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Reg. 102, Reg. 103, Reg. 104
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Cylindrical Shells

Each ring shall be bent while cold to cylindrical form to the extreme ends of the plate. The bending shall be done entirely by machine and heating or hammering is prohibited.


Reg. 103
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Position of Longitudinal Seams

Each ring of plate forming the shell, barrel or drum shell, where practicable, be in one piece and have its longitudinal seam well out of line with those of the adjoining rings. In Lancashire, Cornish, and other types of boilers, where parts of the shell are exposed to flame, the longitudinal seams shall, where practicable, be in the steam space, arranged alternately on each side of the crown and clear of the brick work.


Reg. 104
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Circumferential and End Seams

The calculated efficiencies of circumferential joints based on the thickness of plate determined by Equation1, shall be not less than 38 per cent for joints connecting end plates with cylindrical shells or 42 per cent for intermediate joints. In no case, however, shall the efficiency of an intermediate joint be less than 50 per cent of that of the longitudinal joints. Where the shell plate thickness exceeds 11/16 inch the intermediate circumferential joints shall be double riveted.

 
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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