... 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 ... Steel flanges ASTM A182 F1, F5a, F9, F11, F12, F22, F91(4) Connection Type: Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, ...