... ,ST37.2,20#,16Mn 3.Type:Flat, Slip-on,Bind ,Welding neck etc LOOSE FLANGE(1) Flanges Type: Plate Flange, Flat ... Flange, Slip on Flange, Welding Neck Flange, Long Welding Neck Flange, Blind Flange, Socket Welding Flange, Thread Flange, Screwed Flange, Lap Joint Flange ...