1Design and manufacture conform to API602  BS5352  ANSI B16.34
2Connection ends conform to
(1)Socket welded ends conform to ANSI  B16.11 JB/T1751
(2)Screw ends conform to ANSI B1.20.1JB/T7306
(3)Butt-welded ends conform to ANSI B16.25 JB/T12224
(4)Flanged ends conform to ANSI B16.5JB79
3Test and inspection conform toAPI 598 GB/T13927 JB/T9092
4.Structure features: Bolted bonnet,outside screw and yoke, Welded bonnet,outside screw and yoke
5.Materials conform to ANIS/ASTM
6.Main materials:A105 LF2 F5 F11 F22 304 L316 LF347 F321 F51 Monel20  Alloy