galvanized steel tube flang Size: from 1/2 to 200 inch ( ... : ANSI, DIN, BS, JIS, EN, JB, GB, HG, UNI, API galvanized steel tube flang Technics: Forged Size: from 1/2 to ... ; threaded Connection: Welding Varieties: Threaded Flange, Slip-On Flange (SO), Socket Welding Flange, Lap Joint Flange (LJF), Welding Neck Flange (WNF ...