Views: 1 Author: Site Editor Publish Time: 2020-09-21 Origin: Site
Seamless steel pipes are very common. Commonly used seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, and are mainly used as pipelines or structural parts for conveying fluids. According to different uses, it can be divided into three types of supply: according to chemical composition and mechanical performance; according to mechanical performance; according to hydraulic test.
If it is used to accept liquid pressure, the water pressure test should also be stopped. Seamless pipes for special purposes include seamless pipes for boilers, chemical and electric power, seamless steel pipes for geology, and seamless pipes for petroleum. Seamless steel pipes have a hollow section and are used in large quantities as pipelines for conveying fluids, such as pipelines for conveying petroleum, natural gas, coal gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe is lighter in flexural and torsional strength and is an economical section steel.
It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are used to make ring parts, which can increase the application rate of data, simplify the manufacturing process, and save data and processing. Working hours have been generally made of steel pipes. The production process of ordinary seamless steel pipes can be divided into two types: cold drawing and hot rolling.
The production process of cold-rolled seamless steel pipe is generally more complicated than that of hot rolling. The tube blank must first stop three-roll continuous rolling, and then the sizing test must be stopped after extrusion. If the surface does not respond to cracks, the round tube must be cut by a cutting machine. Cut blanks about one meter in length. Then enter the annealing process. The acidic liquid should be used to stop pickling during annealing. Pay attention to whether there is a lot of blistering on the surface during pickling. If there is a lot of blistering, it means that the quality of the steel pipe does not meet the corresponding specifications.