... ,1.6,2.5,4.0,6.4,10.0,16.0, 3.DN:10---600mm Different Types of Casting or Forging Flanges ... ,1.6,2.5,4.0,6.4,10.0,16.0,DN:10---600mm1.Types: WN, SO, PL, BL, THRD, LAP ... seaport of destination, DDU named place of destination steel weld neck flange