... .5 B16.47 1) ANSI/ASME B16.5 Steel flange,Blind flange,carbon steel flange2) Method:free forging,die forging,rolling3) Pressure ... Joint,Socket Weld,Threaded,5) Material: Carbon steel:A105,ST37.2,S235JR,Q235,P250GH Stainless steel:F304,F316,316L6) Marking: depends on your ... ) Quality control:Internal/ISO900110) Inspection:Internal/Third party Forged Flanges and Pipe Fittings