1. Rolling: The metal billet of large-diameter steel pipe passes through the gap between a pair of rotating rolls. Due to the compression of the roll, the material cross-section is reduced and the length is increased. This is the most commonly used production method for the production of large-diameter steel pipes. To produce large-diameter steel pipe profiles, plates, pipes. Divided into cold rolling and hot rolling.

2. Forging: a pressure processing method that uses the reciprocating impact force of the forging hammer or the pressure of the press to change the blank into the shape and size we need. It is generally divided into free forging and die forging, and is often used to produce large-sized materials, open billets and other steel pipes with large cross-sectional dimensions.

3. Drawing: It is a processing method of drawing the rolled metal blank through the die hole to reduce the cross section and increase the length. Mostly used for cold drawing.

4. Extrusion: It is a processing method that puts the metal in a closed extruding chamber and applies pressure at one end to extrude the metal from the specified die hole to obtain finished products of the same shape and size. Mostly used to produce non-ferrous metal large-diameter steel pipes.