Manufacturers & Suppliers of ASTM B564 Inconel 690 BLRTJ Blind Flange, 40\" ASME B16.47 Class 900# Blind Flange Series A, ASME SB564 Inconel 690 BLRTJ Blind Flanges, ANSI B16.5 Blind Flange, DIN 2.4856 BLRTJ Blind Flange, UNS N06690 Blind Flange, Japanese JIS NCF 6690.