What Is The Principle of Seamless Steel Pipe Extrusion

Seamless steel pipe extrusion is a commonly used pipe-making process, mainly used to produce seamless steel pipes of various specifications and materials. The principle is as follows:
1. Material selection: First, select appropriate steel billets as raw materials. These steel billets are usually preheated to improve the plasticity during extrusion.
2. Heating: The steel billet is heated to a certain temperature, which can reduce the tensile strength of the steel, increase the ductility, and facilitate extrusion forming.
3. Extrusion: The heated steel billet is placed in the extruder. Through the pressure of the extruder, the steel billet is extruded and deformed in the mold and gradually forms a tube shape.
4. Cooling: The extruded steel pipe is cooled through cooling equipment to solidify its shape.
5. Subsequent processing: The extruded seamless steel pipe may require subsequent processing, such as grinding, straightening, pickling, etc., to ensure its dimensional accuracy and surface quality.

The advantage of seamless steel pipe extrusion is that it can produce seamless steel pipes with high dimensional accuracy, smooth surface, and no joints between the inner and outer walls. It is suitable for fields that require high precision and high strength, such as petroleum, chemical industry, machinery manufacturing, and other industries.