The bends of the pump are made of seamless steel tube, and cast steel, good is cast steel inside to fit gold block.

The pipe is used as a conduit for conveying fluids, such as pipes for oil, gas, gas, water and certain solid materials. Compared to the steel pipe and round steel solid steel bending torsional strength phase at the same time, the weight is lighter, is a kind of economic cross section steel, widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, used in the construction of steel scaffolding with steel pipe manufacturing annular parts, such as can improve material utilization, simplifying the manufacturing process, material saving and processing time, has been widely used to make steel pipe.

Pump truck bend pipe production technology can be divided into cold drawing and hot rolling, concrete pump truck pipe production process generally more complicated than hot rolled, tube billet to three roller rolling in the first place, after the extrusion sizing test, if there is no response after the crack surface pipe have to be cut after cutting machine, cutting grow about a meter of billet. And then enter the annealing process, annealing with acid pickling liquid, pickling when should pay attention to whether there is a lot of bubble surface, if there is a lot of bubbles show that the quality of the steel tube can not meet the corresponding standards. Appearance of concrete pump truck pipe bending is shorter in hot rolled seamless steel tube, concrete pump truck pipe wall thickness of the generally smaller than hot rolled seamless steel tube, but the surface looks brighter than the thick wall seamless steel tube, not a lot of rough surface, the diameter is not a lot of burr.