Nubbin on a Body Flange
Nubbin on a Body Flange
(OP)
What drives the requirement for a Nubbin on a Heat Exchanger Shell Flange?
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RE: Nubbin on a Body Flange
RE: Nubbin on a Body Flange
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RE: Nubbin on a Body Flange
2) Cost. Per Appendix 2 of ASME Section VIII Div. 1, machining a nubbin onto the flange gasket surface usually reduces the required bolting area so that fewer (or smaller diameter) bolts can be used.
Personally I'd recommend against using nubbins if you have a choice.
-Christine