... flange, Socket Welding flange, Threaded flange, Lap Joint flange and Plate flange etc.Applicable standard GB, ASME , ASTM, MSS ,JIS , DIN ... conservancy, electric power, boiler, machinery, metallurgy, sanitary construction etc.QualityISO9001:2008; ISO14001; OHSAS,TUVPackagingWooden cases ,wooden pallet ,plastic bag, polywood case ...