welding flange 304 Standard:ASME,GB, DIN, JIS, Sealing face:(RF), (FF), (MFM) (LG) Pressure :0.25--25 (Mpa) welding flange 304Standard: ANSI ASTM ASME JIS BS MSS DIN SH etc.Material: stainless steel flange, duplex stainless steel flange, nickel alloy steel flange. Stainless steel: ASTM A403 WP304,304L,316,316L,321; ASTM A182 F304,304L,316,316L,321,904L,347, 904L,etc Duplex steel: ASTM A182 F51/ ...