SPECIAL CONDITIONS OF THE CONTRACT (PART...

Tender No. GAIL/LAK/C&P/20055533 /INST/2014-15 [e-Tender Ref No. 8000007702] Tender for: PROCUREMENT OF AGA 3 COMPLIANT METER TUBE FOR CUSTODY TRANSFER METERING APPLICATION AT GAS DISTRIBUTION TERMINAL AT GAIL, LAKWA.

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Section IV SPECIAL CONDITIONS OF THE CONTRACT (PART-B) & TECHNICAL

SPECIFICATION PROJECT DESCRIPTION GAIL (India) Limited is a leading Maharatna Company in India which is dealing in natural Gas Transmission Business and Production of LPG, Liquid Hydrocarbons and Petrochemicals. In the Sibsagar district of Assam, GAIL at Lakwa is receiving Rich Feed gas from M/s ONGCL which is metered at Custody Transfer Point at GGS-1, Lakwa. This Rich gas acts as a feed to LPG Processing Plant, where in initial stripping and Knocking of the liquid/ condensate/ mud etc. from feed gas is done in every stage of Compression & expansion. After stage wise compression and expansion, LPG and Naphtha is recovered from the Feed gas from the LEF and LPG columns. The lean Gas Separated from this process is routed to Gas Distribution Terminal (GDT) at Lakwa, where in, the lean gas is metered at Custody Transfer Point and supplied via pipelines to downstream Customers, M/s ASEB, M/s Lakwa TE and M/s ONGCL – (CPP & GLC). The Custody Transfer point at GDT comprises of dedicated independent single run Orifice Metering system for all the three downstream customers. The sizes of the present meter runs are of 12 inch, 8 inch and 3 inch with pressure class – ANSI 300#. The latest edition of AGA-3 recommendation for Natural Gas Orifice Metering is followed in the available Custody Metering system. Due to change in the organisational setup & process modification upstream of GAIL GDT, i.e. change from GAIL LPG Recovery Plant to BCPL C2+ Recovery Plant, procurement is intended for meeting the installation requirements as per AGA-3 for 12 inch and 3 inch metering tube for customers M/s APGCL & M/s Lakwa TE. SPECIAL CONDITIONS OF CONTRACT:

1. GAIL (India) Limited, at Lakwa Gas Distribution Terminal intends to procure Meter tube assemblies for size 12 inch and 3 inch for its custody metering loop for customers M/s APGCL and M/s Lakwa Tea Estate.

2. The existing space provision for 12 inch & 3 inch meter run is as under:

2.1 12 Inch : 12500 mm (Refer Figure 10) 2.2 3 Inch : 5720 mm (Refer Figure 11)

3. The intended AGA-3 Compliant Meter run for 12 inch and 3 inch shall be as per the

schematic/ drawings specified in Figure 12 & 12a and Figure 13 & 13a. For details refer detailed technical specifications and Bill of Material.

4. Vendor scope includes Design, Engineering, Manufacturing, Inspection, Testing, Transportation, Supervision for Installation & commissioning of complete supplied items.


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5. All pipes shall be marked in accordance with the applicable codes, standards and

specifications. In addition, the purchase order number, the item code & special conditions, if any, like “IBR”, “CRYO”, “NACE”, etc., shall also be marked.

6. Highly skilled, "code qualified" welders shall be deployed for all the fabrication jobs and bidder to furnish the required supporting documents.

7. Special cold drawn seamless tubing or honed pipe shall be in the fabrication of meter

tubes for complying the strict requirements for internal roundness and surface finish (Refer Bill of material, for seamless pipes).

8. Radiography and hydrostatic testing shall be carried out and all test reports shall be

furnished. 9. The painting shall be carried after cleaning the surface by sand blasting to remove all

mill scale, rust, rust scale, paint, oil or foreign particles etc. and maintain the surface finishing as per grade SA 2 1/2, Swedish Standard SIS-055 909.

9.1 Primer Coat – 2 coats of Epoxy zinc chromate each 35 microns (min.) thick. 9.2 Finished Coat – 2 coats of Epoxy high build paint each 100 microns (min.)

thick. 9.3 Total Thickness - 275 Micron (minimum). 9.4 The colour code of pipelines – Golden Yellow.

10. Since the meter tube shall be used in natural gas pipeline network at GAIL Gas dispatch terminal, it shall conform to ANSI/ASME B31.8 & OISD 141.

11. The design, construction, materials, testing of the supplied system shall comply with

the codes and standards mentioned in this technical specification. In particular, the following standards are applicable for the gas metering system:

11.1 ANSI/ASME B 16.5 Pipe Flanges & Flanged Fittings. 11.2 ANSI/ASME B 16.20 Metallic Gaskets for Pipe Flanges. 11.3 B 1.20.1 Pipe Threads General Purpose (Inch) 11.4 B16.34 Valves Flanged, Threaded and Welding End

12. However, in case of any contradiction requirement of AGA 3 shall prevail. 13. The supplied system shall also comply the latest OISD standards and PNGRB

regulations. 14. Flange details of the existing 12” & 3” lies are as under

For 12” Dia. Pipeline Description of flange : Weld Neck RF, Std. ASTM A105 Standard : As per ANSI B 16.5 Size : 300 MM / 12 INCH Schedule : 40 Class : 300 #

For 3” Dia. Description of flange : Weld Neck RF, Std. ASTM A105


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Standard : As per ANSI B 16.5 Size : 80 MM / 3 INCH Schedule : 40 Class : 300 #

15. Unless specified otherwise valves shall confirm to the following standards

15.1 Screwed/ Socket Welded/ Flanged end valves (1 ½” and below) 15.1.1 Ball Valves : BS 5351 (latest) 15.1.2 Plug Valves : BS 5353 (latest) 15.1.3 Globe Valves : BS 5352 (latest) 15.1.4 Gate Valves : API 602 (latest)

15.2 Flanged/ Butt welded end valves (2” and above)

15.2.1 Ball Valves : API 6D 15.2.2 Plug Valves : API 6D 15.2.3 Check Valves : API 6D 15.2.4 Globe Valves : BS 1873 15.2.5 Gate Valves : API 6D

16. The FAT will confirm the compliance of meter tube orifice assembly with the

specifications & API/ AGA standard The purpose of FAT is to check the AGA3 compliance each component as well as entire assembly

17. Bidder will provide 15 days’ notice before commencement of FAT along with FAT

procedure.

18. Non-compliance to any of the specifications mentioned in this Annexure – A, shall result in rejection of Meter tube assembly.

19. Vendor shall appoint FCRI-Fluid Control Research Institute (A Government of India

Society under Ministry of Heavy Industry & PE) - Kanjikode West-678 623 Palakkad Kerala, India, as a TPIA for inspection purpose at their works. Apart from inspection by TPIA, inspection shall also be performed in presence of GAIL’s representative. In case GAIL’s Representative is not able to witness the inspection, bidder shall carry out the inspection through TPIA. However, all test documents shall be provided to GAIL for review and approval.

20. All expenditure towards appointment of FCRI, Palakkad as TPIA shall be in bidder’s

scope.

21. All representatives shall be briefed on details/ description/ operating principles of the project.

22. Bidder shall furnish test report certificates of all the items/brought out items during

FAT.

23. Upon completion of the inspection/examination of various test reports/tests in accordance with the AGA 3, the inspection report shall be prepared results and signed / stamped by all the parties.


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24. Any discrepancies noted during the inspection shall be defined, recorded and

summarized in the Action List Form. Once proper action has been taken on those points, this Action List shall be signed / stamped by Customer/ TPIA duly filled with the results.

25. All expenses towards additional visits/inspections, if any by TPIA (FCRI) shall be in

the bidder’s scope. 26. Bidder to furnish the detail traceability of the measurement/testing instruments used

by them and M/S FCRI for inspection /certification etc.

27. Bidder shall supervise the installation & commissioning of the system.

28. GAIL will provide 15 days’ notice to bidder for supervision of erection & commissioning.

29. GAIL will provide guest house accommodation during erection commissioning

subject to availability on chargeable basis. Present rate is INR 200/day.

30. The item shall be despatched only after acceptance at FAT.

31. PAYMENT TERMS: 95 % against supply. 5% against successful erection commissioning. However if the commissioning said system is delayed due to reasons not attributable to seller, then the balance 5% shall be released within 3 months from the date of complete supply against BG.

32. DELIVERY SCHEDULE: a. For Supply of material: The material shall be delivered at GAIL’s warehouse/

stores within 30 weeks from the date of Purchase Order.

b. For supervision of Installation & Commissioning: within one month from the date of intimation by GAIL for readiness of site. Mobilization period of 15 days will be given

DETAILED TECHNICAL SPECIFICATIONS:

1. The supplied meter tube, orifice fittings & orifice plate shall comply with the latest edition of ANSI/API 2530/AGA 3.

2. If there is any contradiction between this specification and the latest edition of ANSI/API2530/AGA3, then the specification as mentioned in the latest edition of ANSI/API 2530 /AGA 3 shall prevail.

3. METER TUBE: 3.1 In line with the definition of meter tube as specified in AGA-3, Part-2: The

Meter Tube shall consist of an Orifice Fitting with installed Orifice plate, a


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length of straight pipe of same diameter, upstream of the fitting and a corresponding straight length of pipe of same diameter , downstream of the fitting. It shall also consist of a flow conditioner /straightener.

3.2 All Meter Tube assembly with UL1, UL2, DL, Supplied Valves, Orifice fitting, Orifice plates etc. shall be provided with proper tag plates. For Orifice plates, Flow Straightener, conditioner the published bore dia, inlet outlet marking, pressure class, etc. shall be engraved/ stamped on the orifice

3.3 The meter tube along with flow conditioner shall be designed in such a way

that fluid should enter the orifice plate with a fully developed, swirl –free flow profile.

3.4 The upstream section of the meter tube is defined as the length of straight pipe

extending from the upstream face of the orifice plate to the nearest upstream change in cross-sectional area or change in the axis of the pipe centre line.

3.5 There shall be no pipe connection within the specified upstream & downstream

meter tube section other than the pressure taps, temperature probe, flow conditioner ( either flanged or in line), inline meter tube flanges to connect the section of the meter tubes & orifice plate holder/fitting.

3.6 For any downstream flange connection within 0.5 Diameter of the meter tube

or 2 inches, care shall be taken to avoid any protrusion of the gasket into the line.

3.7 Irregularities such as grooves, scoring or ridges resulting from seams, welding

distortion, offsets and the like that affect the inside diameter by more than the tolerance as mentioned below, shall not be permitted.

3.8 Meter tube internal diameter is not limited to published nominal inside pipe

diameters. 3.9 All applicable regulation and piping code must be followed. 3.10 Meter tube diameter shall be arithmetic mean of 4 (minimum no of

measurement) evenly spaced individual measurements taken 1 inch upstream of the upstream face of the orifice plate. Minimum 2 additional measurements shall be taken in two or more planes.

3.10.1 Two nominal diameters away from the upstream face of the orifice.

3.10.2 Another location in the upstream length. 3.11 Similarly for downstream pipe measurement shall be taken at 1ʺ downstream of

the downstream face of the orifice plate. Minimum 2 additional measurements shall be taken at two more planes:

3.11.1 Two nominal diameters away from the upstream face of the orifice.

3.11.2 Another location in the upstream length.


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3.12 All measurement shall be carried out at a reference temperature or corrected to reference temperature of 68 DegF as specified in AGA-3, part 2.

3.13 Linear coefficient of thermal expansion for meter tube material shall be furnished.

3.14 The absolute value of % difference between the mean meter tube diameter

(Dm) and any individual diameter (measured within 1 diameter of meter tube at the upstream side of the orifice plate shall not exceeded 0.25% of mean diameter. Measurement resolution shall nearest to 0.001 inch or better.

3.15 For all measured upstream diameters the difference between maximum &

minimum measured value shall not exceed the 0.5 % of mean diameter.

3.16 For all measured downstream diameters the difference between individual measured value and mean value shall not exceed the 0.5 % of mean diameter.

3.17 The internal roughness measurement should be taken at the same plane of

internal diameter measurements are taken. At least 4 measurements shall be taken. Allowable roughness shall be as follows:

3.17.1 Meter of nominal diameter ≤ 12ʺ 3.17.1.1 ≤ 300 µ inches when β≤0.6. 3.17.1.2 ≤ 250 µinches when β>0.6

3.17.2 Meter of nominal diameter > 12ʺ

3.17.2.1 ≤ 600 µ inches when β≤0.6 3.17.2.2 ≤ 500 µinches when β>0.6

3.18 For the purpose of surface roughness measurement, the ß ratio shall be assumed

to be higher than 0.6. This will allow the future possibility of selecting orifice plates with a higher ß ratio without any additional uncertainty in the flow measurement. Bidder to supply the meter tube with roughness complying for β>0.6. However the minimum meter tube roughness shall not be less than 34µ inches in any case.

3.19 The meter tube /orifice assembly shall be three section type. Refer Figure 7 and AGA 3, part 2

3.19.1 An inlet spool of the minimum length prescribed by the AGA-3

standard.

3.19.2 The second section begins with a concentric flow conditioner meeting the AGA-3 Standard. The outer end of section 2 contains the orifice flange or fitting.


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3.19.3 The third or downstream section shall follow the orifice assembly.

3.20 FLOW CONDITIONER/ FLOW STRAIGHTNER

3.20.1 Uniform Concentric 19-Tube Bundle Flow straightener which meets the construction criteria as stipulated in the latest AGA 3 standard clause may be supplied as a flow conditioner. Please refer Figure 8 and AGA 3, part-2 for details.

3.20.2 If the second section of meter tube begins with a concentric, flange mounted tube bundle meeting the 2000 API 14.3 then a spacer plate of ½" thickness shall be supplied to ease tube removal for inspection.

3.20.3 The minimum length of required meter tube shall be as per the Table 2-8a) or 2-8b) of AGA-3 only for 1998 Uniform Concentric 19-Tube Bundle Flow straightener.

3.20.4 Bidder may supply flow conditioner other than 1998 Uniform Concentric 19-Tube Bundle Flow straightener. However, bidder to furnish the test result /approval for the quoted flow conditioner. The quoted flow conditioner must comply all the requirements/pass all the tests as mentioned in the Appendices C & D of ANSI/API 2530/AGA 3.

3.20.5 Use of other flow conditioner shall be based on technical performance data obtained from the performance test result and approval of the performance the flow conditioner.

3.21 For other flow conditioner, Table 2-8a) or 2-8b) of AGA 3 may not be applicable. The performance test/test data shall confirm the orifice meter diameter ratio (β), meter tube length and the flow conditioner location for which the acceptable performance is obtained.

4. THERMO-WELLS: Thermometer wells shall be located on the downstream side of the orifice and the location shall be as per ANSI/API 2530/AGA 3. Thermo-well shall be located downstream of the orifice at the recommended distance DL (as defined in AGA-3, Part 2) from the orifice plate. Thermo wells shall be designed for full flow and the resulting increased flow velocities,

5. β RATIO: Required β ratio for this shall be decided during detail engineering after placement of order. However, Maximum value of orifice meter diameter ratio (β) shall be as under:

5.1 12” line ≤ 0.65 5.2 3” line ≤ 0.65


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This shall be used for designing the meter tube requirement. And for surface roughness of the meter tube, the ß ratio shall be assumed to be higher than 0.6.

6. The existing line/pipe configuration is as per the attached diagram in Figure 10 & 11. These diagram along with the above furnished meter diameter ratio (β) value shall be used by the bidder for designing the meter tube length requirement/location of flow conditioner and other requirements.

7. ORIFICE FITTINGS: The quoted Orifice Fitting shall be dual-chamber type suitable for natural gas application that reigns as the most widely used means of measurement for natural gas. 7.1 The Orifice Fitting shall meet all requirements and recommendations for

accurate flow measurement of natural gas and shall comply ANSI/API2530/AGA 3 requirements.

7.2 The dual chamber Orifice Fitting is an orifice plate holding device. It shall be able to house, and accurately position, an orifice plate within a pipe or tube to measure fluid flow.

7.3 The Dual chamber Orifice Fitting shall be supplied with operating manual and

soft parts as commissioning spares, with all standard accessories, levers for operating the dual orifice chamber.

7.4 The dual chamber Orifice Fitting (Senior) shall be designed to position an

orifice plate, concentric to flow moving through a line, within API MPMS Chapter 14.3, Part 2 (AGA-3) or ISO 5167 installation requirements.

7.5 The dual chamber Orifice Fitting shall allow personnel to remove and replace

an orifice plate without disturbing flow measurement system piping and with little, or no, interruption in service.

7.6 The first chamber or Body of the orifice fittings shall properly position the

orifice plate in the flow stream. The second chamber or top of the fittings shall be a temporary holding place for the orifice plate during removal.

8 Bidder shall provide radiography and hydrostatic testing reports for meter tube &

orifice fittings. Bidder shall furnish Micrometre and internal surface roughness readings with each meter tube.

9 ORIFICE PLATE: 9.1 The Orifice plate shall be square edge concentric.

9.2 Orifice plate dimensions shall be corrected to/ provided at reference

temperature, as specified in AGA-3, Part 2 at 68 DegF 9.3 Linear coefficient of thermal expansion for orifice plate material shall be

furnished.


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9.4 Both faces of the orifice plate shall be flat. Maximum 1% deviation of dam height is allowable in non-flowing condition. The Dam height can be calculated from the formula (Dm-dm)/2. Figure 3, 4 & 5 of this Annexure –A shall be referred.

9.5 Surface roughness of the both faces of the orifice plate shall have no

aberration or scratches visible naked eye that exceed 50 µ inches. 9.6 The upstream edge of the orifice shall be square and sharp. And it shall

comply the AGA-3 norms. 9.7 The inside surface of the orifice plate bore shall be in the form of a constant

diameter cylinder without any defect such as ridges, grooves, pits or lumps visible to naked eye. The length of the cylinder is the orifice plate bore thickness (e). The minimum allowable orifice plate bore thickness is defined by e ≥ 0.01d or e>0.005 inch whichever is larger. The maximum allowable value for the orifice plate bore thickness ID defined by e ≤0.02D or e ≤ 0.125 whichever is smaller. However, “shall not be greater than the maximum allowable orifice plate thickness (E).


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9.8 The recommended thickness of the orifice plate (SS 304/316) and its

maximum /minimum limit shall be as per the AGA 3 tables as appended.


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9.9 The measured orifice bore diameter ( dm) shall be the mean diameter of four or more evenly spaced diameter measurement at the inner edge .None of the four


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or more diameter measurement shall vary from the mean value by more than the tolerance given in the below table.

9.10 The plate bevel angle (θ) is defined as the angle between the bevel and the downstream face of the plate. The allowable value for the plate bevel angle θ is 45°±15° (Figure-1).

9.11 Orifice plate bore must be concentric with both the upstream and the

downstream inside bore of the orifice plate holder. Any eccentricity shall be within the following tolerance

9.11.1 Eccentricity parallel to the axis of the differential pressure taps (€x) .

For any eccentricity in the x-y plane shown the Figure 2 , the component of orifice plate bore eccentricity parallel to the axis of the differential pressure taps, shall be less than or equal to the tolerance defined by the following equation:

0.0025Dm

€x ≤ ---------------------------- 0.1+2.3βm

4

€x= (X-X`)/2 as shown in the Fig 2

9.11.2 Eccentricity perpendicular to the axis of the differential pressure taps

(€y). For any eccentricity in the x-y plane shown the Figure 2 , the component of orifice plate bore eccentricity perpendicular to the axis of the differential pressure taps – measurement (Y-Y`)/2 in Figure-2 may be four times the value calculated for €x above.

9.12 The orifice plate holder shall maintain the plane of the plate at an angel of 90° to the meter tube axis.


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9.13 Dowel pin alignment system shall be available, close tolerance in alignment

for all the sections. 9.14 The orifice fittings shall be tested for bypass checks as per AGA3. 9.15 The office fittings shall comply the AGA 3 requirement while attached with

the pipe. 9.16 The orifice flange associated flanged pressure tap, shall comply the all AGA3

requirements like orifice flange, pressure tap diameter/location/drilling/edges. Refer Figure 6: Allowable variation in Pressure tap-hole location and AGA 3, part 2 for details.

9.17 All the pressure taps shall be equipped with full bore valves for isolation.

10 RESISTANCE TEMPERATURE DETECTOR: 10.1 GENERAL

10.1.1 Type: Class RTD Class AA as per OIML R84 10.1.2 Assembly as per Drawing: Refer FIG 9

10.2 Element:

10.2.1 No. of elements: Duplex 10.2.2 Calibration: IEC 60751-2 10.2.3 Element material: Platinum (PT100) 10.2.4 Resistance at 0 (zero) degc: 100 Ω 10.2.5 Leads: Standard 10.2.6 OD: 8 mm 10.2.7 Material: SS 316 10.2.8 Nipple & union material: SS 316 10.2.9 No. of Wires per element: 4-wire

10.3 HEAD:

10.3.1 Head Cover Type: Screwed cap & SS Chain 10.3.2 Material: Cast Aluminium 10.3.3 Cable Entry: 1/2” NPTF 10.3.4 No. of entries: Single 10.3.5 Enclosure Type: Weather proof to IP65

10.4 THERMO-WELL

10.4.1 Material: SS 316 10.4.2 Construction: Drilled bar stock 10.4.3 Process Connection: 1.5” Flanged 10.4.4 Instrument Connection: ½” NPTF 10.4.5 Thermo well as per Drawing: Refer FIG 9


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DRAWINGS REFERED IN TECHNICAL SPECIFICATIONS

FIGURE -1


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FIGURE -2

FIG -3


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FIG -4

FIG -5


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FIG -6

FIG -7


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FIGURE 8


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RTD Assembly with Thermo well FIGURE 9


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EXISTING LAYOUT OF 12 INCH METERING LOOP OF M/s APGCL

FIGURE 10: Existing schematic Layout with space provision for Meter run of APGCL. Total space provision is 7500 mm + 2500 mm+ 4130 mm = 14130 mm

Flange to flange 10000 mm


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EXISTING LAYOUT OF 3 INCH METERING LOOP OF M/s LAKWA TEA ESTATE

FIGURE 11: Existing schematic Layout with space provision for Meter run of Lakwa TE. Total space provision is 495 mm + 2740 mm+ 2485 mm = 5720 mm


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Figure 12: Required configuration of 3” Meter run (Pls note tapping for thermo wells, Tapping for Pressure gauges, dual isolation vent valves, Pressure gauges, goose nose for vents which is part of the Bill of Material has not been displayed. However, this material will have to be supplied)


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Figure 12a: The schematic of the proposed 12 Inch Meter tube assembly with scope of supply is given in the layout above. However, Bidder may visit the site during pre-bid to get a better idea of the requirement

Figure 13: Required configuration of 3” Meter run (Pls note tapping for thermo well, tapping for Pressure gauges, dual isolation vent valves, Pressure gauges, goose nose for vents which is part of the Bill of Material has not been displayed. However, this material will have to be supplied)


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Figure 13a: The schematic of the proposed 3 Inch Meter tube assembly with scope of supply is given in the layout above. However, Bidder may visit the site during pre-bid to get a better idea of the requirement


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Three section Meter Tube Assembly (with pressure rating: ANSI 300#) will comprise of: UL (UL1+ UL2) & DL with 19-tube flow straightener/ profiler/ flow conditioner along with dual chamber orifice fittings with Orifice Plate as a minimum. Please refer Figure 7 and AGA-3, part 2 for other details. The proposed schematic of Meter tube assembly has been provided in Figure 12 and Figure 13. Any material that may be required for the meter assembly, not mentioned in the specification or the bill of material but necessary for successful commissioning/ installation of the Meter run assembly shall be included in the supply and shall be in the scope of the bidder. An indicative bill of material is as under:

SNo Indicative Bill of Material Unit Quantity 1 12 inch meter tube Assembly as referred in Para A above SET 01 2 3 inch Meter tube assembly as referred in Para A above SET 01 3 Inlet and outlet Isolation Ball Valves for 12 inch: Gear Operated full

bore Ball Valves (ball valves shall provision for seat leak test, drain point, with double isolation)

EA 02

4 Inlet and outlet Isolation Ball Valves for 3 Inch: Lever operated Full Bore Ball Valves ((ball valves shall provision for seat leak test, drain point, with double isolation)

EA 02

5 Thermo wells for installation of RTD, Temperature Gauge; Size 1.5 Inch (two for 12 inch and two thermo wells for 3 inch)

EA 04

6 Tapping for installation of Thermo wells, Pressure Gauge, Vent lines after specified minimum DL as mentioned in AGA-3, part 2

a. Thermo-wells size: 1.5 Inch, Quantity two per meter run b. Pressure Gauge Tapping: ½ inch, Quantity one per meter run c. Vent Tap: 2 Inch, Quantity one per meter run

One set each for 12 inch and 3 inch meter run. Refer Figure 12 and Figure 13.

SET

02

7 Set of 1/2” Full bore Threaded SS Root ball valves for connecting ½” HP and LP tubing. One set each for 12 inch and 3 inch meter run.

SET 02

8 Mandatory spares for dual chamber orifice holder/ fittings. One set each for 12 inch and 3 inch meter run.

SET 02

9 Spare concentric square edge Orifice. One each for 12 inch and 3 inch meter run

EA 02

10 Blinds for Thermo-wells taps, Pressure taps, Vent taps during transit. One set each for 12 inch and 3 inch meter run.

SET 02

11 ½ inch Isolation valves for installation of Pressure Gauges. One each for 12 inch and 3 inch meter run

EA 02

12 1.5 Inch dual isolation valves for vent lines of 12 inch and 3 inch meter runs.

1. One 1.5 inch full bore lever operated Ball valve 2. One 1.5 inch Plug valve, lever operated

One set each for 12 inch and 3 inch meter run.

SET 02

13 Vent line. Vent line shall be as per OISD guidelines. One each for 12 inch and 3 inch meter run.

EA 02


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SNo Indicative Description of materials wherever will be used during fabrication of the meter tube assembly shall meet/

supersede the following as a minimum

Material (MOC)

1 Seamless Pipe conforming to ANSI B 36.10 SA 106 Gr B 2 Unequal TEE B.W, conforming to B 16.9 SA 234 Gr. WPB 3 Sockolet, conforming to MSS SP 97 SA 105 4 Weldolet, MSS SP-97 SA 105 5 Flange WNRF, 125 AARH B16.5 SA 105 6 Flow profiler/ Flow Straightener, conforming to AGA-3, part 2

(Where applicable Certificate of Conformity as stated in AGA-3 will be provided)

SS 316

7 Dual chamber Orifice Fitting – Flange Nek SA 216 Gr WCB 8 Spiral Wound Gasket conforming to ASME B16.20 Spiral Wound SS 316 +

Graph oil filler with CS outer ring

9 Root isolation Ball Valves, ½ INCH, conforming to BS 5351 SS 316 (Swagelok, Parker, Sandvik)

10 Concentric square edge Orifice Plate for dual chamber orifice fitting & one spare, conforming to AGA 3, part 2

SS 316

11 Main header Ball Valves (inlet and outlet), conforming to API 6D

As per API 6D and ASME B 31.8

12 FT Stud with 2 nuts (Heavy Hex) SA 193 Gr B7M SA 194 Gr 2HM

13 High Pressure SS tubes, plugs and Fittings (Swagelok, Parker, Sandvik)

ASTM A 269

14 Pressure Gauges, conforming to BS-EN-837 BS-EN-837-1 BS-EN-837-2


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The Supplied Material shall comply with the following applicable Codes/ Standard, if not specifically mentioned elsewhere in the specification. However, in case of any conflict, guidelines of AGA-3 shall prevail and shall be followed during fabrication of the meter tube assembly

Standards Description AGA-3 1. Part 1: General Equations and Uncertainty

Guidelines 2. Part 2: Specification and Installation Requirements 3. Part 3: Natural Gas Applications 4. Part 4: Background, Development, Implementation

Procedure, and Subroutine Documentation for Empirical Flange-Tapped Discharge Coefficient Equation

API 6D Specifications for Pipeline Valves ASME B16.34 Valves Flanged, Threaded and Welding End BS 5351 Specification for steel ball valves for the petroleum,

petrochemical and allied industries – small floating ball valves

ASME B16.5 Steel pipe flanges and flanged fittings – size upto 24” NB

ASME B16.36 Orifice flanges MSS SP-44 Steel Pipeline flanges ASME B16.9 Factory made Wrought Steel Butt Welding Fittings MSS SP-75 Specification for High Test, Wrought, Butt Welding

Fittings MSS SP 97 Integrally reinforced Forged Branch Outlet Fittings-

Socket Welding, Threaded and Butt Welding ASTM A 194 Standard Specification for Carbon and Alloy Stel

Nuts for Bolts for High Pressure High Temperature Services or Both

ASTM A 193 Standard Specification for Alloy-Steel and Stainless Steel Bolting materials for High Temperature or High Pressure Service and Other Special Purpose Applications

ASME B18.2.1 Square and Hex Bolts and Screws, Inch series ASME B18.2.2 Square and Hex Nuts ASME B16.20 Metallic Gaskets for Pipeline Flanges: Ring Joint,

Spiral Wind and Jacketed ASTM A 269 Valves Flanged, Threaded and Welding End BS-EN-837-1 Pressure Gauges – Part 1: Bourdon Tube Pressure

gauges; Dimensions, metrology requirements and testing

BS-EN-837-2 Pressure Gauges – Part 2: Selection and Installation Recommendations for Pressure Gauges


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OPERATING PARAMETERS A. 12 Inch Meter Tube Assembly

Line Pressure (Barg) 4.0 to 11.0 Line Temperature (Degc) 15.0 to 35.0 Ambient Temperature (Degc) 4.0 to 45.0 Flow SCMH 13000 to 26000 Specific Gravity 0.6 to 0.75 Application 1. Natural Gas – Dry (During Normal Operation of

U/s Recovery Plant) 2. Natural Gas – Wet (During plant bypass condition)

B. 3 Inch meter Tube Assembly Line Pressure (Barg) 6.0 to 11.0 Line Temperature (Degc) 15.0 to 35.0 Ambient Temperature (Degc) 4.0 to 45.0 Flow SCMH 125 to 500 Specific Gravity 0.6 to 0.75 Application 1. Natural Gas – Dry (During Normal Operation of

U/s Recovery Plant) 2. Natural Gas – Wet (During plant bypass condition)

Average Gas Composition S No.

Components Mole Percentage composition for Normal Operation of U/s Recovery Plant (Dry)

(A)

Mole Percentage composition for Bypass Condition of U/s Recovery Plant, (Wet Gas)

(B)

Mole Percentage composition for Future Gas Composition (dry)*

(C) 1 C1: Methane 86.99 81.92 97.00 2 C2: Ethane 7.53 7.31 1.25 3 C3: Propane 1.95 4.83 0.50 4 i-C4: Iso-Butane 0.19 1.21 0.30 5 n-C4: n-Butane 0.15 1.46 0.31 6 i-C5: Iso-Pentane 0.39 0.52 0.21 7 n-C5: n-Pentane 0.30 0.32 0.01 8 C6+: Hexane plus 0.18 0.25 0.03 9 CO2: Carbon Di oxide 2.07 1.96 0.20 10 N2: Nitrogen 0.25 0.22 0.30 Note: Once the present U/s LPG Recovery Plant changes to C2+ Recovery Plant, the composition as per column (A) will be primarily C1 (Methane) w/o CO2 (carbon Di Oxide) during normal operation. However during bypass condition, Composition as per column (B) will flow. Hence material selection


P a g e | 32


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DATASHEETS FOR BALL VALVES (2 INCH and ABOVE) UNIT

S Gas Flow

MMSCMD Liquid Flow

m3/hr Steam Flow

Kg/hr Pressure Kg/cm2g Temperature Degc Level/ Length

mm

1 Valve Manufacturer As per approved Vendor List * 2 Size

(NB) Rating ANSI 300# Standard API 6D

3 Service Natural Gas 4 Purchaser Specification GAIL – TS- Ball Valve 5 Design Pressure ** Design Temperature -28.0 to + 65.0 6 Operating Pressure 4.0 to 12.0 Operating temperature 15.0 to 35.0 7 Corrosion Allowance 1.5 mm 8 Location Under Ground/ Above Ground Above Ground 9 Valve Type (Floating or Trunion/

Pivot Mounted) Floating Ball Bore (Full/ Reduced) Full Bore

10 End Connections Flanged (As per ASME B 16.5) 11 Flanges wherever applicable RF – Serrated/ FF - Smooth, 125 AARH 12 Connecting Pipe Specification Not applicable 13 Locking Arrangement Lock Open Lock Close X Not Applicable 14 Stem Extension Requirement YES NO X 15 Length of Stem Extension (in metres) Not Applicable 16 Gear Operator Required YES (FOR VALVE SIZE >4

INCH) NO (For Less than 4 Inch valves)

17 Valve material Specification Part Specified Material Material Offered (Equivalent or Superior)

(a) Body ASTM A216 Gr. WCB/ A234 Gr. WPB/ A350 Gr. LF2/ A352 Gr. LCB

(b) Ball (ASTM A216 Gr. WCB/ A234 Gr. WPB/A395)+ 75 microns ENP/ AISI 410

(c) Body Seat Ring PTFE/RPTFE/DERLIN (d) Seat Seal N.A


P a g e | 34

(e) Stem AISI 4140 + 75 microns ENP/ AISI 410 (f) Stem Seals VITON/PTFE/Grafoil (g) Stud Bolts / Nuts ASTM A193 Gr. B7 / A194 Gr. 2H 18 Fire Resistant Design Requirement Type Test as per standard API 607 / BS 6755 (Part – II) 19 Valve Testing Requirement

Hydrostatic Test Test Pressure (min) Kg/cm2 (g) Min Duration , minutes

Body ** 2 Seat ** 2

Air Test 7 15 20 Anti-Static Testing Requirement As per Standard API 6D (2002 Ed.)/ BS: 5351 21

Valve Painting Specification (Refer SCC) Suitable for Environment Type Tropical Hot & Humid, Highly rainy Environment

22 Manufacturer’s Paint Spec No. Manufacturer to Furnish “*” By vendor; “**” From Process Data Notes:

1. This valve data sheet shall be read in conjunction with Purchaser’s Technical Specification 2. Inspection & Testing shall be as per this data sheet, purchaser’s T.S, API 6D and other relevant standards 3. Stops shall be provided for positive alignment of Ball with ports and ensure proper installation of handle 4. Short Pattern valves are not acceptable 5. All the Valves above 2” shall have equalizing arrangement with double block valves. However, the equalization line shall be such that it

does not contradict with the installation requirement specified in AGA – 3, Part 2, i.e. the Equalization line tapping for the Upstream Isolation Valve ahead of the meter tube shall be after the specified UL (UL1 + UL2) in AGA-3, Part 2. Where UL- Meter tube length upstream of the orifice plate in multiples of published internal pipe diameters (Refer Figure – 7). Similarly for the downstream isolation valve, the equalization line tapping for the isolation valves shall be after specified DL and the required Pressure tapping, thermo wells, Vent lines etc. Where as per AGA-3, Part 2, DL is - Meter tube length downstream of orifice plate in multiples of published internal pipe diameters.

6. Ball Valves Greater than 2 inch shall be having provision for performing seat leak test with dual isolation Block and bleed valves as per API 6D


P a g e | 35

DATASHEETS FOR BALL VALVES (0.5 INCH to 1.5 INCH) UNIT

S Gas Flow

MMSCMD Liquid Flow m3/hr Steam Flow


mm


(NB) ½”, ¾”, 1” , 1.5”

Rating ANSI 300# Standard BS 5351

3 Service Natural Gas 4 Purchaser Specification ‘------------------------------ 5 Design Pressure ** Design Temperature -28.0 to + 65.0 6 Operating Pressure 4.0 to 12.0 Operating temperature 15.0 to 35.0 7 Corrosion Allowance 1.5 mm 8 Location Under Ground/ Above Ground Above Ground 9 Valve Type (Floating or Trunion/

Pivot Mounted) Floating Ball Bore (Full/ Reduced) Full Bore

10

End Connections

Flanged (As per ASME B 16.5) Socket Weld both ends (As per

ASME B16.11) 100 mm Extension Pups in ASTM A106 Gr. B (Sch.40) at both ends

Flanged One end socket weld other end

11 Flanges wherever applicable RF – Serrated/ FF - Smooth, 125 AARH 12 Connecting Pipe Specification (a) Material SA 106 Gr B, conforming to ANSI B36.10 (b) Diameter -------------------- (c) Thickness -------------------- 13 Locking Arrangement Lock Open Lock Close X Not Applicable 14 Stem Extension Requirement YES NO X


P a g e | 36

15 Length of Stem Extension (in metres) Not Applicable 16 Gear Operator Required NO 17 Valve material Specification Part Specified Material Material Offered (Equivalent or Superior)

(a) Body ASTM A105 (b) Ball 13% Cr Steel (c) Body Seat PTFE (d) Gland 13% Cr Steel (e) Stem 13% Cr Steel (No Casting) (f) Body Seal Grafoil (g) Stem Seal Grafoil (h) Stud Bolts / Nuts ASTM A193 Gr. B7 / A194 Gr. 2H 18 Fire Resistant Design Requirement Type Test as per standard API 607 / BS 6755 (Part – II) 19 Valve Testing Requirement


Body 72 2 Seat 49 2

Air Test 7.0 15 20 Anti-Static Testing Requirement As per Standard API 6D (2002 Ed.)/ BS: 5351 21


22 Manufacturer’s Paint Spec No. Manufacturer to Furnish “*” – By vendor; “**” – From Process Data

Note:

1. Painting of valves shall be as per manufacturer’s standard 2. Material test certificates and hydrostatic test reports shall be furnished prior to despatch 3. Detailed dimensional drawings showing cross-section with part numbers and materials shall be submitted for purchaser’s approval prior to

manufacture of the valves 4. All tests shall be as per BS: 6755 (part-I)


P a g e | 37

5. Valve shall have ball position indicator. 6. Stops shall be provided to ensure positive alignment of ball with ports and ensure proper installation of handle 7. Inspection and testing shall be as per this specification, BS: 6755 (part-I) and other relevant standards. 8. Gland packing assembly shall permit repair of gland packing under full pressure.

DATASHEETS FOR LEVER OPERATED PLUG VALVES (0.5 INCH to 1.5 INCH) UNIT

S Gas Flow

MMSCMD Liquid Flow m3/hr Steam Flow


mm


(NB) ½”, ¾”, 1” , 1.5”

Rating ANSI 300# Standard BS 5353

3 Service Natural Gas 4 Purchaser Specification ‘------------------------------ 5 Design Pressure ** Design Temperature -28.0 to + 65.0 6 Operating Pressure 4.0 to 12.0 Operating temperature 15.0 to 35.0 7 Corrosion Allowance 1.5 mm 8 Location Under Ground/ Above Ground Above Ground 9 Pattern (Short/ Regular/ Venturi) Regular 10

End Connections

Flanged Socket Weld both ends (As per ASME

B16.11) Socket Weld 300#

Flanged One end socket weld other end 11 Flanges wherever applicable RF Serrated

FF Smooth, 125 AARH RTJ Not applicable

12 Connecting Pipe Specification (a) Material SA 106 Gr B, conforming to ANSI B36.10 (b) Diameter -------------------- (c) Thickness --------------------


P a g e | 38

13 Locking Arrangement Lock Open Lock Close X Not Applicable 14 Stem Extension Requirement YES NO X 15 Length of Stem Extension (in metres) Not Applicable 16 Gear Operator Required NO X 17 Valve material Specification Part Specified Material Material Offered (Equivalent or Superior)

(a) Body ASTM A105 (b) Plug (Lubricated) ASTM A 105 + 75 micron ENP (c) Bung (Screwed) ASTM A 105 (d) Stem (No Casting) AISI 410 (e) Gland ASTM A 105 (f) Gland Packing GRAPHITE/ PTFE (g) Gasket N.A (h) Body Stud Bolts / Nuts N.A. 18 Fire Resistant Design Requirement Type Test as per standard API 607 / BS 6755 (Part – II) 19 Valve Testing Requirement


Body 72 2 Seat 49 2

Air Test 7.0 15 20


21 Manufacturer’s Paint Spec No. Manufacturer to Furnish “*” – By vendor; “**” – From Process Data

Note: 1. Valves shall have an inherent feature using the line pressure to ensure that the line pressure cannot cause taper locking of the plug/ plug

movement into the taper, i.e. valves shall be of “pressure-balanced design” 2. Painting of valves shall be as per manufacturer’s standard 3. Material test certificates and hydrostatic test reports shall be furnished prior to despatch


P a g e | 39

4. Detailed dimensional drawings showing cross-section with part numbers and materials shall be submitted for purchaser’s approval prior to manufacture of the valves

5. All tests shall be as per BS: 6755 (part-I) 6. Valve shall have valve position indicator. 7. Stops shall be provided to ensure positive alignment of plug with ports and ensure proper installation of handle 8. Each valve shall be provided with a wrench 9. Gland packing assembly shall permit repair of gland packing under full line pressure. 10. Inspection and testing shall be as per this specification, BS: 6755 (part-I) and other relevant standards.

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