... face, Longue, Groove, Spigot, Recess, O-ring spigot, O-ring spigot.StandardDIN2527,DIN2566,DIN2573,DIN2573,DIN2576,DIN2631,DIN2632, ... B16.5/B16.47, MSS SP-44ISOJISMaterial(Carbon Steel):ASTM A105,20#,Q235,16Mn, ASTM A350 LF1, ... A182 F304,304L, F316,316L,1Cr18Ni9Ti,0Cr18Ni9Ti,321,18-8(Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, ... !You will get our quick reply! Alloy Steel Socket Welding Flange