scope of work & specification - GAIL (India) Ltd.
scope of work & specification - GAIL (India) Ltd.
scope of work & specification - GAIL (India) Ltd.
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6.1.7 Other inspection and testing requirements shall be as per respective Standard<br />
<strong>specification</strong>s <strong>of</strong> various instrument items.<br />
6.2 SKID:<br />
The following tests shall be conducted for the skid<br />
a. Hydro testing<br />
b. Pneumatic Leak test <strong>of</strong> complete skid at 7 Kg/cm2.<br />
c. Skid functional testing considering metering, pressure regulation, limiting and safety<br />
characteristics. (Functional testing <strong>of</strong> PCV / Slam shut valves shall be demonstrated by<br />
simulation in vendor’s shop)<br />
d. Skid piping material testing and NDT <strong>of</strong> welds as per Piping material <strong>specification</strong>s.<br />
Radiography/X-ray shall be carried out for all welded joints and vendor shall furnish test<br />
certificate for the same. Dye-penetration test certificate shall be provided for joints wherever<br />
radiography/x-ray is not possible.<br />
e. Radiography/X-ray , Charpy impact testing for line mounted instrument items such as Self<br />
actuated pressure control /monitor valves , pressure relief valves, slam shut valves,<br />
Ultrasonic meters and meter runs etc.<br />
f. Testing and inspection requirements for Gas filter equipment and for skid piping materials<br />
shall be as per <strong>specification</strong>s attached else where in the bid package.<br />
6.3 Skid Equipments<br />
The following tests shall be conducted :<br />
6.3.1 Requirements <strong>of</strong> non destructive testing like radiography, magnetic particle test, hardness test,<br />
hydrotest, Charpy test for Self actuated control valves , pressure relief valves, slam shut valves,<br />
Ultrasonic meters and meter runs shall be carried out strictly as per following <strong>specification</strong>.<br />
a) 100% radiography shall be carried out on all casting. Radiography procedure and area <strong>of</strong><br />
casting to be radiographed shall be as per ANSI B16.34 and acceptance criteria shall be as<br />
per ANSI B16.34 Annexure B. Two shots shall be taken for each area to be radiographed,<br />
as a minimum.<br />
b) Radiography/X-ray shall be carried out for all welded joints and vendor shall furnish test<br />
certificate for the same. Dye-penetration test certificate shall be provided for joints wherever<br />
radiography/x-ray is not possible.<br />
c) Each ultrasonic meter along with meter runs shall be subjected to hydrostatic test with a<br />
pressure <strong>of</strong> 1.5 times the design pressure.<br />
d) Charpy impact test on each heat <strong>of</strong> base material shall be conducted as per A370 for all<br />
pressure containing parts such as body, end flanges and welding ends as well as bolting<br />
material for pressure containing parts. Unless specified otherwise, the Charpy impact test<br />
shall be conducted at 0°C. The Charpy impact test specimen shall be taken in the direction<br />
<strong>of</strong> principal grain flow and notched perpendicular to the original surface <strong>of</strong> plate or<br />
forging.The minimum average absorbed energy per set <strong>of</strong> three specimens shall be 27J<br />
with an individual minimum per specimen <strong>of</strong> 22 J.<br />
6.3.2 Flow meter, meter run, flow computer and accessories shall be <strong>of</strong>fered for pre- dispatch<br />
inspection to <strong>GAIL</strong> and / or <strong>GAIL</strong>'s representatives. Following tests , checks shall be conducted:<br />
a) Physical/ dimensional checks and <strong>work</strong>manship. Checking <strong>of</strong> meter tube roughness.<br />
b) Calibration including establishing linearity and repeatability over the entire range. Wet<br />
calibration <strong>of</strong> Ultrasonic Flow Meter shall be performed along with the meter runs<br />
and flow pr<strong>of</strong>iler to be supplied with the skid.<br />
c) Functional and simulation tests including checking <strong>of</strong> hardware and s<strong>of</strong>tware for Flow<br />
computers including ultrasonic flow meters and gas chromatographs with all its subsystems<br />
in fully integrated configuration.<br />
d) All the panels along with all instruments mounted on it including flow computers, indicators,<br />
barriers, isolators and accessories etc.<br />
e) Review <strong>of</strong> all certificates and test reports.<br />
In the event the purchaser is unable to witness a test, the test shall anyway be completed<br />
by the vendor and documents for the same shall be submitted for scrutiny before shipment.<br />
f) All tests as per Standard <strong>specification</strong>s attached with this bid document.<br />
6.3.3 Following tests shall be carried out by vendor at his <strong>work</strong>s and test certificates shall be furnished:<br />
a) Calibration / test certificates for all instruments. Calibration test reports for flow meters duly
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