Manufacturers & Suppliers of ASTM A182 F347 BLRF Blind Flanges, 50\" ASME B16.5 Class 400# Blind Flange, ASME SA182 F347 BLRF Blind Flanges, ANSI B16.5 BLRF, DIN 1.4550 Blind Flange, GOST 08Ch18N12B, UNS S34700 BLRF Flanges, EN X6CrNiNb18-10, Japanese JIS SUS 347.