China Plate Welded Flange, Carbon Steel Flange, Find details about China Carbon Steel Flange, Flange from Plate Welded Flange, Carbon Steel Flange
Production standard
National standard: GB/T9112-2010 (GB9113, 1-2010 - GB9123, 4-2010)
Department of Chemical Industry standard :HG5010-52~HG5028-58, HGJ44-91~HGJ65-91, HG20592-2009 series, HG20615-2009 series
Mechanical standard :JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994
Pressure vessel standard :JB1157-82~JB1160-82, JB4700-2000~JB4707-2000 B16.47A/B B16.39B16.
Petrochemical standard: SH/T3406-1996