... ,HK40,steel 3.ISO9001:2008 Weld Neck Slip on Lap Joint Flange Varieties: threaded flange, slip-on flange (SO), socket ... welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice flange ... , nuclear power station, food manufacturing, construction, shipbuilding, paper making, medicine and other industries. 13.Payment:L/C,T/T Weld ...