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Volume-II of IV - GAIL

Volume-II of IV - GAIL

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MECON LIMITED<br />

REGD. OFF : RANCHI (BIHAR)<br />

PROCESS & PIPING<br />

DESIGN SECTION<br />

NEW DELHI<br />

STANDARD SPECIFICATION<br />

TITLE WELDING OF ONSHORE GAS<br />

SPECIFICATION NO. PAGE 44 OF 48<br />

PIPELINES<br />

MEC/S/05/62/02 REVISION<br />

ANNEXURE-<strong>II</strong>I<br />

Sheet 2 <strong>of</strong> 3<br />

Time lapse between commencement <strong>of</strong><br />

root and commencement <strong>of</strong> second run<br />

Time lapse between commencement <strong>of</strong><br />

second run and commencement <strong>of</strong> other run<br />

Minimum number <strong>of</strong> runs before joint<br />

allowed to cool<br />

Maximum time between commencement<br />

and completion or weld<br />

Type <strong>of</strong> line-up clamp<br />

Removal <strong>of</strong> clamp after run :<br />

Lowering <strong>of</strong>f after run<br />

Cleaning<br />

Preheating<br />

Minimum temperature °C Ambient Temperature °C<br />

Type <strong>of</strong> heater to be used<br />

Interpass temperature<br />

Minimum °C Maximum °C<br />

Post weld heat treatment<br />

Speed <strong>of</strong> travel<br />

Test Results<br />

State acceptable non-acceptable<br />

(with reasons) or give numerical results<br />

Non-destructive test :-<br />

Visual<br />

Radiograph<br />

\\Akjha\work contrac\standard TS for Pipe Line WC (Vol-<strong>II</strong>) MASTER FOLDER\02A welding onshore gas pipeline\Welding <strong>of</strong> Onshore Gas Pipelines with addendum - I 02A.doc

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