Manufacturing process of seamless steel pipe

Seamless steel pipe, as a high-performance pipe, is characterised by a continuous smooth surface without seams, which is made from a whole round steel directly pierced and refined through a number of processes. The production process is rigorous and efficient and consists of the following core steps:
Raw Material Preparation: High-quality round steel is selected as the billet, which is rigorously cut and cleaned to ensure that the material is pure and flawless, laying a solid foundation for subsequent processing.
Heating: Precisely control the temperature and time to heat the billet to enhance its plasticity, which is convenient for subsequent moulding and processing, and at the same time to avoid the occurrence of oxidation and decarburisation phenomenon.
Perforation: Using advanced perforation technology, the heated round steel is perforated into a preliminary tube, which is the key to seamless steel pipe forming.
Rolling and Extrusion: Through precision rolling or extrusion process, the size and shape of the tube are adjusted to meet the design requirements, ensuring that the inner and outer walls of the tube are smooth and the dimensions are accurate.
Sizing and cooling: further consolidate the dimensional accuracy and appearance quality of the steel tube through sizing treatment, followed by rapid cooling to prevent deformation or cracks caused by thermal stress.
Finishing process: This includes straightening, removal of head and tail remnants and surface cleaning to enhance the straightness and aesthetics of the steel pipe, as well as eliminating internal stresses to ensure product stability.
Seamless steel pipe is popular mainly due to the following advantages:
High strength and corrosion resistance: the selection of high-quality materials, combined with advanced technology, gives the steel pipe excellent mechanical properties and corrosion resistance, adapting to extreme working conditions.
Excellent sealing and safety: no weld design, eliminating the risk of leakage caused by interface defects, enhancing the reliability and safety of system operation.
High precision and finish: meet the needs of precision manufacturing, high surface finish, reduce fluid resistance and improve system efficiency.
Wide range of applications: covering a wide range of industries such as petroleum, chemical, natural gas, automotive, machinery manufacturing and aerospace, it is an indispensable industrial material.
To sum up, with its unique production process and significant advantages, seamless steel pipe plays an important role in various industries and becomes one of the indispensable pillar materials of modern industry.