Seamless steel pipe is a hollow section, no seams around the strip steel. Seamless steel pipe is hollow section, a large number of used for conveying fluid pipe, steel pipe and round steel, compared to solid steel in the 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, bicycle frame and construction of steel scaffolding is used.

Seamless steel tube USES a wide range. General-purpose seamless steel tube by ordinary carbon structural steel and low alloy steel or alloy structural steel rolling, most production, mainly used for conveying fluid pipe or structural components. . 2, is divided into three categories according to utility supply: a, according to the chemical composition and mechanical properties of supply; B, according to the machine