Haihao Group is a professional manufacturer of forged flanges,including weld neck flanges,blind flanges,slip on flanges,plate flanges,lap joint flanges,threaded flanges,orifice flanges,socket weld flanges,spectacle blind flanges and custom flanges.We produce the flanges in different standard such as ANSI/ASME B16.5,B16.36,B16.48,EN 1092-1,JIS B2220,GOST 12820-80,12821-80,etc.