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Reg. 108, Reg. 109, Reg. 110
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Longitudinal Seams


The longitudinal seams of shell belts shall be butt-jointed with double straps when the diameter or Working Pressure exceeds the limits stated below :-

Type of Boiler When diameter exceeds
(feet)
When Working Pressure exceeds
(lbs/sq. inch)
Loco Types 200
Vertical Types 6 125
Other Types 6 80




Reg. 109
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

 

Butt Straps

Butt straps shall be cut from the shell plates, or, alternatively, all the butt straps of each required thickness shall be cut from one plate. The lengths of the straps wherever practicable shall be transverse to the direction of rolling of the plate. Straps shall be pressed or bent in rolls to the shell curvature.



Reg. 110
SHELLS, ANGLE RINGS, BUTT STRAPS, ETC.

Thinning of Butt Straps

Thinning of the ends of the butt straps which tuck under shell rings, shall be done cold by machine and not by heating or hammering. The shell plate shall be notched out to receive that thinned end of the butt strap, so that there shall be no undue thinning of the butt strap.


 
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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