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Reg. 555 e, Reg. 555 f, Reg. 555 g

Attachment of pads

 

Pads welded to the shell or end plate shall be welded internally and externally.

Methods of attachment of pads shall be as shown in Figures XII/90, XII/91, or XII/92. Where the bore of the seating does not exceed 5 inches twice the thickness of the plate to which it is attached, the pad may be welded to the plate without subsequent heat-treatment of the weld so made. If these limits are exceeded, the whole plate to which the pad is attached shall be stress relieved by heat-treatment on completion of the welding.




Reg. 555 f

Attachment of water and pressure gauges

Water gauges and pressure gauge siphons maybe attached direct to the front end plate without the intervention of a pad or standpipe, provided they are flanged and secured by studs. If the studs are screwed through the plate, nuts of full thickness shall be fitted on the inside of the plate.




Reg. 555 g

Bolts and Nuts

All holes for bolts and studs shall be drilled and bolts and nuts shall be machined where in contact with the flanges.

 
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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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