1、 ASME B16.34
2、Connection end size:
1)ANSI B16.11;JB/T1751
2)ANSI B1.20.1;JB/T7306
3)ANSl B16.25; JB/T12224
4)Flanged ends conform to ANSI B16.5;JB79
3、Valve inspection and test:
API 598; GB/T13927; JB/T9092
4、structure characteristics:
Self tightening seal of bolt connection valve cover;Y type and T type