Seamless steel tube is a kind of strip steel with a hollow section and no surrounding joint.
Because seamless steel pipe has hollow section, it can be used as pipelines to convey oil, natural gas, coal gas, water and some solid materials.
Compared with solid steel tubes, in case of the same torsional strength, the weight of seamless steel pipe is lighter, so seamless steel pipe is a kind of economic section steel.
They are widely applied to the manufacture of structural parts and mechanical parts, such as the oil drill pipe, automobile transmission shaft, the bicycle frame and scaffold. Manufacturing circular parts such as rolling bearing ferrule with seamless steel tube can improve the utilization rate of material, simplify the manufacturing process, and save the material and working hours. They are widely used in industrial field.