Flange Production Standards

Lub teb chaws tus qauv: GB/T9112-2010 (GB9113·1-2010-GB9123·4-2010)
Ministry of Chemical Industry Standards: HG5010-52-HG5028-58, HGJ44-91-HGJ65-91, HG20592-2009 series, HG20615-2009 series
Ministry of Machinery Standards: JB81-59-JB86-59, JB/T79-94-JB/T86-94, JB/T74-1994
Cov qauv ntawm lub nkoj siab: JB1157-82-JB1160-82, NB/T47020-2012-NB/T47027-2012, B16.47A/B B16.39 B16.