Fitting execution standards
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Which standard does piping fittings (elbows, tees, etc.) follow? US standard? What are the standard numbers for national standards and similar? What standards do valves comply with? (US standard, Chinese standard) Standard number? Please provide the corresponding American standard and Chinese standard numbers! Thank you. . . . . . . . .
GBT12459-2005 Steel butt-welded seamless pipe fittings; GB T 13401-2005 Steel plate-based butt-welded pipe fittings; GBT 14383-2008 Forged socket-welded and threaded pipe fittings; GB-T 14626 Forged steel threaded pipe fittings; ASME B16.9 Steel butt-welded seamless pipe fittings; ASME B16.11-2005 Socket-welded and threaded forged pipe fittings; ASME B16.28 Forged steel butt-welding short-radius elbows and return fittings; ASME B16.34 Valves, flanged, threaded, and welding-end type. It seems that national standard valves are classified in certain ways; I’m not clear about that. Valves