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Reg. 111, Reg. 112
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Alternative Construction

As an alternative to the tucking of butt strap ends under the shell rings, the ends may be terminated at the edge of the shell rings or ends and electrically welded thereto.



Reg. 112
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Local Welding of Butt Seams

(a) The ends of longitudinal butt seams of shell rings may be welded for a length not exceeding three times the overlap at the circumferential seam, provided the butt straps are run as closely as practicable to the circumferential seam.

(b) Only metal arc welding of the butt seams of shell rings shall be permitted.

(c) Where hemispherical shell crowns are pressed from plate they shall be pressed to form by machine in progressive stages without thinning and on completion shall be annealed.


 
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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