Manufacturers & Suppliers of ASTM A182 SMO 254 SWRF Socket Weld Flange, 1-1/2\" ASME B16.5 Class 150# Socket Weld Flanges, ASME SA182 254 SMO SWRF Socket Weld Flanges, ANSI B16.5 SWRF, DIN 1.4547 Socket Weld Flange, AFNOR Z1 CNDU 20.18.06Az, UNS S31254 SWRF Flange, SIS 2378, EN X1CrNiMoCuN20-18-7.