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Questions regarding the JB/T 81-94 standard

2009-04-03View Original

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While drawing, I noticed that the JB/T 81-94 standard specifies two series for the outer diameter of flanges: Series 1 and Series 2. I would like to ask how to choose between these two series, and when to use each one.
Reply #22009-04-03
Series 1 and 2 correspond to imperial pipes
Reply #32009-04-04
When specifying flange dimensions, Series 1 must be indicated; if nothing is specified, it means that Series 2 dimensions are being used.

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Translated at 2026-07-28 01:28:42

Original: https://bbs.hcbbs.com/thread-434122-1-1.html

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