Standard: National Standard GB/T9112~9124-2012, Mechanical Department JB/T74~90-94, Chemical Industry HG/T20592~20635-2010, Pressure Vessel Flanges NB/T47021~47027-2010, Marine Flanges (Four Decimal Places) GB/T10745~10751-89, Large Diameter Flanges ASME B16.7-2010, Oil Industry SH3406-96 Blind Flanges, Insert Flanges HG21547-93, Marine Welding Flanges CB/T46-2007, GB/T2506-2005, International Standard ISO7005-1992, ASME/ANSI B16.5-1996 Pipe Flanges and Pipe Fittings...

Standard: National Standard GB/T9112~9124-2012, Mechanical Department JB/T74~90-94, Chemical Industry HG/T20592~20635-2010, Pressure Vessel Flanges NB/T47021~47027-2010, Ship Flanges (Four Decimal Places) GB/T10745~10751-89, ASME Large Diameter Flanges ASME B16.7-2010, Petroleum Department SH3406-96 Blind Flanges, Plug Flanges HG21547-93, Ship Welded Flanges CB/T46-2007, GB/T2506-2005, International Standard ISO7005-1992, ASME/ANSI Pipe Flanges and Fittings ASME/ANSI B16.5-1996, HG5010-58 Large Diameter Series, JB81-94, German Standard DIN2527, BS EN1092-1, Non-standard Forged Large Flanges, Rolled Large Flanges, etc. Materials include 304, 347, 2205, 316L, 904L, etc.