Seamless steel pipe
May 07,2025
A steel pipe made of a single piece of metal without any seams on its surface is called a seamless steel pipe. According to the production method, seamless pipes are classified into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, and jacking pipes, etc. According to the cross-sectional shape, seamless steel pipes are divided into two types: round and special-shaped. Special-shaped pipes come in various complex shapes such as square, oval, triangular, hexagonal, melon seed-shaped, star-shaped, and finned pipes. The maximum diameter reaches 650mm and the minimum diameter is 0.3mm. Depending on the use, there are thick wall and thin wall tube. Seamless steel pipes are mainly used as oil and gas geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, as well as high-precision structural steel pipes for automobiles, tractors and aviation.
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