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Reg. 427, Reg. 428, Reg. 429, Reg. 430
TESTS FOR CLASS II FUSION WELDED SEAMS

Manholes and other openings in Shells

Manholes and other openings in boiler shells shall be placed away from any welded seam. Oval openings shall be arranged with their minor axis parallel to the longitudinal centre line of the boiler.

(a) Un-compensated openings shall comply with Regulation 187.
(b) Compensated openings shall comply with Regulations 170, 171, 186 and 279.


Reg. 428
TESTS FOR CLASS II FUSION WELDED SEAMS

Dished End Plates with pressure on Concave side

This shall comply with Regulation 408.




Reg. 429
TESTS FOR CLASS II FUSION WELDED SEAMS

Unstayed Flat End Plates

The working pressure of unstayed flat end plates shall comply with Regulation 412.

Where the diameter of the openings in an unstayed flat end plate is greater than 2½ inches or the pitch in inches is less than four times the diameter of the holes full compensation shall be provided as in Regulation 279.




Reg. 430
TESTS FOR CLASS II FUSION WELDED SEAMS

Thickness of Angle Rings

Thickness of angle rings shall comply with Regulation 379(a).

 
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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