Concrete Pump Pipe for Concrete Delivery Material: 45Mn2 / 55Mn Wall Thickness: 4.5/ 5.0/ 7.0mm Length: 1m, 2m, 3m, or according to client’s requirements Complete with SK 148mm twin wall flange, HD, PM ZX 175mm, Schwing MF 166mm, Sany 157mm, Zoomlion ZX etc. Welding technique: automatic welding Surface Treatment: powder painted and baked Working Pressure: