Manufacturers & Suppliers of ASTM B564 Hastelloy C276 WNRF Weldneck Flange Series A, 46\" ASME B16.47 Class 400# Weldneck Flanges Series A, ASME SB564 Alloy C276 WNRF Welding Neck Flanges Series A, ANSI B16.5 WNRF, DIN 2.4819 Weld Neck Flange, EN NiMo16Cr15W, UNS N10276 WNRF Flange, GOST ??65???, Japanese JIS NW 0276.