A seamless steel pipe is crafted from a single, unbroken piece of metal, devoid of any surface seams. Depending on the manufacturing process employed, seamless pipes can be categorized into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, and forged (top) pipes, among others. In terms of cross-sectional shape, seamless steel pipes fall into two main categories: those with a circular cross-section and those with an irregular cross-section, with the latter including shapes like square and elliptical. The diameter range of these pipes spans from a maximum of 650mm down to a minimum of 0.3mm. Seamless steel pipes find extensive applications, primarily serving as drilling pipes for petroleum geology, cracking pipes in the petrochemical sector, boiler pipes, bearing pipes, as well as high-precision structural steel pipes for automobiles, tractors, and aviation.