Application specification:
Design and manufacture to Q/TFJ2.1009、BS1414、MSS-SP-117、ASME B 16.34
Face to face dimension to ANSI B16.10
Butt welded end dimensions  to  ASME B16.25
Valve inspection and test to API 598

Structures: B.B、OS&Y or W.B、OS&Y

Material in accordance with the stipulstion of ANSI/ASTM