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Which standard should be used to determine the inner diameter of American standard flanges?

2009-03-25View Original

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Which standard should be used to determine the inner diameter of American standard flanges? Neither ASME B16.5 nor B16.47 specify inner diameter dimensions – why is that?
Reply #22009-03-25
Generally, I follow ASME B16.34; in some cases, API 6D may be used instead. You need to confirm this with the customer! !
Reply #32009-03-25
Check the pipe designation of the pipe used with it

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