1. material: steel/stainless steel 2. process: forge,cast 3. ... On, Welding Neck flange, Blind flange, Socket Welding flange, Threaded flange, Lap Joint flange and Plate flange, Orifice flange, Ring joint flange, Screwed Boss Flange, etc. Applicable standard ... GB, ASME , ANSI, MSS ,JIS , DIN , EN, BS, and customers' drawings for special use;Material ...