A - Seamless Pipe

Seamless steel pipe is a steel pipe made by piercing a whole round steel without any welds on the surface, which is called seamless steel pipe. According to production methods, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold drawn seamless steel pipes, extruded seamless steel pipes, top pipes, etc. According to the cross-sectional shape, seamless steel pipes are divided into two types: circular and irregular. Irregular pipes have complex shapes such as square, elliptical, triangular, hexagonal, melon seed, star, and finned pipes. The maximum diameter is 900mm, and the minimum diameter is 4mm. According to different uses, there are thick walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used for petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, as well as high-precision structural steel pipes for automobiles, tractors, and aviation.