Industrial Blog

If you’ve been running an ERW tube mill for a while, this probably sounds familiar.

The pipes come out looking clean. Surface looks good. Everything seems fine—until you take a closer look at the weld seam.

That’s usually where the trouble begins.

No matter how good the galvanized strip is, the welding process itself changes things. The zinc layer at the seam doesn’t stay intact. And once that protection is gone, the risk of rust goes up quickly.

Left untreated, it’s only a matter of time before corrosion shows up—and spreads.

In this article, we’ll go through what’s really happening at the weld seam, why some common solutions don’t work as well as expected, and a more practical way many factories are now using to deal with it.

This article is aimed to discuss and solve a misunderstanding in tube mill procurement — the excessive pursuit of All Round Machine. Through analyzing a customer case, we will reveal a hidden cost trap behind “ a big machine for small pipes ” and provide investors with a scientific, economical equipment and production planing strategy , realizing return on investment to the greatest extent. 

High frequency pipe making machine , which is called tube mill, is a crucial part of industrial equipment intended to make steel pipes from steel coils. These machines are widely used in industries, including construction, oil and gas, automotive, furniture, energy, and infrastructure.