●Design: API 602,BS5352，ANSI B16.34
a.Scoket welded ends conform to ANSI B16.11;GB/T1751
b.Screw ends conform to ANSI B1.20.1;GB/T7306
c.Butt-welded ends conform to ANSI B16.25;GB/T12224
d.Flanged ends conform to ANSI B16.5;GB/T79
●Test & inspection: API 598; GB/T13927
Bolted bonnet, outside screw and yoke.
Welded bonnet,outside screw and yoke.
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