Yearly Archives: 2022

The seamless welded pipe production technology was invented in Germany, and the technology since then is mainly in Germany. The United States is a pioneer in the development of electric resistance wel...

Defects produced in the actual production of high-frequency welded pipes (erw steel pipe) are sometimes not caused by one reason, but are usually the result of a combination of multiple factors. Weldi...

Compared with traditional pipes, seamless steel pipes have lighter raw materials, high strength, good durability, can withstand higher internal pressure, are sensitive in production and use, and can b...

Recently, our company’s small partners often encountered customer feedback in the process of talking with customers. In their previous procurement experience, they often encountered the problem of cra...

The surface problem of seamless steel pipes is the most common one in the process of purchasing seamless steel pipes by all customers. We often encounter customers who conflict with downstream custome...

How much smoothness of the inner hole of the cold drawn seamless steel pipe can be achieved? This is mainly based on the customer's product requirements. In the field of hydraulic steel pipes, the inn...

Generally, the deformation of welded parts does not need to be corrected. Only when the post-weld deformation exceeds the technical requirements, it needs to be corrected. The welding deformation is m...

High-frequency straight seam steel pipe (ERW welded pipe) is based on the principle of electromagnetic induction and the skin effect, proximity effect and eddy current heating effect of electric charg...

In addition to the skin effect, the proximity effect is another feature of current. When alternating currents of equal magnitude and opposite directions pass through two adjacent conductors, the curre...

Dimensional tolerance defects, surface defects and straightness defects are common defects of welded pipes in the sizing section. 1. Dimensional tolerance defects The adjustment difficulty of the ...