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Feed pump Inlet Flange thickness

Feed pump Inlet Flange thickness

Feed pump Inlet Flange thickness

(OP)

Where could I find the minimum allowable thickness for a raised face flange for a boiler feedwater pump inlet. There is damage to the gasket seating area and it must be machined out. Is this ANSI or ASME scope?

RE: Feed pump Inlet Flange thickness

Bob,

This is really a question for the pump vendor.....or sales rep

The required thickness of a pump flange is dependent on the casing material used as well as the maximum operating temperature used in the design of the pump.

Pump vendors typically design a flange to match the dimensional requirements of the adjoining piping (probably ANSI Class 150 or 300 in your case).....then they "add a margin" to the flange thickness and hydrostatically test to 1.5 times the deign pressure.

I know that this is a long answer.......but there is no calculation proceedure for such a situation

If this is an old pump, I would not hesitate to ask a competitive pump vendor this question.

Good luck....

MJC

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