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Reg. 287, Reg. 288, Reg. 289

Moving Parts

The valves and spindles shall be efficiently guided and means shall be provided in every case to prevent them leaving their guides. The working parts shall have sufficient clearance to ensure freedom of movement under all conditions of service.



Reg. 288

Flanges

a) Flanges shall be in accordance with the tables for the appropriate pressure (Appendix E).
b) In the case of safety valves, the drilling, thickness and bolting of inlet flanges shall be in accordance with tables for the appropriate pressure and material and for the diameter of flange adopted. In the case of outlet flanges the pressure taken shall be the pressure on the outlet side of the valve.
c) For the purpose of determining particulars of flanges for blow down and scum pipe fittings, the design pressure of the fittings shall be assumed to be the working pressure of the boiler.
d) All flanges shall be machined on the face, spot faced, or machined at the back, and the bolt holes shall be drilled.



Reg. 289

Valve Seatings

Where separate seats are fitted they shall be efficiently secured. Means shall be provided in every case to prevent the valves leaving their guides.
 
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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
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