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Reg. 431, Reg. 432, Reg. 433, Reg. 434
TESTS FOR CLASS II FUSION WELDED SEAMS

Bolts, nuts and studs shall comply with Regulation 208.



Reg. 432
TESTS FOR CLASS II FUSION WELDED SEAMS

Seatings and mountings shall comply with Regulation 409.




Reg. 433
TESTS FOR CLASS II FUSION WELDED SEAMS

Hydraulic Test

The requirement of Hydraulic Test shall comply with regulation 379(a).




Reg. 434
SEAMLESS SHELL BOILERS

Determination of Working Pressure

The working pressure shall be determined in accordance with Regulation 425 except that the minimum thickness of the shell shall comply with the following table:-

Internal diameter inches Minimum thickness inches
Upto and including 24 1/4
Over 24 up to and including 36 5/16
Over 36 3/8

In no case shall the factor of safety of the cylindrical shell and ends be less than 4.

The value of C in the equation shall be taken as 35. Where the ends are welded to shell or mechanically secured and welded they shall be stress-relieved.
 
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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