... , slip-on flange (SO), slip-on welding flange, socket welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice ... face, flat face, ring type joint, lap-joint face, male- female, tongue & groove 5. Flange Materialls: ASTM A234 WPB, WPC, ... TO 48"Carbon Steel Flange Type: Slip-On, Welding Neck, Blind, Socket Welding, Lap Joint,Threaded and Plate etc.Pressure Ratings: Class ...