... , EN, JB, GB, HG, UNI, API galvanized steel tube flang Technics: Forged Size: from 1/2 to ... Types Of Jointing Faces: raised face; ring joint face; tongue and groove face; male and ... female face; lapped joint; flat face; threaded Connection: Welding Varieties: Threaded ... Slip-On Flange (SO), Socket Welding Flange, Lap Joint Flange (LJF), Welding Neck Flange (WNF), Blind Flange ...