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ANSI B16.5 flat flanges with ANSI B16.1 flat face flanges.

ANSI B16.5 flat flanges with ANSI B16.1 flat face flanges.

ANSI B16.5 flat flanges with ANSI B16.1 flat face flanges.

Dear flange experts.

I´d like to know if it´s possible to mate ANSI B16.5 flat flanges with ANSI B16.1 flat face flanges.

I have carbon steel pipes with ANSI B16.5 A105, class 150 flat face flanges, and want to install betwen them cast iron valves with ANSI B16.1 flat face flanges

RE: ANSI B16.5 flat flanges with ANSI B16.1 flat face flanges.

It's actually ASME B16.5 and B16.1, to put my pedantic hat on, but yes you can mate ASME B16.5 Class 150 flanges to ASME B16.1 flanges. Having flat face flanges is a good (essential) start, but see also Clause 5.3.5 in ASME B16.5 for recommendations for bolting to cast iron flanges.

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