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Are there standards for large and small heads?

2009-03-27View Original

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Are there standards for large and small heads? What are the standards?
Reply #22009-03-27
Please give it a boost; I really want to know too
Reply #32009-03-27
National standard: GB/T12459； American Standard ASME B16.9
Reply #42009-03-27
The answer above is correct; I used GB/T12459 in the projects I’ve worked on. There is an electronic version on the forum.

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Translated at 2026-07-28 02:16:58

Original: https://bbs.hcbbs.com/thread-427595-1-1.html

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