Manufacturers & Suppliers of ASTM A182 SMO 254 BLRF Blind Flange, 18\" ASME B16.5 Class 400# Blind Flange, ASME SA182 254 SMO BLRF Blind Flanges, ANSI B16.5 BLRF, DIN 1.4547 Blind Flange, AFNOR Z1 CNDU 20.18.06Az, UNS S31254 BLRF Flange, SIS 2378, EN X1CrNiMoCuN20-18-7.