schwing pump spare parts Specialized in concrete pump parts and spare parts,like delivery pipe,elbow,coupling,fitting schwing schwing pump spare partsThis is the brief ... or welded tube)material:45Mn2,high quality alloy steel pipe,st52,20#steel,etcsize:DN 125mm or DN 150mmWall thickness:4 ... . 2. elbow/bend and reducer elbowmaterial:Hi-Mn13,20#steel,st52,etcsize:DN 125mm or DN 150mm (R275,R225,R315 ...