Concrete Pump Spare Parts ST52 Pipe Tube Concrete Pump, Seamless Pipe, Condition Length 3m/6m/9m/12m, Application: Stationary Pump/Mobile Pump Concrete Pump Spare Parts ST52 Pipe Tube 1.Product Description ST52 pipe material is usually 16Mn,we have pipe and deck pipe, it is popular in the world, for example in Pakistan, Malaysia, Singarpore, Vitnam, Germany, Korea and so on countries. About the thickness, we have 4.5mm , 5.0mm,7.1mm, service life is 25000cbm-30000cbm. Hardness is 62HRC-65HRC, we exported the 5" size pipe. It is used on many different kinds of concrete pump, Putzmeister, schwing, sany, zoomline, and so on .