... ; ring joint face; tongue and groove face; male and female face; lapped joint; flat face; threaded Connection: WeldingVarieties: Threaded Flange, Slip-On 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 ...