... A105,ST37.2,20#,16Mn 3.Type:Flat, Slip-on,Bind ,Welding neck etc. LOOSE FLANGE1.Carbon steel flange with ... flange, pad type flange, loose hubbed flange, welding plate flange, welding neck collar, welding-on collar, loose plate flange, companion flange and so ... on.7.Standards: KS B1502, JIS B2203, KS B1503 ...