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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 />

TITLE PIPING FABRICATION AND<br />

ERECTION<br />

STANDARD SPECIFICATION<br />

SPECIFICATION NO. PAGE 47 OF 62<br />

MEC/S/05/62/06 REVISION 0<br />

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Nominal wall thickness in Test Specimens width in<br />

mm mm<br />

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> 12 12<br />

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> 9.5 and ≤ 12 7.5<br />

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≥ 7 and ≤ 9.5 5<br />

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< 7 2.5<br />

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1.6.2 Test Method<br />

The test shall be carried out as indicated in ISO R 148 "Beam Impact Test Vnotch.<br />

Test pieces shall be immersed in a thermostatic bath and maintained at the test<br />

temperature for at least 15 minutes. They shall than be placed in the testing<br />

machine and broken within 5 seconds <strong>of</strong> their removal from the batch.<br />

1.6.3 Requirements<br />

The impact energy shall be greater or equal to :-<br />

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Test Specimens in Average <strong>of</strong> Minimum<br />

mm Three specimens Single Value<br />

Joule (min) (Note-2) Joules (Note 1)<br />

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10 27 22<br />

7.5 21.5 17.5<br />

5 18.5 15.0<br />

2.5 10.0 8.0<br />

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Note:<br />

1) Only one value is permitted to be lower than average upto the value<br />

specified.

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