Flat Welding Flange ANSI B16.5/B16.47 Flange, DIN Standard Flange, ... EN10204 3.1 Certificate. Medium:W.O.G Slipon Welding Flangeslip-on welding flangeMaterials, Grades (stainless steel) include:1.4301 SS, 1 ... ) Blind/ Slip-on/SCH 10(SCH 40, SCH 80) WeldingNeck/ Plate/ Socket weld/ Threaded/ Lap Joint Flange3. JIS 5K, 10K, 16K ...