1. material: steel/stainless steel 2. process: forge,cast 3.size: ... 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 Carbon steel, alloy steel, stainless ...