... ,DIN,GB 2.Material:Cr25Ni35,HK40,steel 3.ISO9001:2008 Weld Neck FlangeVarieties: threaded flange, slip-on flange (SO), socket welding ... type flange, loose hubbed flange, welding plate flange, welding neck collar, welding-on collar, loose plate flange, companion flange and so on ... , medicine and other industries. 13.Payment:L/C,T/T Weld Neck Flange