Forged Steel Flange: Welding Neck, Slip-on, Blind, Plate flange ANSI B16.5, BS4504, DIN2633, EN1092-1 ISO TUV Certificate Forged Steel Flange:Welding Neck Flanges, Slip ... -on Flanges, Blind , Plate Flanges, Socket Weld Flanges,Threaded Flanges ... ,PN16,PN25,PN40,PN50,PN110,PN150, PN260,PN420 Forged Carbon Steel Flange