Standards:

Design & Manufacture: GB/T 12234, ASME B 16.34
Flange Standard: HG20592, ASME B B16.5
End to End: GB/T 12221,ANSI B16.10
Lining thickness: 3 to 5mm
Testing standards: API 598 / PN10 / PN16
FEP (PTFE) - ASTM D 2116, Type IV
PFA (PTFE) - ASTM D3307, Type II