Manufacturers & Suppliers of ASTM B564 Hastelloy C276 WNRF Weldneck Flange, 16\" WNRF Flanges Sch 60, ASME B16.5 Class 600# Weldneck Flange, ASME SB564 Alloy C276 WNRF Welding Neck Flanges, ANSI B16.5 WNRF, DIN 2.4819 Welding Flange, Japanese JIS NW 0276, UNS N10276 WNRF Flange, EN NiMo16Cr15W.