... holder, manhole cover, stub,clamp,union ,valve etc Stainless Steel Flange StandardsASTMA182,ANSI B16.9, ANSI B16.28, EN10253-2, EN1092 ... , etc.TypePlate type Flat Welding Flange,Slip on Neck Flange,Welding Neck Flange,Blind Flange,Socket Welding Flange,Thread Flange,Screwed Flange,Lap Joint Stainless Steel Reducer StandardDIN 2527 ...