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Reg. 37
MATERIALS OF CONSTRUCTION

COLD DRAWN SEAMLESS CAR BON STEEL BOILER, SUPERHEATER AND HEAT EXCHANGER TUBES FOR DESIGN METAL TEMPERATURES NOT EXCEEDING 454°C (850°F).

Selection of Tubes for Test

(a)  Test Specimens (i) Test specimens required for the flattening and expanding/ flaring test specified in regulations 38, 39 and 40 shall be taken from the ends of finished tubes prior to upsetting swaging, expanding or any other forming operations or being cut to length.  They shall be smooth on the ends and free from burrs and flaws.

(ii) If desirable and practicable, tensile test may be carried out on full section of the tubes up to the capacity of the testing machine.  For large size tubes, the tensile test specimen shall consist of strip cut longitudinally from the tube and which is not straightened within the gauge length and further heat treated.

(iii) If any test specimen shows flaws or defective machining it may be discarded and another specimen substituted.

(iv)  All specimens shall be tested at room temperature.

(b)   Number of tests. - The test specified in regulations 38, 39 and 40 shall be made on minimum 2 tubes for first 100 tubes and 1 per 100 or part thereof for tubes over 100 numbers.

 
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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