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Reg. 347 C Reg. 347 D, Reg. 347 E

Bend test on the weld

A strip not less than 38mm. (1-1/2 in.) Wide cut circumferentially from one end of each selected pipe with the weld near the middle of the strip, shall when cold withstand, without showing either crack or flaw, being doubled over in the direction of original curvature round a bar, the diameter of the bar being equal to eight times the thickness of the test piece, the weld being placed at the point of maximum bending.

In cases where the outside diameter of the pipe is less than 8 times the wall thickness, the diameter of the former shall be equal to 4t or 2/3rd of the nominal bore of the pipe, whichever is less.


Reg. 347 D

Additional test

Should a pipe selected for testing fail in any one or more of the tests specified above, two further tests of the same kind may be made from the same or another pipe from the same batch. Should either of these further tests fail, the pipes represented may be reheat treated and then re-tested. If the repeat tests are satisfactory, the pipes shall be accepted provided they comply with other requirements but if failure again occurs, the pipes which the test pieces represent shall be rejected.


Reg. 347 E

Tensile test

As per requirements of Chapter II.
 
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Message from Chairman of Central Boilers Board About Central Boiler Board History of Indian Boiler Regulations Foreword Contents Chapter Wise Contents Regulation Wise List of Amendments
Indian Boilers Act 1923 Ibr Forms Home Search Help Contact Us