1、設計制造Design and manufacture conform to BS5352 MSS SP-118：
2、連接端尺寸Connection ends conform to
1)承插口尺寸按Scoket welded ends conform to ANSI B16.11;JB/T1751
2)螺紋端尺寸按Screw ends conform to ANSI B1.20.1;JB/T7306
3)對焊端尺寸按Butt-welded conform to ANSI B16.25;JB/T12224
4)法蘭端尺寸按Flanged ends conform to ANSI B16.5;JB79
3、閥門檢查和試驗Test and inspection conform to:
API 598;GB/T13927;JB/T9092
4、結(jié)構(gòu)特征Structure features:
螺栓連接閥蓋(B.B)焊接閥蓋(W.B) Bolted bonnet or welding bonnet