How to Distinguish High-quality Seamless Steel Pipe from Inferior Seamless Steel Pipe

In the daily steel procurement, the most annoying annoyance is nothing more than the purchase of inferior seamless steel pipes, thus affecting product quality. How to identify inferior seamless steel pipe? Let's take a look at the methods that can identify high-quality seamless steel pipes and inferior seamless steel pipes with the naked eye:

First, the surface of inferior seamless steel pipe is prone to scarring.

This is mainly due to two reasons:

(1), poor quality seamless steel pipe impurities more, uneven material.

(2), poor quality pipe manufacturers guide equipment is simple, especially easy to stick steel, containing impurities in the pipe bite into the roll is easy to produce scarring.

Second, the poor quality seamless steel pipe is prone to pipe folding.

The so-called folding is a variety of broken lines formed on the surface of seamless steel pipes, and this defect often runs through the longitudinal side of the entire product. The reason for folding is that in order to increase production and pursue high efficiency, the amount of pressure in the production process is too large, and the ear is generated, which is easy to fold in the next rolling process. The folded product is easy to crack after bending, resulting in a great decrease in the strength of the pipe.