Design confirms
BS 5352 or API 602
Socket welded ends confirm
ANSI B16.11;JB/T1751
Screw ends confirm
ANSI B 1.20.1;JB/T7306
Butt-welded ends confirm
ANSI B16.25;JB/T12224
Flnaged ends confirm
ANSI B 16.5;JB79
Test and inspection confirm
API598;GB/T13927;JB/T9092
Bolted bonnet
outsite screw and yoke
welded bonnet
outsite screw and yoke
Material confirm
ANSI/ASTM
Main material
A105;LF2;304L;316L;F347;F321;F51;Monel,ect