... "-80" material:stainless steel certificate:ISO9001 and bv stainless steel pipes fittings Stainless Steel ElbowStandardASME SA403,BS16.9 ... cover, stub,clamp,union ,valve etc Stainless Steel Flange StandardsASTMA182,ANSI B16.9, ANSI B16.28 ... ,Thread Flange,Screwed Flange,Lap Joint Stainless Steel Reducer StandardDIN 2527,2573,2576,2642,2633 ... company certificate:contact way: stainless steel pipes fittings