... 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, welding neck collar, welding-on collar, loose plate flange, companion flange ... coating and so on. Detailed information as follows:1.Standard:ANSI,ASTM,ASME,DIN,GB2.Material:carbon steel,stainless steel and ...