welding neck flange1.Best quality & price flange 2.Size:15~600mm 3.Standard:ANSI;BS;DIN;ISO ... 4.Can do special design ProductFlange ,Steel flange,Carbon steel,welding neck flangeSize15mm ~ 600mmMaterialCarbon steel(20#,35#,45 ... .Product Description:High neck butt welding flange makes two pipes, fittings or equipments each fixed at a flange first, then put gasket in ...