1) Stainless steel flange and carbon steel flange 2) Standard: ASME, ANSI, DIN, UNI, BS, JIS, JPI,AWWA, MSS, API,ORIFICE Manufacture standard as ... , F321H, F347H, F317, A105, A350LF2, LF3,standard forged carbon steel flange 1)TUV and ISO 9001certificate 2)ANSI /DIN /EN 1092 ... all kind of flanges,sucn as forged SO flange,bland flanges and weled neck flange and more as customer requirements. carbon alloy ...