Flanges are usually welded or screwed into such systems and ... flange(PL flange),Slip-on flanges(SO flange),Welded neck flanges(WN flange),Blind flanges(BL flange),Threaded flange(TH flange), Socket welding flange(SW flange) ,PJ flange,Lap joint flange ... 24"3) 150 - 2,500lbsFlangeWN Flange, SO Flange, RTJ Flange, BL Flange, LJ Flange, SW Flange, Thread Flange, Plate flange, etc.Diameter range: 1/2'' ~ ...