) No val ves of any descri pt i on shal l be pl aced bet ween t hesaf et y val ve and t he boi l er nor on t he escape pi pe, i f used.When an escape pi pe i s used, i t shal l be at l east t he f ul l

si ze of t he saf et y val ve di schar ge and f i t t ed wi t h an opendr ai n to pr event wat er l odgi ng i n the upper par t of t he saf et yval ve or i n t he escape pi pe. When an el bow i s pl aced on asaf et y val ve escape pi pe, i t shal l be l ocat ed cl ose t o t hesaf et y val ve out l et or t he escape pi pe shal l be anchored andsupport ed secur el y. Al l saf et y di schar ges shal l be so l ocat edor pi ped as t o be carr i ed cl ear f r om wal kways or pl at f or ms.

( e) The saf et y val ve capaci t y of each boi l er shal l be sucht hat t he saf et y val ve or val ves wi l l di schar ge al l t he st eam



27

t hat can be gener at ed by t he boi l er wi t hout al l owi ng t hepr essur e t o r i se more t han 6 per cent above t he hi ghestpr essur e t o whi ch any val ve i s set , and i n no case t o moret han 6 per cent above t he maxi mum al l owi ng wor ki ng pressur e.

( f ) One or more saf et y val ves on ever y boi l er s hal l be set ator bel ow t he maxi mum al l owabl e worki ng pressur e. Ther emai ni ng val ves may be set wi t hi n a r ange of 3 per cent abovet he maxi mum al l owabl e worki ng pressur e, but t he r ange of set t i ng of al l t he saf et y val ves on a boi l er shal l not exceed10 percent of t he hi ghest pr essur e t o whi ch any val ve i s set .

( g) When boi l er s of di f f erent maxi mum al l owabl e worki ngpr essures wi t h mi ni mum saf et y val ve set t i ngs var yi ng more t hansi x per cent are so connect ed t hat st eam can f l ow t oward t hel ower pr essur e uni t s, t he l at t er shal l be pr ot ect ed byaddi t i onal saf et y val ve capaci t y, i f necessar y, on t he l owerpr essur e si de of t he system. The addi t i onal saf et y val vecapaci t y shal l be based upon t he maxi mum amount of st eam whi chcan f l ow i nt o t he l ower pr essur e syst em.

( h) I n t hose cases wher e t he boi l er i s suppl i ed wi t h f eed- wat erdi r ect l y f r om wat er mai ns wi t hout t he use of f eedi ng apparat us( not t o i ncl ude r et ur n t r aps) , no saf et y val ve shal l be setat a pr essure gr eat er t han 94 per cent of t he l owest pr essureobt ai ned i n t he suppl y mai n f eedi ng t he boi l er .

( i ) The r el i evi ng capaci t y of t he saf et y val ves on any boi l ershal l be checked by one of t he t hr ee f ol l owi ng met hods and,i f f ound t o be i nsuf f i ci ent , addi t i onal val ves shal l bepr ovi ded:

( 1) by maki ng an accumul at i on t est , whi ch consi st s of shut t i ng of f al l ot her st eam di schar ge out l et s f r om t he boi l erand f orci ng t he f i r es t o t he maxi mum. The saf et y val vecapaci t y shal l be suf f i ci ent t o pr event a r i se of pressur e i nexcess of 6 percent of t he maxi mum al l owabl e wor ki ng pr essur e.

Thi s met hod shoul d not be used on a boi l er wi t h a super - heat eror r e- heat er ;

( 2) by measur i ng t he maxi mum amount of f uel t hat can be burnedand comput i ng t he cor r espondi ng evapor at i ve capaci t y ( st eamgener at i ng capaci t y) upon t he basi s of t he heat i ng val ue of t hi s f uel . These comput at i ons shal l be made as out l i ned i nt he Appendi x of t he ASME Code, Sect i on I ;

( 3) by measur i ng t he maxi mum amount of f eed- wat er t hat can be

evapor at ed;When ei t her of t he met hods out l i ned i n ( 2) or ( 3) i s empl oyed,t he sum of t he saf et y val ve capaci t i es shal l be equal t o orgr eat er t han t he maxi mum evaporat i ve capaci t y ( maxi mum st eamgener at i ng capaci t y) of t he boi l er .

EBO- 7 Boi l er Feedi ng

Each boi l er shal l have a f eed suppl y whi ch wi l l per mi t i t t obe f ed at any t i me whi l e under pr essur e.



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A boi l er havi ng more t han 500 sq. f t . of wat er heat i ngsur f ace shal l have at l east t wo sui t abl e means of f eedi ng, atl east one of whi ch shal l be a f eed pump. A sour ce of f eed ata pr essure 6 per cent gr eat er t han t he set pr essur e of t hesaf et y val ve wi t h t he hi ghest set t i ng may be consi dered one of t he means. Boi l er s f i r ed by gaseous, l i qui d, or sol i d f ueli n suspensi on may be equi pped wi t h a si ngl e means of f eedi ngwat er pr ovi ded means are f ur ni shed f or t he shut of f of heati nput pr i or t o t he wat er l evel r eachi ng t he l owest saf e l evel .

The f eed- wat er shal l be i nt r oduced i nt o a boi l er i n such amanner t hat t he wat er wi l l not be di scharged di r ect l y agai nstsur f aces exposed t o gases of hi gh t emperat ur e or t o di r ectr adi at i on f r om the f i r e. For pr essur es of 400 psi or over ,t he f eed- wat er i nl et t hr ough t he dr um shal l be f i t t ed wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educe t heef f ect s of t emper at ur e di f f er ent i al s i n t he shel l or head.

The f eed pi pi ng t o t he boi l er shal l be pr ovi ded wi t h a check

val ve near t he boi l er and a val ve or cock bet ween t he checkval ve and t he boi l er . When t wo or more boi l er s ar e f ed f r om acommon sour ce, t here shal l al so be a val ve on t he branch t oeach boi l er bet ween t he check val ve and t he sour ce of suppl y.Whenever a gl obe val ve i s used on f eed pi pi ng, t he i nl etshal l be under t he di sc of t he val ve.

I n al l cases wher e r et ur ns ar e f ed back t o t he boi l er bygr avi t y, t her e shal l be a check val ve and st op val ve i n eachr et ur n l i ne, t he st op val ve t o be pl aced bet ween t he boi l erand t he check val ve, and bot h shal l be l ocat ed as cl ose t ot he boi l er as i s pr act i cabl e. I t i s r ecommended t hat no st opval ves be pl aced i n t he suppl y and r et ur n pi pe connect i ons of a s i ngl e boi l er i ns t al l at i on.

Wher e de- aer at i ng heat er s ar e not empl oyed, i t i s r ecommendedt hat t he t emper at ure of t he f eed- wat er be not l ess t han 120degr ees Fahr enhei t t o avoi d t he possi bi l i t y of set t i ng upl ocal i zed st r ess. Wher e de- aer at i ng heat er s are empl oyed, i ti s r ecommended t hat t he mi ni mum f eed- wat er t emper at ur e be notl ess t han 215 degr ees Fahr enhei t s o t hat di ssol ved gases maybe t hor oughl y r el eased.

EBO- 8 Wat er Level I ndi cat or s

Each boi l er , except f or ced- f l ow st eam gener ator s wi t h nof i xed st eam and wat er l i ne, and hi gh- t emper ature wat er boi l er s

of t he f or ced ci r cul ati on t ype t hat have no st eam andwat er - l i ne, shal l have at l east one wat er gage gl ass.Boi l ers oper at ed at pr essur es over 400 psi shal l be pr ovi dedwi t h t wo wat er gage gl asses whi ch may be connect ed t o a si ngl ewat er col umn or connect ed di r ect l y t o t he dr um.

Two i ndependent r emot e l evel i ndi cat or s may be pr ovi dedi nst ead of one of t he t wo r equi r ed gage gl asses f or boi l erdr um wat er l evel i ndi cat i on i n t he case of power boi l er s wi t hal l dr um saf et y val ves set at or above 900 psi . When bot h



29

r emot e l evel i ndi cat or s ar e i n r el i abl e oper at i on, t her emai ni ng gage gl ass may be shut of f , but shal l be mai nt ai nedi n ser vi ceabl e condi t i on.

When t he di r ect r eadi ng of gage gl ass wat er l evel i s notr eadi l y vi si bl e t o t he oper at or i n hi s wor ki ng ar ea, t wodependabl e i ndi r ect i ndi cat i ons shal l be pr ovi ded, ei t her byt r ansmi ssi on of t he gage gl ass i mage or by r emot e i ndi cat or s.

The l owest vi si bl e par t of t he wat er gage gl ass shal l be atl east 2 i n. above t he l owest per mi ssi bl e wat er l evel , atwhi ch l evel t here wi l l be no danger of over heat i ng any part of t he boi l er when i n oper at i on at t hat l evel . When r emot e l eveli ndi cat i on i s pr ovi ded f or the oper at or i n l i eu of t he gagegl ass, t he same mi ni mum l evel r ef er ence shal l be cl ear l ymar ked.

Connect i ons f r om t he boi l er t o t he r emot e l evel i ndi cat orshal l be at l east 3/ 4 i nch pi pe si ze t o and i ncl udi ng t hei sol at i on val ve and f r om t her e t o t he r emot e l evel i ndi cat or

at l east 1/ 2 i n. O. D. t ubi ng. These connect i ons shal l becompl et el y i ndependent of ot her connect i ons f or any f unct i onot her t han wat er l evel i ndi cat i on. For pr essur es of 400 psior over , l ower connect i ons t o dr ums shal l be pr ovi ded wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educet emper at ur e di f f er ent i al s i n t he shel l s or heads.

Boi l er s of t he hor i zont al f i r e- t ube t ype shal l be so set t hatwhen t he wat er i s at t he l owest r eadi ng i n t he wat er gagegl ass t her e shal l be at l east 3 i n. of wat er over t he hi ghestpoi nt of t he t ubes, f l ues, or cr own sheet s.

Boi l er s of l ocomot i ves t ype shal l have at l east one wat ergl ass pr ovi ded wi t h t op and bot t om shut of f cocks and l amp,and t wo gage cocks f or boi l er s 36 i n. i n di amet er and under,and t hr ee gage cocks f or boi l er s over 36 i n. i n di amet er .

The l owest gage cock and t he l owest r eadi ng of wat er gl assshal l not be l ess t han 2 i n. above t he hi ghest poi nt of cr ownsheet on boi l er s 36 i n. i n di amet er and under , nor l ess t han3 i n. f or boi l er s over 36 i n. i n di amet er . These ar emi ni mum di mensi ons, and on l ar ger l ocomot i ves and t hoseoperat i ng on st eep gr ades, t he hei ght shoul d be i ncr eased,i f necessar y, t o compensat e f or change of wat er l evel ondescendi ng gr ades.

The bot t om mount i ng f or wat er gl ass and f or wat er col umn i f used must ext end not l ess t han 1- 1/ 2 i n. i nsi de t he boi l erand beyond any obst acl e i mmedi at el y above i t , and t he passaget her ei n must be st r ai ght and hor i zont al .

Tubul ar wat er gl ass es must be equi pped wi t h a pr ot ect i ngshi el d.

Al l connect i ons on t he gage gl ass shal l be not l ess t han 1/ 2i n. pi pe si ze. Each wat er - gage gl ass shal l be f i t t ed wi t h a



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dr ai n cock or val ve havi ng an unr est r i ct ed dr ai n openi ng of not l ess t han 1/ 4 i n. di amet er t o f aci l i t at e cl eani ng. Whent he boi l er operat i ng pr essure exceeds 100 psi t he gl ass shal lbe f ur ni shed wi t h a connect i on t o i nst al l a val ved dr ai n t ot he ash pi t or ot her saf e di schar ge poi nt .

Each wat er gage gl ass shal l be equi pped wi t h a t op and abot t om shut of f val ve of such t hr ough- f l ow const r uct i on as t opr event st oppage by deposi t s of sedi ment s. I f t he l owestval ve i s mor e t han 7 f t . above t he f l oor or pl at f or m f r omwhi ch i t i s oper at ed, t he oper at i ng mechani sm shal l i ndi cat eby i t s posi t i on whet her t he val ve i s open or cl osed. Thepr essur e- t emper at ur e r at i ng shal l be at l east equal t o t hat of t he l owest set pr essure of any saf et y val ve on t he boi l er dr umand t he cor r espondi ng sat ur at ed- st eam t emperat ur e.

St r ai ght - r un gl obe val ves, shal l not be used on suchconnect i on.

Aut omat i c shut of f val ves, i f per mi t t ed t o be used, shal l

conf or m t o t he requi r ement s of Sect i on I of t he ASME Code.EBO- 9 Wat er Col umns

The wat er col umn shal l be so mount ed t hat i t wi l l mai nt ai n i t scor r ect posi t i on r el at i ve t o t he nor mal wat er l i ne underoper ati ng condi t i ons.

The mi ni mum si ze of pi pes connect i ng t he wat er col umn t o aboi l er shal l be 1 i n. For pr essur es of 400 psi or over ,l ower wat er col umn connect i ons t o dr ums shal l be pr ovi ded wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educe t heef f ect of t emper at ur e di f f er ent i al s i n t he shel l s or heads.Wat er gl ass f i t t i ngs or gage cocks may be connect ed di r ect l yt o t he boi l er .

The st eam and wat er connect i ons t o a wat er col umn or a wat ergage gl ass shal l be such t hat t hey ar e r eadi l y accessi bl e f ori nt ernal i nspect i on and cl eani ng. Some accept abl e met hods of meet i ng t hi s r equi r ement ar e by pr ovi di ng a cr oss or f i t t i ngwi t h a back out l et at each r i ght - angl e t ur n t o per mi ti nspect i on and cl eani ng i n bot h di r ect i ons, or by usi ng pi pebends or f i t t i ngs of a t ype whi ch does not l eave an i nt ernalshoul der or pocket i n t he pi pe connect i on and wi t h a r adi us of cur vat ur e whi ch wi l l permi t t he passage of a r ot ary cl eaner .

Scr ewed pl ug cl osur es usi ng t hr eaded connect i ons as al l owed by

Sect i on I of t he ASME Code ar e accept abl e means of access f ort hi s i nspect i on and cl eani ng. For boi l er s wi t h al l dr umsaf et y val ves set at or above 400 psi , socket - wel ded pl ugsmay be used f or t hi s pur pose i n l i eu of scr ewed pl ugs. Thewat er col umn shal l be f i t t ed wi t h a connect i on f or a dr ai ncock or dr ai n val ve t o i nst al l a pi pe of at l east 3/ 4 i n.pi pe si ze t o t he ash pi t or ot her saf e poi nt of di schar ge. I f t he wat er connect i on t o t he wat er col umn has a r i si ng bend orpocket whi ch cannot be drai ned by means of t he wat er - col umndr ai n, an addi t i onal dr ai n shal l be pl aced on t hi s connect i on



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i n order t hat i t may be bl own of f t o cl ear any sedi ment f r omt he pi pe.

The desi gn and mat er i al of a wat er col umn shal l compl y wi t ht he r equi r ement s of Sect i on I of t he ASME Code. Wat er col umnmade of cast i r on i n accor dance wi t h SA- 278 may be used f ormaxi mum boi l er pressur es not exceedi ng 250 psi . Wat er col umnsmade of duct i l e i r on i n accor dance wi t h SA- 395 may be used f ormaxi mum boi l er pr essur e not exceedi ng 350 psi . For hi gherpr essur es, st eel const r uct i on shal l be used.

Shut of f val ves shal l not be used i n t he pi pe connect i onsbet ween a boi l er and a wat er col umn or bet ween a boi l er andt he shut of f val ves r equi r ed f or t he gage gl ass, unl ess t heyar e ei t her out si de- screw- and- yoke or l ever - l i f t i ng t ype gat eval ves or st opcocks wi t h l ever per manent l y f ast ened t heret oand marked i n l i ne wi t h t hei r passage, or of such ot hert hr ough- f l ow const r uct i on as t o pr event st oppage by deposi t sof sedi ment , and t o i ndi cat e by t he posi t i on of t he oper ati ngmechani sm whet her t hey are i n open or cl osed posi t i on; and

such val ves or cocks shal l be l ocked or seal ed open. Wherest op cocks are used, t hey shal l be of a t ype wi t h t he pl ughel d i n pl ace by a guard or gl and.

No out l et connect i ons, except f or cont r ol devi ces ( such asdamper r egul at or s and f eed- wat er r egul at or s) , dr ai ns, st eamgages, or apparat us of such f orm as does not permi t t heescape of an appr eci abl e amount of st eam or wat er t heref r omshal l be pl aced on t he pi pes connect i ng a wat er col umn or gagegl ass to a boi l er .

EBO- 10 Gage Gl ass Connect i ons Gage gl asses and gage cocks t hat ar e not connect ed di r ect l y t oa shel l or dr um of t he boi l er shal l be connect ed by one of t hef ol l owi ng met hods:

( a) The wat er gage gl ass or gl asses and gage cocks shal l beconnect ed t o an i nt er veni ng wat er col umn.

( b) When onl y wat er gage gl asses ar e used, t hey may bemount ed away f r om t he shel l or drum and t he wat er col umnomi t t ed, pr ovi ded t he f ol l owi ng r equi r ement s ar e met :

( c) The t op and bot t om gage gl ass f i t t i ngs ar e al i gned,suppor t ed, and secur ed so as t o mai nt ai n t he al i gnment of t hegage gl ass; and

( d) The st eam and wat er connect i ons are not l ess t han 1 i n.pi pe si ze and each wat er gl ass i s pr ovi ded wi t h a val veddr ai n; and

( e) The st eam and wat er connect i ons compl y wi t h t her equi r ement s of t he f ol l owi ng:

The l ower edge of t he st eam connect i on t o a wat er col umn orgage gl ass i n t he boi l er shal l not be bel ow t he hi ghestvi si bl e wat er l evel i n t he wat er gage gl ass. Ther e shal l be



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no sag or of f set i n t he pi pi ng whi ch wi l l per mi t t heaccumul at i on of wat er ; and

The upper edge of t he wat er connect i on t o a wat er col umn orgage gl ass and t he boi l er shal l not be above t he l owestvi si bl e wat er l evel i n t he gage gl ass. No par t of t hi s pi peconnect i on shal l be above t he poi nt of connect i on at t he wat ercol umn.

Each boi l er ( except t hose not r equi r i ng wat er l eveli ndi cat ors ) shal l have t hr ee or more gage cocks l ocat ed wi t hi nt he vi si bl e l engt h of t he wat er gl ass, except when t he boi l erhas t wo wat er gl asses l ocat ed on t he same hori zont al l i nes.

Boi l er s not over 36 i n. i n di amet er i n whi ch t he heati ngsur f ace does not exceed 100 sq. f t . need have but t wo gagecocks.

The gage cock connect i ons shal l be not l ess t han 1/ 2 i n. pi pes i ze.

EBO- 11 Pr essur e Gages Each boi l er shal l have a pr essur e gage so l ocat ed t hat i t i seasi l y r eadabl e. The pr essur e gage shal l be i nst al l ed so t hati t shal l at al l t i mes i ndi cat e t he pr essur e i n t he boi l er .Each st eam boi l er shal l have t he pr essure gage connect ed t ot he st eam space or t o t he wat er col umn or i t s st eamconnect i on. A val ve or cock shal l be pl aced i n t he gageconnect i on adj acent t o t he gage. An addi t i onal val ve or cockmay be l ocat ed near t he boi l er pr ovi di ng i t i s l ocked orseal ed i n t he open posi t i on. No other shut of f val ves shal l bel ocat ed bet ween t he gage and t he boi l er . The pi pe connect i onshal l be of ampl e si ze and ar r anged so t hat i t may be cl ear edby bl owi ng out . For a st eam boi l er t he gage or connect i onshal l cont ai n a si phon or equi val ent devi ce whi ch wi l l devel opand mai nt ai n a water seal t hat wi l l pr event st eam f r oment er i ng t he gage t ube. Pressur e gage connect i ons shal l besui t abl e f or t he maxi mum al l owabl e worki ng pr essur e andt emper at ure, but i f t he t emper at ure exceeds 406 degreesFahr enhei t , br ass or copper pi pe or t ubi ng shal l not be used.

The connect i ons t o t he boi l er , except t he si phon, i f used,shal l not be l ess t han 1/ 4 i n. i nsi de di amet er st andar d pi pesi ze but wher e st eel or wr ought - i r on pi pe or t ubi ng i s usedt hey shal l not be l ess t han 1/ 2 i n. The mi ni mum si ze of asi phon, i f used, shal l be 1/ 4 i n. i nsi de di amet er . Thedi al of t he pr essure gage shal l be gr aduat ed t o appr oxi mat el ydoubl e t he pr essur e at whi ch t he saf et y val ve i s set , but i n

no case t o l ess t han 1- 1/ 2 t i mes t hi s pr essure.Each f orced- f l ow st eam gener at or wi t h no f i xed st eam and wat erl i ne shal l be equi pped wi t h pr essure gages or ot her pr essuremeasur i ng devi ces l ocat ed as f ol l ows:

( a) At t he boi l er or super - heat er out l et (f ol l owi ng t he l astsect i on whi ch i nvol ves absor pt i on of heat ) , and

( b) At t he boi l er or economi zer i nl et ( pr ecedi ng any sect i on



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whi ch i nvol ves absor pt i on of heat ) , and

( c) Upst r eam of any shut of f val ve whi ch may be used bet weenany t wo sect i ons of t he heat absor bi ng sur f ace.

Each hi gh- t emper at ure wat er boi l er shal l have a t emperat ur egage so l ocat ed and connect ed t hat i t shal l be easi l yr eadabl e. The t emper at ur e gage shal l be i nst al l ed so t hat i tat al l t i mes i ndi cat es t he t emper at ur e i n degr ees Fahr enhei tof t he wat er i n t he boi l er , at or near t he out l et connect i on.

EBO- 12 St op Val ves

Each st eam out l et f r om a boi l er ( except saf et y val ve and wat ercol umn connect i ons) shal l be f i t t ed wi t h a st op val ve l ocat edas cl ose as pr act i cabl e t o t he boi l er .

When a st op val ve i s so l ocat ed t hat wat er can accumul at e,ampl e dr ai ns shal l be pr ovi ded. The dr ai nage shal l be pi pedt o a saf e l ocat i on and shal l not be di scharged on t he t op of

t he boi l er or i t s set t i ng.When boi l er s pr ovi ded wi t h manhol es ar e connect ed t o a commonst eam mai n, t he st eam connect ed f r om each boi l er shal l bef i t t ed wi t h t wo st op val ves havi ng an ampl e f r ee bl ow dr ai nbet ween t hem. The di scharge of t he dr ai n shal l be vi si bl e t ot he oper at or whi l e mani pul at i ng t he val ves and shal l be pi pedcl ear of t he boi l er set t i ng. The st op val ves shal l consi stpr ef er abl y of one aut omat i c non- r et ur n val ve ( set next t o t heboi l er) and a second val ve of t he out si descr ew- and- yoke t ype.

EBO- 13 Bl ow- of f Pi pi ngA bl ow- of f as r equi r ed her ei n i s def i ned as a pi pe connect i onpr ovi ded wi t h val ves l ocat ed i n t he exter nal pi pi ng t hr oughwhi ch t he wat er i n t he boi l er may be bl own out under pressur e,except i ng dr ai ns such as ar e used on wat er col umns, gagegl asses, or pi pi ng t o f eed- wat er r egul at or s, et c. , used f ort he pur pose of det er mi ni ng t he oper at i ng condi t i on of suchequi pment . Pi pi ng connect i ons used pr i mari l y f or cont i nuousoperat i on, such as de- concent r at or s on cont i nuous bl ow- downsyst ems, are not cl assed as bl ow- of f ’ s but t he pi pe connect i onsand al l f i t t i ngs up t o and i ncl udi ng t he f i r st shut of f val veshal l be equal at l east t o t he pr essur e r equi r ement s f or t hel owest set pr essure of any saf et y val ve on t he boi l er dr um andwi t h t he cor r espondi ng sat ur at ed- st eam t emperat ur e.

A sur f ace bl ow- of f shal l not exceed 2- 1/ 2 i n. pi pe si ze, and

t he i nt er nal pi pe and the t er mi nal connect i on f or t he exter nalpi pe, when used, shal l f or m a cont i nuos passage, but wi t hcl ear ance bet ween t hei r ends and ar r anged so t hat t he r emovalof ei t her wi l l not di st ur b t he ot her . A pr oper l y desi gnedst eel bushi ng, si mi l ar t o or t he equi val ent of t hose shown i nFi g. PG- 59. 1 of Sect i on I of t he ASME Code or a f l angedconnect i on shal l be used.

Each boi l er except f or ced- f l ow st eam gener ator s wi t h no f i xedst eam and wat erl i ne and hi gh- t emper at ur e wat er boi l ers shal l



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have a bot t om bl ow- of f out l et i n di r ect connect i on wi t h t hel owest water space pr act i cabl e f or ext er nal pi pi ng conf or mi ngt o PG- 58. 3. 6 of Sect i on I of t he ASME Code.

Al l wat er wal l s and wat er scr eens whi ch do not dr ai n back i nt ot he boi l er , and al l i nt egr al economi zer s, shal l be equi ppedwi t h out l et connect i ons f or a bl ow- of f or dr ai n l i ne andconf or m t o t he r equi r ement s of PG- 58. 3. 7 of t he ASME Code.

Except as per mi t t ed f or mi ni at ur e boi l er s, t he mi ni mum si zeof pi pe and f i t t i ngs shal l be 1 i n. , and t he maxi mum si zeshal l be 2- 1/ 2 i n. , except t hat f or boi l er s wi t h 100 sq. f t .of heat i ng sur f ace or l ess, t he mi ni mum si ze of pi pe andf i t t i ngs may be 3/ 4 i n.

Condensat e r et ur n connect i ons of t he same si ze or l ar ger t hant he si ze her ei n speci f i ed may be used, and t he bl ow- of f may beconnect ed t o t hem. I n such case t he bl ow- of f shal l be sol ocat ed t hat t he connect i on may be compl et el y dr ai ned.

A bot t om bl ow- of f pi pe when exposed t o di r ect f ur nace heatshal l be pr ot ect ed by f i r ebr i ck or ot her heat r esi st i ngmat er i al whi ch i s so ar r anged t hat t he pi pe may be i nspect ed.

An openi ng i n t he boi l er set t i ng f or a bl ow- of f pi pe shal l bearr anged t o pr ovi de f r ee expansi on and cont r act i on.

EBO- 14 Repai r s and Renewal s of Boi l er Fi t t i ngs and Appl i ances

Whenever r epai r s are made t o f i t t i ngs or appl i ances or i tbecomes necessar y t o r epl ace t hem, t he wor k shal l compl y wi t ht he r equi r ement s f or new i nst al l at i ons.

EBO- 15 Condi t i ons Not Covered By These Requi r ement s

Al l cases not speci f i cal l y cover ed by t hese requi r ement s shal lbe t r eat ed as new i nst al l at i ons or may be r ef er r ed t o t heChi ef I nspect or f or i nst r uct i ons concer ni ng t he r equi r ement s.

SECTI ON 2 - HEATI NG BOI LERS

EHB- 1 St andard Boi l ers

The maxi mum al l owabl e wor ki ng pr essur e of st andar d boi l er sshal l i n no case exceed t he pr essure i ndi cat ed by t hemanuf act ur er ' s i dent i f i cat i on st amped or cast on t he boi l er or

on a pl at e secur ed t o i t .EHB- 2 Nonst andard Ri vet ed Boi l ers

The maxi mum al l owabl e wor ki ng pr essur e on t he shel l of anonst andar d r i vet ed heat i ng boi l er shal l be det er mi ned i naccor dance wi t h EBO- 3 of Part I I I , Power Boi l er s, exceptt hat i n no case shal l t he maxi mum al l owabl e worki ng pr essureof a st eam heat i ng boi l er exceed 15 psi , or a hot wat erboi l er exceed 160 psi or 250 degr ees Fahr enhei t t emperat ur e.



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EHB- 3 Nonst andar d Wel ded Boi l er s The maxi mum al l owabl e wor ki ng pr essur e of a nonst andar d st eelor wr ought i r on heat i ng boi l er of wel ded const r uct i on shal lnot exceed 15 psi f or st eam. For ot her t han st eam ser vi ce,t he maxi mum al l owabl e worki ng pr essur e shal l be cal cul at ed i naccor dance wi t h Sect i on I V of t he ASME Code, but i n no caseshal l i t exceed 30 psi .

EHB- 4 Nonst andard Cast I r on Boi l er s

The maxi mum al l owabl e wor ki ng pr essur e of a nonst andar d boi l ercomposed pr i nci pal l y of cast i r on shal l not exceed 15 psi f orst eam ser vi ce of 30 psi f or hot wat er ser vi ce.

The maxi mum al l owabl e wor ki ng pr essur e of a nonst andar d boi l erhavi ng cast i r on shel l or heads and st eel or wr ought i r ont ubes shal l not exceed 15 psi f or st eam ser vi ce of 30 psi f orhot wat er servi ce.

EHB- 5 Pot abl e Wat er Heat er sA pot abl e wat er heat er shal l not be i nst al l ed or used as aheat i ng boi l er .

EHB- 6 Saf et y Val ves ( a) Each st eam boi l er shal l have one or more ASME/ Nat i onalBoar d cer t i f i ed and st amped saf et y val ves of t he spr i ngpop- t ype adj ust ed and seal ed t o di scharge at a pr essure not t oexceed 15 psi . Seal s shal l be at t ached i n a manner t o pr eventt he val ve f r om bei ng t aken apart wi t hout br eaki ng t he seal .

The saf et y val ves shal l be ar r anged so t hat t hey cannot ber eset t o r el i eve at a hi gher pr essur e t han t he maxi mumal l owabl e worki ng pr essure on t he boi l er . A body dr ai nconnect i on bel ow seat l evel shal l be pr ovi ded by t hemanuf act ur er and t hi s dr ai n shal l not be pl ugged dur i ng oraf t er f i el d i nspect i on. For val ves exceedi ng 2 i n. pi pesi ze, t he dr ai n hol e or hol es shal l be t apped not l ess t han3/ 8 i n. pi pe si ze. For val ves l ess t han 2 i n. , t he dr ai nhol e shal l not be l ess t han 1/ 4 i n. i n di amet er .

( b) No saf et y val ve f or a st eam boi l er shal l be smal l er t han1/ 2 i n. No saf et y val ve shal l be l ar ger t han 4- 1/ 2 i n. Thei nl et openi ng shal l have an i nsi de di amet er equal t o, orgr eat er t han, t he seat di amet er .

( c) The mi ni mum r el i evi ng capaci t y of t he val ve or val vesshal l be gover ned by t he capaci t y marki ng on t he boi l er.

( d) The mi ni mum val ve capaci t y i n pounds per hour shal l be t hegreat er of t hat det ermi ned by di vi di ng t he maxi mum BTU out putat t he boi l er nozzl e obt ai ned by t he f i r i ng of any f uel f orwhi ch t he uni t i s i nst al l ed by 1000, or shal l be det er mi nedon t he basi s of t he pounds of st eam generat ed per hour persquar e f oot of boi l er heat i ng sur f ace as gi ven i n Tabl e EHB- 6i n t ext. I n many cases a gr eat er r el i evi ng capaci t y of val vest han t he mi ni mum speci f i ed by t hese r ul es wi l l have t o bepr ovi ded. I n ever y case, t he r equi r ement s shal l be met .



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TABLE EHB- 6

MI NI MUM POUNDS OF STEAM PER HOUR

PER SQUARE FOOT OF HEATI NG SURFACE

Fi r et ube Wat ert ubeBoi l ers Boi l ers

Boi l er Heati ng Sur f ace:Hand Fi r ed 5 6St oker f i r ed 7 8Oi l , gas or pul ver i zed f uelf i r ed 8 10

Wat erwal l Heat i ng Surf ace:Hand f i r ed 8 8St oker f i r ed 10 12Oi l , gas or pul ver i zed f uel

f i r ed 14 16( 1) When a boi l er i s f i r ed onl y by a gas gi vi ng a heat val uenot i n excess of 200 BTU per cu. f t . , t he mi ni mum saf et yval ve or saf et y r el i ef val ve r el i evi ng capaci t y may be basedon the val ue gi ven f or hand- f i r ed boi l er s above.

( 2) The mi ni mum saf et y val ve or saf et y r el i ef val ve r el i evi ngcapaci t y f or el ect r i c boi l er s shal l be 3- 1/ 2 pounds per hourper ki l owat t i nput .

( 3) For heat i ng sur f ace det ermi nat i on see ASME Code Sect i onI V. par agr aph HG- 403.

( e) The saf et y val ve capaci t y f or each st eam boi l er shal l besuch t hat wi t h t he f uel bur ni ng equi pment i nst al l ed, andoperat i ng at maxi mum capaci t y, t he pr essur e cannot r i se moret han 5 psi above t he maxi mum al l owabl e wor ki ng pressur e.

( f ) When oper at i ng condi t i ons are changed, or addi t i onalboi l er heat i ng sur f ace i s i nst al l ed, t he val ve capaci t y shal lbe i ncr eased, i f necessar y, t o meet t he new condi t i ons andbe i n accor dance wi t h EHB- 6( e) i n t ext . When addi t i onalval ves are r equi r ed, t hey may be i nst al l ed on t he out l etpi pi ng pr ovi ded t her e i s no i nt er veni ng val ve.

( g) I f t her e i s any doubt as t o t he capaci t y of t he saf et y

val ve, an accumul at i on t est shal l be r un. ( See ASME Code,Sect i on VI , Recommended Rul es f or Car e and Oper at i on of Heat i ng Boi l er s. )

( h) No val ve of any descri pt i on shal l be pl aced bet ween t hesaf et y val ve and t he boi l er , nor on t he di scharge pi pebet ween t he saf et y val ve and t he at mospher e. THE DI SCHARGEPI PE SHALL BE AT LEAST FULL SI ZE AND BE FI TTED WI TH AN OPENDRAI N TO PREVENT WATER LODGI NG I N THE UPPER PART OF THE SAFETYVALVE OR I N THE DI SCHARGE PI PE. When an el bow i s pl aced on



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t he saf et y val ve di schar ge pi pe, i t shal l be l ocat ed cl ose t ot he saf et y val ve out l et or t he di schar ge pi pe shal l besecur el y anchored and support ed. Al l saf et y val ve di schargesshal l be so l ocat ed or pi ped as not t o endanger per sonsworki ng i n t he area.

EHB- 7 Saf et y Rel i ef Val ve Requi r ement s f or Hot Wat er Heat i ngand Hot Wat er Suppl y Boi l er s

( a) Each hot wat er heat i ng and hot wat er suppl y boi l er shal lhave at l east one ASME/ Nat i onal Boar d st amped and cert i f i edsaf et y r el i ef val ve set t o r el i eve at or bel ow t he maxi mumal l owabl e worki ng pr essure of t he boi l er . Each hot wat ersuppl y boi l er shal l have at l east one ASME/ Nat i onal Boar dst amped and cer t i f i ed saf et y r el i ef val ve of t he aut omat i cr eseat i ng t ype set t o r el i eve at or bel ow maxi mum al l owabl ewor ki ng pr essur e of t he boi l er . Saf et y r el i ef val vesASME/ Nat i onal Boar d st amped and cer t i f i ed as t o capaci t y shal lhave pop act i on when t est ed by st eam. When mor e t han onesaf et y rel i ef val ve i s used on ei t her hot water heat i ng or hot

wat er suppl y boi l er , t he addi t i onal val ve or val ves shal l beASME r at ed and may be set wi t hi n a r ange not t o exceed 6 psiabove t he maxi mum al l owabl e worki ng pr essur e of t he boi l er upt o and i ncl udi ng 60 psi and 5 per cent f or t hose havi ng amaxi mum al l owabl e worki ng pr essur e exceedi ng 60 psi . Saf et yr el i ef val ves shal l be spr i ng l oaded. Saf et y r el i ef val vesshal l be so arr anged t hat t hey cannot be r eset at a hi gherpressur e t han t he maxi mum per mi t t ed by t hi s par agr aph.

( b) No mat er i al s l i abl e t o f ai l due t o det er i or at i on orvul cani zat i on when subj ect t o sat ur at ed st eam t emper at ur ecor r espondi ng t o capaci t y t est pr essure shal l be used f or anypart.

( c) No saf et y r el i ef val ve shal l be smal l er t han 3/ 4 i n. norl ar ger t han 4- 1/ 2 i n. st andar d pi pe si ze, except t hatboi l er s havi ng a heat i nput not gr eat er t han 15, 000 BTU perhour may be equi pped wi t h a saf et y r el i ef val ve of 1/ 2 i n.

st andar d pi pe si ze. The i nl et openi ng shal l have an i nsi dedi amet er appr oxi mat el y equal t o, or gr eat er t han, t he seatdi amet er. I n no case shal l t he mi ni mum openi ng t hr ough anypar t of t he val ve be l ess t han 1/ 4 i n. i n di amet er or i t sequi val ent area.

( d) The r equi r ed st eam r el i evi ng capaci t y, i n pounds per

hour , of t he pr essur e r el i evi ng devi ce or devi ces on a boi l ershal l be t he great er of t hat det er mi ned by di vi di ng t hemaxi mum out put i n BTU at t he boi l er nozzl e obt ai ned by t hef i r i ng of any f uel f or whi ch t he uni t i s i nst al l ed by 1, 000 orshal l be det ermi ned on t he basi s of pounds of st eam generat edper hour per squar e f oot of boi l er heat i ng sur f ace as gi ven i n

Tabl e EHB- 6. I n many cases a gr eat er r el i evi ng capaci t y of val ves wi l l have t o be pr ovi ded t han t he mi ni mum speci f i ed byt hese r ul es. I n ever y case, t he r equi r ement s of EHB- 7 ( f )shal l be met .



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( e) When oper at i ng condi t i ons are changed, or addi t i onalboi l er heat i ng sur f ace i s i nst al l ed, t he val ve capaci t y shal lbe i ncr eased, i f necessar y, t o meet t he new condi t i ons andshal l be i n accor dance wi t h EHB- 7 ( f ) . The addi t i onal val vesr equi r ed, on account of changed condi t i ons, may be i nst al l edon t he out l et pi pi ng pr ovi ded t her e i s no i nt er veni ng val ve.

( f ) Saf et y rel i ef val ve capaci t y f or each boi l er shal l be sucht hat , wi t h t he f uel bur ni ng equi pment i nst al l ed and oper at edat maxi mum capaci t y, t he pressur e cannot r i se more t han 10per cent above t he maxi mum al l owabl e wor ki ng pressur e f orpr essur e. When mor e t han one saf et y r el i ef val ve i s used,t he over pr essure shal l be l i mi t ed t o 10 per cent above t he setpr essure of t he hi ghest set val ve al l owed by EHB- 6( a) i n t ext .

( g) I f t her e i s any doubt as t o t he capaci t y of t he saf et yr el i ef val ve, an accumul at i on t est shal l be r un. ( See ASMECode, Sect i on VI , Recommended Rul es f or Car e and Oper at i onof Heat i ng Boi l er s. )

( h) No val ve of any descri pt i on shal l be pl aced bet ween t hesaf et y r el i ef val ve and t he boi l er , nor on t he di schar ge pi pebet ween t he saf et y r el i ef val ve and t he at mosphere. THEDI SCHARGE PI PE SHALL BE NOT LESS THAN THE DI AMETER OF THESAFETY RELI EF VALVE AND FI TTED WI TH AN OPEN DRAI N TO PREVENTWATER LODGI NG I N THE UPPER PART OF THE SAFETY RELI EF VALVE ORI N THE DI SCHARGE PI PE. When an el bow i s pl aced on t he saf et yr el i ef val ve di schar ge pi pe, i t shal l be l ocat ed cl ose t o t hesaf et y r el i ef val ve out l et or t he di schar ge pi pe shal l besecur el y anchored and suppor t ed. Al l saf et y r el i ef val vedi schar ges shal l be so l ocat ed or pi ped as not t o endangerpers ons wor ki ng i n t he ar ea.

EHB- 8 St eam Gages

Each st eam boi l er shal l have a st eam gage or a compound st eamgage connect ed t o i t s st eam space or t o i t s wat er col umn or t oi t s st eam connect i on. The gage or connect i on shal l cont ai n a

si phon or equi val ent devi ce whi ch wi l l devel op and mai nt ai n awat er seal t hat wi l l pr event st eam f r om ent er i ng t he gaget ube. The connect i on shal l be so ar r anged t hat t he gagecannot be shut of f f r om t he boi l er except by a cock pl aced i nt he pi pe at t he gage and pr ovi ded wi t h a t ee or l ever handl ear r anged t o be par al l el t o t he pi pe i n whi ch i t i s l ocat edwhen t he cock i s open. The connect i ons t o t he boi l er shal l be

not l ess t han 1/ 4 i n. st andard pi pe si ze, but wher e st eel orwr ought i r on pi pe or t ubi ng i s used, t hey shal l be not l esst han 1/ 2 i n. st andar d pi pe si ze. The mi ni mum si ze of asi phon, i f used, shal l be 1/ 4 i n. i n i nsi de di amet er .Fer r ous and nonf er r ous t ubi ng havi ng i nsi de di amet er s at l eastequal t o t hat of st andard pi pe si zes l i st ed above may besubst i t ut ed f or pi pe.

The scal e on t he di al of a st eam boi l er gage shal l begr aduat ed t o not l ess t han 30 psi nor more t han 60 psi . The



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t r avel of t he poi nt er f r om 0 t o 30 psi pr essur e shal l be atl east 3 i n.

EHB- 9 Pr essure or Al t i t ude Gages and Ther momet er s

Each hot wat er boi l er shal l have a pr essur e or al t i t ude gageconnect ed t o i t or t o i t s f l ow connect i on i n such a mannert hat i t cannot be shut of f f r om t he boi l er except by a cockwi t h t ee or l ever handl e, pl aced on t he pi pe near t he gage.

The handl e of t he cock shal l be par al l el t o t he pi pe i n whi chi t i s l ocat ed when t he cock i s open.

The scal e on t he di al of t he pr essur e or al t i t ude gage shal lbe graduat ed appr oxi mat el y t o not l ess t han 1- 1/ 2 nor moret han t hr ee ti mes t he pr essur e at whi ch t he saf et y rel i ef val vei s set .

Pi pi ng or t ubi ng f or pr essur e- or al t i t ude- gage connect i onsshal l be of nonf er r ous met al when smal l er t han 1 i n. pi pes i ze.

Each hot wat er boi l er shal l have a t hermomet er so l ocat ed andconnect ed t hat i t shal l be easi l y r eadabl e when observi ng t hewat er pr essur e or al t i t ude. The t hermomet er shal l be sol ocat ed t hat i t shal l at al l t i mes i ndi cat e t he t emper at ur e i ndegr ees Fahr enhei t of t he water i n t he boi l er at or near t heout l et .

EHB- 10 Wat er Gage Gl ass es

Each st eam boi l er shal l have one or more wat er gage gl assesat t ached t o t he wat er col umn or boi l er by means of val vedf i t t i ngs not l ess t hat 1/ 2 i n. pi pe si ze, wi t h t he l owerf i t t i ng pr ovi ded wi t h a dr ai n val ve of a t ype havi ng anunr est r i ct ed dr ai n openi ng not l ess t han 1/ 4 i n. i n di amet ert o f aci l i t at e cl eani ng. Gage gl ass r epl acement shal l bepossi bl e under pr essur e. Wat er gl ass f i t t i ngs may beat t ached di r ectl y to a boi l er .

Boi l er s havi ng an i nt er nal ver t i cal hei ght of l ess t han 10 i n.may be equi pped wi t h a wat er l evel i ndi cat or of t he Gl assBul l ' s- Eye t ype pr ovi ded t he i ndi cat or i s of suf f i ci ent si zet o show t he wat er at bot h nor mal oper at i ng and l ow wat ercut of f l evel s .

The l owest vi si bl e par t of t he wat er gage gl ass shal l be atl east 1 i n. above t he l owest permi ssi bl e wat er l evel

r ecommended by t he boi l er manuf act urer . Wi t h t he boi l eroper at i ng at t hi s l owest per mi ssi bl e wat er l evel , t her e shal lbe no danger of over heat i ng any part of t he boi l er .

Each boi l er shal l be pr ovi ded at t he t i me of t he manuf act ur ewi t h a per manent marker i ndi cat i ng t he l owest permi ssi bl ewat er l evel . The marker shal l be st amped, et ched, or casti n met al ; or i t shal l be a met al l i c pl at e at t ached by r i vet s,scr ews, or wel di ng; or i t shal l consi st of mat er i al wi t hdocument ed t est s showi ng i t s sui t abi l i t y as a permanent



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mar ki ng f or t he appl i cat i on. Thi s mar ker shal l be vi si bl e atal l t i mes. Wher e t he boi l er i s shi pped wi t h a j acket , t hi smar ker may be l ocat ed on t he j acket .

I n el ect r i c boi l er s of t he submer ged el ect r ode t ype, t hewat er gage shal l be so l ocat ed t o i ndi cat e t he wat er l evel sbot h at st ar t up and under maxi mum st eal l oad condi t i ons asest abl i shed by t he manuf act ur er.

I n el ect r i c boi l er s of t he r esi st ance heat i ng el ement t ype thel owest vi si bl e par t of t he water gage gl ass shal l not be bel owt he t op of t he el ect r i c r esi st ance heat i ng el ement . Eachboi l er of t hi s t ype shal l al so be equi pped wi t h an aut omat i cl ow- wat er el ect r i cal power cut of f so l ocat ed as t oaut omat i cal l y cut of f t he power suppl y bef ore t he surf ace of t he wat er f al l s bel ow t he t op of t he el ect r i cal r esi st anceheat i ng el ement s.

Tubul ar wat er gl ass es on el ect r i c boi l er s havi ng a nor malwat er cont ent not exceedi ng 100 gal . shal l be equi pped wi t h a

pr ot ecti ve shi el d.EHB- 11 St op Val ves

When a st op val ve i s used i n t he suppl y pi pe connect i on of asi ngl e st eam boi l er , t her e shal l be one used i n t he r et ur npi pe connect i on.

St op val ves i n si ngl e hot wat er heat i ng boi l er s shal l bel ocat ed at an accessi bl e poi nt i n t he suppl y and r et ur n pi peconnect i ons as near t he boi l er nozzl e as i s conveni ent andpr act i cabl e, of a si ngl e hot wat er heat i ng boi l eri nst al l at i on t o per mi t dr ai ni ng t he boi l er wi t hout empt yi ngt he syst em.

When t he boi l er i s l ocat ed above t he syst em and can be dr ai nedwi t hout dr ai ni ng t he syst em, st op val ves may be el i mi nat ed.A st op val ve shal l be used i n each suppl y and r et ur n pi peconnect i on of t wo or mor e boi l er s connect ed t o a commonsyst em.

Al l val ves or cocks shal l conf or m wi t h t he appl i cabl e por t i onsof HF- 203 of Sect i on I V of t he ASME Code and may be f er r ous ornonf err ous.

The mi ni mum pr essur e r at i ng of al l val ves or cocks shal l be atl east equal t o t he pr essure st amped upon t he boi l er , and t he

t emper at ur e r ati ng of such val ves or cocks, i ncl udi ng al li nt ernal component s shal l be not l ess t han 250 degr eesFahr enhei t .

Val ves or cocks s hal l be f l anged, t hr eaded or have endssui t abl e f or wel di ng or br azi ng.

Al l val ves or cocks wi t h st ems or spi ndl es shal l haveadj ust abl e pr essur e t ype packi ng gl ands and, i n addi t i on,al l pl ug t ype cocks shal l be equi pped wi t h a guard or gl and.



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The pl ug or ot her operat i ng mechani sm shal l be di st i nct l ymar ked i n l i ne wi t h t he passage t o i ndi cat e whet her i t i sopened or cl osed.

Al l val ves or cocks shal l have t i ght cl osur e when under boi l erhydr ost at i c t est pr essur e.

When st op val ves ar e used, t hey shal l be proper l y desi gnat edsubst ant i al l y by t ags of met al or other dur abl e mat er i alf ast ened t o t hem as f ol l ows:

Suppl y Val ve - Number ( )

Do Not Cl ose Wi t hout Al so Cl osi ng Ret ur n Val ve -Number ( )

Ret ur n Val ve - Number ( )

Do Not Cl ose Wi t hout Al so Cl osi ng Suppl y Val ve -Number ( )

EHB- 12 Feed- wat er Connect i ons

Feed- wat er , makeup wat er, or wat er t r eat ment shal l bei nt r oduced i nt o a boi l er t hr ough t he r et ur n pi pi ng syst em.Al t er nat i vel y, makeup wat er or wat er t r eat ment may bei nt r oduced t hr ough an i ndependent connect i on. The wat er f l owf r om t he i ndependent connect i on shal l not di schar ge di r ect l yagai nst par t s of t he boi l er exposed t o di r ect r adi ant heatf r om t he f i r e. Makeup wat er or wat er t r eat ment shal l not bei nt r oduced t hr ough openi ngs or connect i ons pr ovi ded f ori nspecti on or cl eani ng, saf et y val ve, saf et y r el i ef val ve,bl ow- of f , wat er col umn, wat er gage gl ass, pr essur e gage, ort emper at ur e gage.

The makeup wat er pi pe shal l be pr ovi ded wi t h a check val venear t he boi l er and a st op val ve or cock bet ween t he checkval ve and t he boi l er or bet ween t he check val ve and t he ret ur npi pe sys t em.

EHB- 13 Wat er Col umn and Wat er Level Cont r ol Pi pes

The mi ni mum si ze of f er r ous or nonf er r ous pi pes connect i ng awat er col umn t o a st eam boi l er shal l be 1 i n. No out l etconnect i ons, except f or damper r egul at or, f eed- wat err egul at or, st eam gages, or apparat us whi ch does not permi tt he escape of any st eam or wat er except f or manual l y operat ed

bl ow- downs, shal l be at t ached t o a wat er col umn or t he pi pi ngconnect i ng a wat er col umn t o a boi l er ( see HG- 705 of Sect i onI V of t he ASME Code f or i nt r oduct i on of f eed- wat er i nt o aboi l er ) . I f t he wat er col umn, gage gl ass, l ow- water f uelcut of f , or ot her wat er l evel cont r ol devi ce i s connect ed t ot he boi l er by pi pe and f i t t i ngs, no shut of f val ves of anyt ype shal l be pl aced i n such pi pe, and a cr oss or equi val entf i t t i ng t o whi ch a dr ai n val ve and pi pi ng may be at t achedshal l be pl aced i n t he wat er pi pi ng connect i on at ever y r i ghtangl e t ur n t o f aci l i t ate cl eani ng. The water col umn dr ai n



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pi pe and val ve shal l be not l ess t han 3/ 4 i n. pi pe si ze.

The st eam connect i ons t o t he wat er col umn of a hor i zont alFi r e- t ube wr ought boi l er shal l be t aken f r om t he t op of t heshel l or t he upper part of t he head, and t he wat er connect i onshal l be t aken f r om a poi nt not above t he cent er l i ne of t heshel l . For a cast i r on boi l er , t he st eam connecti on t o t hewat er col umn shal l be t aken f r om t he t op of an end sect i on ort he t op of t he st eam header , and t he wat er connect i on shal lbe made on an end sect i on not l ess t han 6 i n. bel ow t hebot t om connect i on t o t he wat er gage gl ass.

EHB- 14 Ret ur n Pump

Each boi l er equi pped wi t h a condensat e r et ur n pump shal l bepr ovi ded wi t h a wat er l evel cont r ol ar r anged t o aut omat i cal l ymai nt ai n t he water l evel i n t he boi l er wi t hi n t he r ange of t hegage gl ass.

EHB- 15 Repai r s and Renewal s of Fi t t i ngs and Appl i ances

Whenever r epai r s are made t o f i t t i ngs or appl i ances, or i tbecomes necessar y t o r epl ace t hem, t he r epai r s must compl ywi t h Sect i on I V of t he ASME Code f or new const r uct i on.

SECTI ON 3 - PRESSURE VESSELS

EPV- 1 Maxi mum Al l owabl e Worki ng Pr essur e f or St andard Pr essur eVessel s

The maxi mum al l owabl e wor ki ng pr essur e f or st andar d pr essur evessel s shal l be det er mi ned i n accordance wi t h t he appl i cabl epr ovi si ons of t he edi t i on of t he ASME Code or t he API - ASMECode under whi ch t hey wer e const r uct ed and st amped.

EPV- 2 Maxi mum Al l owabl e Wor ki ng Pressur e f or Nonst andar dPressure Vessel s, Except as Provi ded i n EPV- 3

( a) The maxi mum al l owabl e worki ng pr essur e of a nonst andardpr essure vessel shal l be det er mi ned by t he st r engt h of t heweakest cour se comput ed f r om t he t hi ckness of t he pl at e, t het ensi l e st r engt h of t he pl at e, t he ef f i ci ency of t hel ongi t udi nal j oi nt , t he i nsi de di amet er of t he cour se and t hef act or of saf et y set by these r ul es.

TSt E = maxi mum al l owabl e wor ki ng pr essur e, psiDDDDRFS

wher e:

TS = speci f i ed mi ni mum t ensi l e st r engt h of shel l pl at emat er i al , psi . ( When t he t ensi l e st r engt h of car bon st eelpl at e i s not known, i t may be t aken as 55, 000 psi f ort emperat ur es not exceedi ng 650 degr ees Fahr enhei t . For ot hermat er i al s use t he l owest st r ess val ues f or t hat mat er i al f r omSect i on VI I I . )



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t = mi ni mum t hi ckness of shel l pl at e of weakest cour se,i nches

E = ef f i ci ency of l ongi t udi nal j oi nt dependi ng uponconst r uct i on.

Use t he f ol l owi ng val ues:

f or r i vet ed j oi nt s - cal cul at ed r i vet ed ef f i c i ency; f orf usi on- wel ded and br azed j oi nt s - t he f ol l owi ng per cent agesappl y:

PERCENTSi ngl e l ap wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40%

Doubl e l ap wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50%

Si ngl e but t wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60%

Doubl e but t wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70%

For ge wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70% Br azed st eel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80%

R = i nsi de r adi us of weakest cour se of shel l , ( i nches)pr ovi ded t he t hi ckness does not exceed 10 percent of t her adi us. I f t he t hi ckness i s over 10 per cent of the r adi us,t he out er r adi us shal l be used.

FS = f act or of saf et y al l owed by t hese rul es.

( b) The mi ni mum f act or of saf et y i n no case be l ess t han 5 f orexi st i ng i nst al l at i ons. The wor ki ng pr essur e shal l bedecr eased when deemed necessar y by t he i nspect or t o i nsur e t heoper at i on of t he vessel wi t hi n saf e l i mi t s. The condi t i on of t he vessel and t he par t i cul ar ser vi ce t o whi ch i t i s subj ectwi l l be t he det er mi ni ng f act ors.

( c) The maxi mum al l owabl e worki ng pressur e permi t t ed f orf or med heads under pressur e shal l be det ermi ned by usi ng t heappr opr i at e f or mul as f r om ASME Code Sect i on VI I I , Di vi si on 1,and t he t ensi l e st r engt h and f act or s of saf et y gi ven i nparagr aphs EPV- 1 and EPV- 2( a) ( b) .

( d) The maxi mum al l owabl e worki ng pr essur e f or nonst andardpr essur e vessel s subj ect ed t o exter nal pr essur e shal l bedet er mi ned by t he r ul es of Sect i on VI I I , Di vi si on 1, of t he

ASME Code.EPV- 3 Nonst andar d Pr essur e Vessel s - Use of Ot her For mul as

Pr essure vessel s t hat wer e not ASME Code st amped but whi chwere const r uct ed of known mat er i al s and were desi gned andconst r uct ed i n accor dance wi t h sound engi neeri ng st andar ds,f or mul as, and pr act i ces that provi de saf et y equi val ent t o t hei nt ent of t he Code shal l be cal cul at ed on t he same basi s asused i n t he or i gi nal desi gn.



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EPV- 4 I nspect i on of I naccessi bl e Par t s

Wher e, i n t he opi ni on of t he i nspect or , as t he r esul t of condi t i ons di scl osed at t he t i me of i nspect i on, i t may benecessar y t o r emove i nt er i or or ext er i or l i ni ng, cover i ng orbr i ckwork t o expose cer t ai n part s of t he vessel not normal l yvi si bl e, t he owner or user shal l r emove such mat er i al t opermi t pr oper i nspect i on and t o det ermi ne r emai ni ng t hi ckness.

EPV- 5 Over pr essure Pr ot ect i on

Each pr essur e vessel s hal l be pr ovi ded wi t h pr essur e r el i ef devi ces i ndi cat i ng and cont r ol l i ng devi ces as necessar y t opr ot ect agai nst over pr essure. These devi ces shal l be soconst r uct ed, l ocat ed and i nst al l ed t hat t hey cannot r eadi l ybe render ed i noper at i ve. The r el i evi ng capaci t y of suchpr essur e r el i ef devi ce shal l be adequate t o pr event a r i se i npr essur e i n t he vessel of more t han 10 percent or 3 psi ,whi chever i s gr eat er, above t he maxi mum al l owabl e wor ki ng

pr essure except when mul t i pl e r el i evi ng devi ces ar e pr ovi ded,t hey shal l pr event t he pr essur e f r om r i si ng mor e t han 16percent or 4 psi , whi chever i s gr eat er above t he maxi mumal l owabl e worki ng pr essure. When mul t i pl e pr essure r el i evi ngdevi ces are pr ovi ded, at l east one devi ce shal l be set at orbel ow t he maxi mum al l owabl e wor ki ng pressur e and t headdi t i onal devi ces shal l be set no hi gher t hen 105% of t hemaxi mum al l owabl e wor ki ng pressur e. Wher e an addi t i onalhazar d i s i nvol ved due t o f i r e or ot her unexpect ed sour ces of exter nal heat , t he pr essur e r el i ef devi ces shal l meet t her equi r ement s of ASME Code Sect i on VI I I , Di vi si on 1,par agr aph UG- 125 or Di vi si on 2, par agr aph AR- 130, whi cheveri s appl i cabl e.EPV- 6 Repai r s and Renewal s of Fi t t i ngs and Appl i ances

Whenever r epai r s ar e made t o f i t t i ngs and appur t enances or i tbecomes necessar y t o r epl ace t hem, t he wor k must compl y wi t ht he r equi r ement s f or new i nst al l at i ons.

PART I V

GENERAL REQUI REMENTS

GR- 1 I nspect i on of Boi l ers and Pressur e Vessel s

Al l boi l er s and pr essur e vessel s not exempt ed by t he Act or byr ul es and r egul at i ons pr omul gat ed under t he Act and whi ch aresubj ect t o r egul ar i nspect i ons, shal l be pr epar ed f or suchi nspect i ons as r equi r ed i n GR- 2.

GR- 2 Pr epar at i on f or I nspect i on The owner or user shal l pr epare each boi l er or pr essur e vesself or i nspect i on, and shal l pr epar e f or and appl y a hydr ost at i cor pressur e t est , whenever necessar y, on t he dat e ar r angedby t he i nspect or whi ch shal l not be l ess t han seven ( 7) daysaf t er t he dat e of not i f i cat i on.



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( a) Boi l er s - The owner or user shal l pr epar e a boi l er f ori nt er nal i nspect i on i n t he f ol l owi ng manner :

( 1) Wat er shal l be drawn of f and t he boi l er washed t hor oughl y;

( 2) Manhol e and handhol e pl at es, washout pl ugs and i nspect i onpl ugs i n wat er col umn connect i ons shal l be r emoved as r equi r edby t he i nspect or . The f urnace and combust i on chamber s shal lbe cool ed and t hor oughl y cl eaned;

( 3) Al l gr at es of i nt er nal l y f i r ed boi l er s shal l be r emoved;

( 4) I nsul at i on or br i ckwork shal l be r emoved as r equi r ed byt he i nspect or i n or der t o det er mi ne t he condi t i on of t heboi l er , header s, f ur nace, suppor t s or ot her par t s;

( 5) Pr i or t o t he i nspect i on, t he owner / user shal l make anyand al l pr eparat i ons wi t h r egar ds t o asbest os cont ai ni ngmat er i al s whi ch are necessar y t o pr ovi de pr oper access t o

equi pment and t o cont r ol exposur e t o asbest os f i ber s dur i ngt he i nspect i on. The r equi r ed pr eparat or y wor k shal l beconduct ed i n accor dance wi t h t he pr ovi si ons of t he RhodeI sl and Rul es and Regul at i ons f or Asbest os Cont r ol ;

( 6) The pr essure gage shal l be removed f or t est i ng as r equi r edby t he i nspect or;

( 7) Any l eakage of st eam or hot water i nt o t he boi l er shal l bepr event ed by di sconnect i ng t he pi pe or val ve at t he mostconveni ent poi nt or any appropr i at e means approved by t hei nspect or ;

( 8) Bef ore openi ng t he manhol e or handhol e cover s and ent eri ngany par t s of t he st eam generat i ng uni t connect ed t o a commonheader wi t h ot her boi l er s, t he non- r et ur n and st eam st opval ves must be cl osed, t agged, and padl ocked, and drai nval ves or cocks bet ween t he t wo val ves opened. The f eedval ves must be cl osed, t agged, and padl ocked, and drai nval ves or cocks l ocat ed bet ween t he t wo val ves opened. Af t erdr ai ni ng t he boi l er , t he bl ow- of f val ves shal l be cl osed,t agged and padl ocked. Bl ow- of f l i nes, wher e pr act i cabl e,shal l be di sconnect ed bet ween pr essur e part s and val ves. Al ldr ai ns and vent l i nes shal l be opened.

( b) Pr essur e Vessel s - Pr essur e vessel s shal l be pr epar ed f ori nspect i on t o t he ext ent deemed necessar y by t he i nspect or and

t he appl i cabl e pr ocedur es out l i ned i n ( a) above.GR- 3 Boi l ers and Pr essur e Vessel s I mpr oper l y Prepared f or

I nspect i on

I f a boi l er or pr essur e vessel has not been pr oper l y pr epar edf or an i nt er nal i nspecti on, or i f t he owner or user f ai l s t ocompl y wi t h t he r equi r ement s f or a pr essur e t est as set f ort hi n t hese r ul es, t he i nspect or may decl i ne t o make t hei nspecti on or t est and t he i nspecti on cer t i f i cat e shal l be



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wi t hhel d or r i ght t o oper at e r evoked, unt i l t he owner or usercompl i es wi t h t he r equi r ement s.

GR- 4 Removal of Coveri ng t o Permi t I nspect i on

I f t he boi l er or pr essur e vessel i s j acket ed so t hat t hel ongi t udi nal seams of shel l s, dr ums or domes cannot be seen,suf f i c i ent j acket i ng, set t i ng wal l , or ot her f orm of cas i ngor housi ng shal l be r emoved t o permi t r easonabl e i nspect i on of t he seams and ot her areas necessar y t o det ermi ne t he condi t i onand saf et y of the boi l er or pr essur e vessel , pr ovi ded suchi nf or mat i on cannot be det ermi ned by ot her means.

GR- 5 Lap Seam Cr ack

The shel l or dr um of a boi l er or pr essur e vessel , i n whi ch al ap seam crack i s di scover ed al ong a l ongi t udi nal r i vet ed

j oi nt , shal l be i mmedi at el y di scont i nued f r om use. Pat chi ngi s pr ohi bi t ed. ( By l ap seam cr ack i s meant a cr ack f ound i nl ap seams, extendi ng par al l el t o t he l ongi t udi nal j oi nt and

l ocat ed ei t her bet ween or adj acent t o r i vet hol es. )GR- 6 Pressur e Test

A hydr ost at i c pressur e t est , when appl i ed t o boi l er s orpr essur e vessel s, shal l not exceed 1- 1/ 2 t i mes t he maxi mumal l owabl e worki ng pr essur e. The pr essur e shal l be underpr oper cont r ol so t hat i n no case shal l t he r equi r ed t estpressure be exceeded by mor e t han 2 per cent .

Dur i ng a hydr ostat i c t est t he saf et y val ve or val ves shal l ber emoved or each val ve di sc shal l be hel d t o i t s seat by meansof a t est i ng cl amp and not by scr ewi ng down t he compressi onscr ew upon t he spri ng. A pl ug devi ce desi gned f or t hi spur pose may be used.

I t i s suggest ed t hat t he mi ni mum t emperat ur e of t he wat er usedt o appl y a hydr ost ati c t est shal l be not l ess t han 70 degr eesFahr enhei t , but t he maxi mum t emperat ur e dur i ng i nspect i onshal l not exceed 120 degr ees Fahr enhei t .

When a hydr ost at i c t est i s appl i ed t o det er mi ne t i ght ness,t he pr essure shal l be equal t o t he normal oper at i ng pr essurebut need not exceed t he r el ease pressur e of t he saf et y val vehavi ng the l owest r el ease set t i ng.

When t he cont ent s of t he vessel prohi bi t cont ami nat i on by any

ot her medi um or when a hydr ost at i c t est i s not possi bl e,ot her t est i ng medi a may be used pr ovi di ng t he pr ecaut i onaryr equi r ement s of t he appl i cabl e sect i on of t he ASME Code aref ol l owed. I n such cases, t here shal l be agr eement bet weent he owner and t he i nspect or .



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GR- 7 Aut omat i c Low Wat er Fuel Cut of f and/ or Wat er Feedi ngDevi ce

Each aut omat i cal l y f i r ed st eam or vapor syst em boi l er shal l beequi pped wi t h an aut omat i c l ow wat er f uel cut of f so l ocat ed ast o aut omati cal l y cut of f t he f uel suppl y when t he sur f ace of t he wat er f al l s t o t he l owest saf e wat er l i ne. I f a wat erf eedi ng devi ce i s i nst al l ed, i t shal l be so const r uct ed t hatt he wat er i nl et val ve cannot f eed wat er i nt o t he boi l ert hr ough t he f l oat chamber and so l ocat ed as t o suppl yr equi si t e f eed- wat er . The l owest saf e wat er l i ne shoul d not bel ower t han t he l owest vi si bl e par t of t he water gl ass.

Such f uel or f eed- wat er cont r ol devi ce may be at t ached di r ectt o a boi l er or f or l ow pr essur e boi l er s t o t he t apped openi ngspr ovi ded f or at t achi ng a wat er gl ass di r ect t o a boi l er ,pr ovi ded t hat such connect i ons f r om t he boi l er ar e nonf er r oust ees or Y' s not l ess t han 1/ 2 i n, pi pe si ze bet ween t heboi l er and t he water gl ass, so t hat t he water gl ass i sat t ached di r ect and as cl ose as possi bl e t o t he boi l er ; t he

st r ai ght way t appi ng of t he Y or t ee t o t ake t he wat er gl assf i t t i ngs, t he si de out l et of t he Y or t ee t o t ake t he f uelcut of f or wat er f eedi ng devi ce. The ends of al l ni ppl es shal lbe reamed t o f ul l si ze di amet er .

Desi gns embodyi ng a f l oat and f l oat bowl shal l have a ver t i calst r ai ght away val ve dr ai n pi pe at t he l owest poi nt i n t hewat er equal i zi ng pi pe connect i ons by whi ch t he bowl and t heequal i zi ng pi pe can be f l ushed and t he devi ce t est ed.

GR- 8 Pressur e Reduci ng Val ves

Wher e pressur e r educi ng val ves ar e used, one or mor e saf et yor saf et y r el i ef val ves shal l be pr ovi ded on t he l ow pr essur esi de of t he r educi ng val ve when t he pi pi ng or equi pment on t hel ow pr essur e si de does not meet t he r equi r ement s f or t he f ul li ni t i al pr essur e. The saf et y or saf et y r el i ef val ves shal l bel ocat ed adj oi ni ng or as cl ose as possi bl e t o t he r educi ngval ve. Proper pr ot ect i on shal l be pr ovi ded t o pr event i nj ur yor damage caused by t he escapi ng f l ui d f r om t he di schar ge of saf et y or saf et y r el i ef val ves i f vent ed t o t he at mospher e.

The combi ned di schar ge capaci t y of t he saf et y or saf et y r el i ef val ves shal l be such t hat t he pr essur e r at i ng of t he l owerpr essur e pi pi ng or equi pment shal l not be exceeded i n case t her educi ng val ve f ai l s i n t he open posi t i on.

The use of hand cont r ol l ed bypass es ar ound r educi ng val ves i s

per mi ssi bl e. I f a bypass i s used ar ound t he r educt i on val ve,t he saf et y val ve r equi r ed on t he l ow pr essure si de shal l be of suf f i ci ent capaci t y t o r el i eve al l the f l ui d t hat can passt hr ough t he bypass wi t hout over - pr essuri ng t he l ow pr essur esi de.

A pr essur e gage shal l be i nst al l ed on t he l ow pr essure si de of a r educi ng val ve.



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GR- 9 Boi l er Bl ow- of f Equi pment

The bl ow- down f r om a boi l er or boi l er s t hat ent er s a sani t ar ysewer syst em or bl ow- down whi ch i s consi der ed a hazar d t o l i f eor pr oper t y shal l pass t hr ough some f orm of bl ow- of f equi pmentt hat wi l l r educe pr essur e and t emper at ur e as r equi r edher ei naf t er .

The t emperat ur e of t he wat er l eavi ng t he bl ow- of f equi pmentshal l not exceed 150 degr ees Fahr enhei t .

The pr essur e of t he bl ow- down l eavi ng any t ype of bl ow- of f equi pment shal l not exceed 5 psi .

Al l bl ow- of f equi pment shal l be f i t t ed wi t h openi ngs t of aci l i t at e cl eani ng i nspect i on.

Bl ow- of f equi pment shal l conf or m t o t he pr ovi si ons set f or t h i nt he recommended r ul es f or Nat i onal Boar d Boi l er Bl ow- of f Equi pment .

GR- 10 Locat i on of Di scharge Pi pi ng Out l et s

The di schar ge of saf et y val ves, bl ow- of f pi pes and ot herout l et s shal l be l ocat ed and support ed as t o pr event i nj ur y topers onnel .

GR- 11 Suppor t s

Each boi l er and pr essur e vessel shal l be suppor t ed by masonr yor st r uctural suppor t s of suf f i ci ent st r engt h and r i gi di t y t osaf el y suppor t t he boi l er or pr essur e vessel and i t s cont ent s.

Ther e shal l be no excess i ve vi br at i on i n ei t her t he boi l er ,pr essur e vessel or i t s connect i ng pi pi ng.

GR- 12 Boi l er Door Lat ches

A water - t ube boi l er shal l have t he f i r i ng door s of t he i nwar dopeni ng t ype, unl ess such door s ar e pr ovi ded wi t h subst ant i aland ef f ect i ve l at chi ng or f ast eni ng devi ces or ot her wi se soconst r uct ed as t o pr event t hem, when cl osed, f r om bei ngbl own open by pr essur e on t he f urnace si de.

These l at ches or f ast eni ngs shal l be of t he posi t i ve sel f l ocki ng t ype. Fr i cti on cont acts, l at ches, or bol t s actuat edby spri ngs shal l not be used. The f oregoi ng r equi r ement s f orl at ches or f asteni ngs shal l not appl y t o coal openi ngs of

downdr af t or si mi l ar f ur naces.Al l ot her doors, except expl osi on door s, not used i n t hef i r i ng of t he boi l er , may be pr ovi ded wi t h bol t s orf ast eni ngs i n l i eu of sel f l ocki ng l at chi ng devi ces.

Expl osi on door s, i f used and i f l ocat ed i n t he set t i ng wal l swi t hi n 7 f t . of t he f i r i ng f l oor or oper at i ng pl at f or m,shal l be pr ovi ded wi t h subst ant i al def l ect or s t o di ver t t hebl as t .



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GR- 13 Cl earance

When boi l er s ar e r epl aced or new boi l er s ar e i nst al l ed i nei t her exi st i ng or new bui l di ngs, a mi ni mum hei ght of at l east3 f t . shal l be pr ovi ded bet ween t he t op of t he boi l er pr operand t he cei l i ng and at l east 3 f t . bet ween al l si des of t heboi l er and adj acent wal l s or ot her st r uct ur es. Boi l er s andpr essure vessel s havi ng manhol es shal l have 5 f t . cl earancef r om t he manhol e openi ng and any wal l , cei l i ng or pi pi ng t hatwi l l pr event a per son f r om ent er i ng t he boi l er or vessel . Al lboi l ers and pr essur e vessel s shal l be so l ocat ed t hat adequat espace wi l l be pr ovi ded f or t he pr oper oper at i on of t he boi l er sand pr essure vessel s and t hei r appur t enances, f or t hei nspect i on of al l sur f aces, t ubes, wat er - wal l s, economi zer s,pi pi ng, val ves and ot her equi pment , and f or t hei r necessar ymai nt enance and r epai r and repl acement of t ubes.

GR- 14 Ladder s and Runways

When necessar y f or saf et y, t here shal l be a st eel r unway or

pl at f or m of st andar d const r uct i on i nst al l ed across the t ops of adj acent boi l ers or pr essure vessel s or at some ot herconveni ent l evel f or t he pur pose of af f or di ng saf e access.Al l wal kways shal l have at l east t wo means of exi t , each t obe r emot el y l ocat ed f r om t he ot her .

GR- 15 Exi t f r om Boi l er Room Al l boi l er r ooms exceedi ng 500 square f eet f l oor area andcont ai ni ng one or more boi l ers havi ng a f uel bur ni ng capaci t yof 1, 000, 000 BTU, or equi val ent el ect r i cal heat i nput , shal lhave at l east t wo means of exi t . Each exi t shal l be r emot el yl ocat ed f r om t he ot her . Each el evat i on i n such boi l er r oomshal l have t wo means of exi t , each r emot el y l ocat ed f r om t heot her .

GR- 16 Suggest i ons f or Oper at i ons

I t i s suggest ed t hat t he Recommended Rul es f or Car e of PowerBoi l er s, Sect i on VI I and t he Recommended Rul es f or Car e andOper at i on of Heat i ng Boi l er s, Sect i on VI of t he ASME Code,be used as a gui de f or pr oper and saf e oper at i ng pr act i ces.

GR- 17 Ai r and Vent i l at i on Requi r ement s - Combust i on Ai r Suppl yand Vent i l at i on of Boi l er Room

A permanent sour ce of out si de ai r shal l be pr ovi ded f or each

boi l er r oom t o per mi t sat i sf act or y combust i on of t he f uel aswel l as pr oper vent i l ati on of t he boi l er r oom under normaloper ati ng condi t i ons.

( a) The t ot al r equi r ement s of t he bur ner s f or al l f i r edpr essure vessel s i n t he boi l er r oom must be used t o det er mi net he l ouver si zes whet her f i r ed by coal , oi l or gas; however ,t he mi ni mum net f r ee l ouver ed ar ea must not be l ess t han onesquar e f oot . The f ol l owi ng t abl e or f or mul a shal l be used t odet ermi ne t he net l ouver ed ar ea i n squar e f eet :



I NPUT REQUI RED AI R MI N. NET LOUVERED

BTU/ HOUR CU/ FT/ MI N. AREA SQ. FT.500, 000 125 1. 0

1, 000, 000 250 1. 0

2, 000, 000 500 1. 6

3, 000, 000 750 2. 5

4, 000, 000 1, 000 3. 3

5, 000, 000 1, 250 4. 1

6, 000, 000 1, 500 5. 0

7, 000, 000 1, 750 5. 8

8, 000, 000 2, 000 6. 6

9, 000, 000 2, 250 7. 5

10, 000, 000 2, 500 8. 3

( BTU/ 10, 000) x 2. 5 = CFM 500CFM per sq. f t . of net r eq. ar ea

( b) When mechani cal vent i l at i on i s used i n l i eu of paragr aph( a) t he suppl y of combust i on and vent i l at i on ai r t o t he boi l err oom and t he f i r i ng devi ce wi l l not oper at e wi t h t he f an of f .

The vel oci t y of t he ai r t hr ough t he vent i l at i ng f an shal l notexceed 500 f eet per mi nut e and t he t ot al ai r del i ver ed shal lbe equal t o or gr eat er t han shown i n par agr aph ( a) above.

GR- 18 Gas Burner s

For i nst al l at i ons whi ch ar e gas f i r ed, t he bur ner s used shal lconf orm t o t he appl i cabl e r equi r ement s of t he Amer i can GasAssoci at i on or ot her nat i onal l y recogni zed st andar ds.

GR- 19 Condi t i ons Not Cover ed by These Rul es and Regul at i ons

For any condi t i ons not covered by t hese r equi r ement s, t heappl i cabl e pr ovi si ons of t he ASME Code or t he NATI ONAL BOARD

I NSPECTI ON CODE shal l appl y.

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Boiler Inspection Regulations

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