... , Socket Welding Flange, Threaded Flange, Lap Joint Flange, Blind Flange and other kinds of special flanges.Standard:America:ASME B16.5 ... (2205),S32304,S32205,S32760,S32750,HDRCopper Nickel Alloy:B10,B30Special steel:N06600,N08800,N08811,Titanium alloy, Alloy steel etc.Carbon manganese steel:20# / Q235B ...