Seamless steel pipe

Seamless steel pipe is a steel pipe made of whole round steel perforated with no welds on the surface, which is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, top pipe and so on. According to the sectional shape, seamless steel pipe is divided into two kinds of round and shaped, and the shaped pipe has square, oval, triangle, hexagonal, melon, star, and a variety of complex shapes with finned pipe. The maximum diameter is up to 900mm, and the minimum diameter is 4mm. according to different applications, there are thick-walled seamless steel pipe and thin-walled seamless steel pipe. Seamless steel tubes are mainly used as oil geological drilling tubes, petrochemical cracking tubes, boiler tubes, bearing tubes, and high-precision structural steel tubes for automobiles, tractors and aviation.