... of standard flanges and special application flanges.we can offer : Plate flange(PL flange),Slip-on flanges(SO flange),Welded neck ... , SO Flange, RTJ Flange, BL Flange, LJ Flange, SW Flange, Thread Flange, Plate flange, etc.Diameter range: 1/2'' ~72'' (DN15~DN1800 ...