Seamless steel pipe is made of steel bar and it be produced by piercing steel bar. Seamless steel pipe is mainly used for petroleum geological drill pipe, oil chemical industry with cracking of the pipe, boiler furnace tube, bearing and automobile, tractor, and aviation with high precision steel tube structure. Seamless steel pipe USES a wide range. Seamless steel pipe is hollow section, a large number of used for conveying fluid pipe, such as oil, natural gas, coal gas, water and some solid materials, such as pipelines. 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.