forged carbon steel blind flange: OEM service offered ISO9001authentication, 15 years of experience, good quality and pr 1) ANSI/ASME B16.5 Steel flange,Blind flange,carbon steel flange2) Method:free ... ,Lap Joint,Socket Weld,Threaded,5) Material: Carbon steel:A105,ST37.2,S235JR,Q235,P250GH Stainless steel:F304,F316,316L6) Marking: depends on ...