Weld Neck Flange

Weld neck flanges welding neck flanges WNRF flanges manufacturer from China, weld neck flanges pressure PN6 PN10 PN16 PN25 PN40 norms for DIN EN1092-1 BS4504 GOST12821-80, weld neck flanges class 150 300 600 900 1500 2500 norms for ANSI B16.5 and ANSI B16.47, weld neck flanges steel for carbon steel and stainless steel, hyupshin flanges co., ltd is weld neck flanges manufacturer