Explanation

It is used to eliminate the different outer diameters (the same piece or the same batch) during the rolling process of steel pipes, improve the outer diameter accuracy and straightness of hot-rolled finished pipes, and improve the external surface quality of steel pipes. The sizing process of steel pipe is a continuous rolling process of hollow body without mandrel. There are two types: multi stand (generally 3-7 stands) continuous longitudinal rolling type, and single stand skew rolling rotary sizing type (only applicable to medium and thick wall steel pipes).

Classification