ISO9001 and CE certificate Stainless Steel Welding Neck FlangeSize:3/4"-30" 150LB-2500LB. ... FlangeSize 3/4"- 30". Kinds Slip on flanges,welding neck flanges,blind flanges,plate flanges,socket welded flanges ... ANSI B16.5,DIN,JIS,UNI,BS4504,EN1092-1Material Stainless SteelGrade 304,304L,316,316L,321,321H.Face ... the client's request.Certificate ISO9001 Certificate. Stainless Steel Welding Neck Flange