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Reg. 282 b, Reg. 282 c

(b) Limits of cast Iron

Cast Iron shall not be used for: -

a) Temperatures above 220°C;
b) Pressure exceeding 13 bar guage;
c) Valves exceeding 200 mm nominal bore which are connected directly to the boiler;
d) Wedge or double disc gate valves which are connected directly to the boiler;
e) Boiler blow down fittings.

Explanation: The expression ‘connected directly to the boiler’ covers any valve which cannot itself be isolated from the boiler.

Note:-
Spherodial iron may be used for temperature not exceeding 282 °C and pressure not exceeding 17.58 kg/cm2 provided it complies with the following requirements in respect of the physical properties.

(a) 0.2% proof stress 250 kg/mm2
(b) minimum elongation percent-12.



Reg. 282 c

Limits of copper alloy

Copper alloy shall not be used for temperatures above 225°C where the valves are connected directly to the boiler. In the case of valves not connected directly to the boiler this temperature limitation may be increased to 260°C.
 
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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