galvanized steel tube flang Size: from 1/2 to 200 inch (DN15-DN6000) ... , BS, JIS, EN, JB, GB, HG, UNI, API galvanized steel tube flang Technics: Forged Size: from 1/2 to 200 inch ... Neck Flange (WNF), Blind Flange, Orifice Flange, Reducing Flange, Pad Type Flange, Loose Hubbed Flange, Welding Plate Flange, Welding Neck Collar ...