Application criterion
1, Design and manufacture: To ANSI B16.34; API602
2, Size of coupling end:
(1). Size of socket joint hole: To ANSI B16.11, JIS B23.6
(2). Size of threaded end: To ANSI B1.20.1: BS21: JIS BO203: S107/1
3, Valve inspection and test: To API 598
4, Structure characteristics: B. B; OS&Y OR W. B; OS&Y
5, Material: To AIS/ASTM
6, Materiare fo main body:
A105; F5, F11; F22; 304; 304L; 316; 316L; LF2. Etc