1) Design and manufacture :By ANSI . B16.34; API 602.

 

2) Size-end connectivity:1)Jack for size:By ANSI  B16.11; JIS B2306

 

3) Screw terminal size:By ANSI B1.20.1  BS21;JIS B0203; ISO7/1

 

4) Valve inspection and testing:By API  598

 

5) Structure:  B.B;OS&Y or W.B;OS&Y

 

6) Materials:By AISI/ASTM Provisions

 

7) The main material:A105; F5;F11;F22; 304; 304L; 316; 316L; LF2,etc