Manufacturers & Suppliers of ASTM B564 Inconel 601 WNRF Weldneck Flange Series A, 58\" ASME B16.47 Class 900# Weldneck Flanges Series A, ASME SB564 Alloy 601 WNRF Welding Neck Flanges Series A, ANSI B16.5 WNRF, DIN 2.4851 Weld Neck Flange, GOST XH60BT, UNS N06601 WNRF Flange, EN NiCr23Fe, Japanese JIS NCF 601, AFNOR NC23FeA, BS NA 49.