Different classification methods of seamless steel pipe

Seamless steel pipe is a long strip of steel with a hollow section and no joints around it. Compared with solid steel such as round steel, seamless steel pipe has lighter weight when the bending and torsion strength is the same.

Generally, according to different production methods (processes), 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, and top pipes.

According to the different cross-sectional shapes, seamless steel pipes can be divided into two types: round and special-shaped. Special-shaped seamless steel pipes generally have a variety of complex shapes such as square, oval, triangle, hexagon, melon seed, star, and finned pipe.

According to their different uses, seamless steel pipes can be divided into thick-walled seamless steel pipes and thin-walled seamless steel pipes.

Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

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