Production Method Of BS1387 Seamless Steel Pipe

The production method of the BS1387 Seamless Steel Pipe is roughly classified into a cross-rolling method (Mengnesmann method) and an extrusion method.

The cross-rolling method (Mennesmann method) first pierces the tube by a slanting roll and then extends it with a rolling mill. This method has a high production speed, but has high requirements on the workability of the tube blank, and is mainly suitable for the production of carbon steel and low alloy steel tubes.

For China Carbon Steel Pipe Factory, the extrusion method uses a piercing machine to perforate a tube blank or a steel ingot, and then extrudes it into a steel tube by an extruder. This method is less efficient than the cross-rolling method and is suitable for producing a high-strength alloy steel tube.

Both the cross-rolling method and the extrusion method must first heat the tube blank or the steel ingot, and the produced steel tube is called a hot rolled tube. Steel pipes produced by hot working can sometimes be cold worked as needed. There are two methods for cold working: one is cold drawing, which is to pull the steel pipe through the extruding die to make the steel pipe become thinner and longer; the other method is cold rolling, which is invented by the Menezmann brothers. The hot rolling mill is applied to the method in cold working. Cold working of seamless steel tubes can improve the dimensional accuracy and processing finish of steel pipes and improve the mechanical properties of materials.