Seamless steel pipe set quota as follows:
Seamless steel pipe has a hollow cross-section, a large number of pipelines used for transporting fluids, such as pipelines for transporting petroleum, natural gas, coal gas, water and some solid materials. Compared with round steel and other solid steel, steel pipe is lighter in weight when the bending and torsion strength is the same, it is a kind of economic cross-section steel, widely used in the manufacture of structural and mechanical parts, such as oil drilling rods, automobile drive shafts, bicycle frames.