Standard or Nonstandard
Standard
Design standard
API 602, ANSI B16.34, BS 5352, GB/T12224, GB/T12228, GB/T12234
Socket welding end
ANSI B16.11, JB/T 175-95
Screw end
ANSI B1.20.10(NPT), GB/T7306-87(RC)
Butt welding end
ANSI B16.25, GB/T12224
Flange end
ANSI B16.5, JB/T82.1~82.4-94
Face to face(Flange)
ANSI B16.10, JB/T97-95
Construction
BB or WB, OS & Y
Inspect and test
API 598, GB/T13924, JB/T9092
Body material
A105, LF2, F5, F11, F22, F304, F316, F304L, F316L, F347, F321, F51