galvanized steel tube flang Size: from 1/2 to 200 ... EN, JB, GB, HG, UNI, API galvanized steel tube flang Technics: Forged Size: from 1/2 to 200 inch ... , Pad Type Flange, Loose Hubbed Flange, Welding Plate Flange, Welding Neck Collar, Welding-On Collar, Loose Plate Flange, Companion Flange ... Flange, Spectacle FLG8 (Spacer & Blanks), Square Flange, Long Welding Neck (LWN) and so on. Standards: Ansi B16.5, ...