What are the American standard, Chinese standard, imperial, and industrial standard valves, fittings, and flanges?
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A beginner who is just getting started – what are the differences between American standards, Chinese standards, imperial standards, and metric standards regarding valves, fittings, and flanges?
They probably want to meet standards and try to achieve it all at once.
There are countless such standards; taking the American standard as an example； Flanges: ASME B16.5, ASME B16.47, API 605, etc ； Fittings: ASME B16.9/B16.11, MSS SP-95/97, etc.