... flange, slip-on flange (SO), socket welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice flange, reducing flange, pad type flange, loose hubbed flange, welding plate flange ... , 2632, 2633, 2634, 26358.Usage: connecting pipe line and keep its leakproofness; convenient for ... easy to seal pipe line9.Application area: Connecting various pipelines, which convey gas, water ...