Seamless steel pipes come in a wide variety of specifications, typically indicated by outer diameter, wall thickness, and length. The manufacturing processes include cold rolling and hot rolling, with cold-rolled pipes having a maximum nominal diameter of 200 mm, while hot-rolled pipes can reach up to 600 mm. Wall thickness ranges from very thin to relatively thick, and different standards and applications correspond to various specifications, requiring comprehensive consideration of multiple factors when selecting.

The control of the wall thickness of steel pipes is a difficult point in steel pipe production. The measures to improve the wall thickness accuracy in production mainly include the following aspects: