Manufacturing principle of seamless steel pipe (SMLS):
1. Basic manufacturing process of seamless steel pipe
The basic manufacturing process of seamless steel pipe is divided into several main processes: billet heating, rolling into pipe, cooling, grinding, inspection, packaging and so on. Among them, billet heating is a key step in the manufacture of seamless steel pipes, the purpose of which is to heat the billet to an appropriate temperature so that it becomes easy to deform, thereby facilitating rolling into a tube shape. Heating usually adopts high-frequency induction heating or flame heating, and its temperature control is also very important. After being rolled into a tube, it goes through cooling, grinding, inspection and other links, and finally it is packaged before leaving the factory.
2. Process principle of seamless steel pipe manufacturing
The process principle of seamless steel pipe manufacturing is to use the physical deformation of the billet during the heating and rolling process to form a seamless pipe shape. Heating changes the internal structure of the billet, reduces the external stress and hardness, and makes it easy to deform; during rolling, the billet is forced to deform by forming tools to make it present the required shape characteristics, and finally form Seamless steel pipe. Compared with welded steel pipes, seamless steel pipes have the advantages of smooth and defect-free surfaces, accurate dimensions, and excellent mechanical properties, so they are widely used in petroleum, chemical, machinery, aviation, shipbuilding and other industrial fields.
3. Application advantages of seamless steel pipe
The application advantages of seamless steel pipe mainly lie in its smooth surface without defects and excellent mechanical properties. Compared with welded steel pipes
, seamless steel pipes have higher connection strength and better pressure resistance, and their seamlessness also makes them more accurate and reliable in transportation and flow control. In the fields of petroleum, chemical industry, machinery, aviation, shipbuilding, etc., seamless steel pipe is a necessary pipe material and has broad application prospects.
As an important steel product, the seamless steel pipe is manufactured on the principle of utilizing the physical deformation of the billet during heating and rolling to form a seamless pipe shape. Compared with welded steel pipes, seamless steel pipes have the advantages of smooth and defect-free surfaces, accurate dimensions, and excellent mechanical properties, and are widely used in industrial fields.
What grade is carbon steel seamless pipe?
Typical carbon steel pipe material grades in API 5L Grade B, X42 to X70, ASTM A106 B, ASTM A53 B, ASTM A252 Grade 3 and ASTM A333 Grade 6 etc. PMC offers various of carbon steel pipes including seamless, welded (ERW EFW, LSAW, SSAW) steel pipes for the mining industries.