Introduction to 5083 seamless pipe

Hot rolling, cold drawing, hot expansion

According to different production methods, it can be divided into hot-rolled pipes, cold-rolled pipes, cold drawn pipes, extruded pipes, etc.

1.1. Hot rolled 5083 seamless pipes are generally produced on automatic pipe rolling mills. The solid tube blank is inspected and surface defects are removed, cut into the required length, centered on the end face of the tube blank perforation end, and then sent to the heating furnace for heating, and perforated on the perforation machine. During perforation, continuous rotation and advancement occur, and under the action of the rolling mill and the top, a cavity gradually forms inside the billet, known as a capillary. Then it is sent to the automatic pipe rolling machine to continue rolling. The entire machine has a uniform wall thickness after being homogenized, and the diameter is determined by a sizing machine to meet the specification requirements. The use of a continuous pipe rolling mill to produce hot-rolled 5083 seamless pipes is a more advanced method.

1.2. To obtain smaller and better quality 5083 seamless pipes, cold rolling, cold drawing, or a combination of both methods must be used. Cold rolling is usually carried out on a two roll rolling mill, where steel pipes are rolled in a circular pass formed by a variable cross-section circular groove and a fixed conical head. Cold drawing is usually carried out on single chain or double chain cold drawing machines with a capacity of 0.5-100T.

1.3. The extrusion method involves placing the heated tube blank in a closed extrusion cylinder, and the perforated rod moves together with the extrusion rod to extrude the extruded part from the smaller mold hole. This method can produce steel pipes with smaller diameters.