Manufacturers & Suppliers of ASTM A182 F317L BLRTJ Blind Flange, 40\" ASME B16.47 Class 600# Blind Flange Series A, ASME SA182 F317L BLRTJ Blind Flanges, ANSI B16.5 BLRTJ, DIN 1.4438 Blind Flange, Japanese JIS SUS 317L, UNS S31703 BLRF Flange, BS 317S12, EN X2CrNiMo18-15-4.