... ,DIN,GB 2.Material:Cr25Ni35,HK40,steel 3.ISO9001:2008 Weld Neck FlangeVarieties: threaded flange, slip-on flange (SO), socket welding ... .Application area: oil, chemical industry, nuclear power station, food manufacturing, construction, shipbuilding, paper making, medicine and other industries. 13.Payment:L ...