Seamless steel pipes have good mechanical properties and are widely used in oil, natural gas, electric power, boilers, transportation of oil and natural gas, water, steam, gas, liquefied petroleum gas, etc. However, in some environments, the internal temperature of the seamless steel pipe is high, the moisture is large, the corrosion environment is harsh, and it is easy to rust, which is easy to cause property loss.

Mechanical properties are an important indicator to ensure the end-use performance of seamless steel pipes, which depend on the chemical composition and heat treatment system of the steel.

Stainless steel seamless pipe is a long strip of steel with a hollow section and no seams around it. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the higher its processing cost will be. The corrosion resistance of stainless steel seamless pipe is stronger than ordinary seamless pipe.

Seamless pipes have strict requirements on cavity cleanliness and wall thickness dimensional tolerances. However, during the whole process of electric welding, due to the action of molten metal material, the thickness of the pipe at the weld will increase, and the inside and outside of the weld will be uneven.

ERW welded pipe is made by using the skin effect and proximity effect of high-frequency current to rapidly heat the edge of the pipe to the welding temperature and then extrude and weld it.

Alloy pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe. Alloy pipes are divided into structural seamless pipes and high-pressure heat-resistant alloy pipes.