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Reg. 84
MATERIALS OF CONSTRUCTION

FORGED OR ROLLED PRESSURE PARTS OTHER THAN SEAMLESS DRUMS OF CARBON STEEL

Bend Tests

(a) Bend test pieces shall be of rectangular cross section machined to a finished size of 1 inch wide by ¾ inch thick. In the case of headers, bend test pieces may be cut transversely 1½ T wide by T thick where T is the thickness of the header. The edges shall be rounded to a radius of 1/16 inch. The test pieces shall be bent over the thinner section.

(b) Test pieces shall be bent when cold through an angle of 180° without fracture, the internal radius of the bend being not greater than that specified in table below for the 1 inch wide by ¾ inch thick test piece and not more than 1½ T for the full thickness test piece:

Ultimate tensile stress

Internal radius of bend

Tons/sq. inch

Inch

Upto 32 1/4
Above 32 and upto 36 3/8
Above 36 and upto 38 5/8

Bend tests may be made by pressure or by blows.
 
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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