Precision steel pipe is a kind of high precision steel pipe material after cold drawing or hot rolling. Due to the advantages of no oxide layer on the inner and outer walls of precision steel pipe, no leakage under high pressure, high precision, high finish, no deformation during cold bending, no expansion, flattening and no crack, it is mainly used to produce pneumatic or hydraulic components, such as air cylinder or oil cylinder, which can be seamless pipe or welded pipe.