1. Folding stainless steel tube

The anti‑corrosion steel pipe is easy to break. Bends are various fold lines formed on the surface of stainless steel pipes, usually throughout the product. Due to the excessive pursuit of high efficiency by the manufacturer, the depressing pressure is too large, resulting in the formation of pressure bends in the pipeline, and the bend is formed during the next rolling, the product will crack, and the strength of the stainless steel pipe will be significantly reduced. There will be pits on the surface of the stainless steel pipe. The rollers are severely worn, resulting in an irregular and uneven surface of the stainless steel.

2. Scar of stainless steel welded pipe

There are two reasons why the surface of stainless steel pipes is prone to scarring. First, the material of the inferior stainless steel welded pipe is uneven and there are many impurities. Poor quality stainless steel welded pipe manufacturers have poor sanitary equipment and are easy to stick to steel. These impurities are easy to scar after biting the roll.

3. Cracking of stainless steel welded pipe

Due to the influence of thermal stress, the surface of the inferior stainless steel welded pipe is prone to cracks, with many billets and many pores, and cracks will occur during cooling.

4. Surface of stainless steel pipe

Inferior stainless steel pipes have no metallic luster on the surface, and will appear light red or a color similar to pig iron. There are two reasons, one is that the billet is adobe. The second is that the rolling temperature of the inferior steel pipe is not standardized, and the steel temperature cannot be rolled according to the specified austenite area, and the performance of the stainless steel pipe is naturally unqualified.

Because the manufacturers of low‑quality stainless steel welded pipes have simple equipment, it is easy to produce burrs and scratch the surface of the steel plate. Welded pipe transverse bars are of poor quality, poor quality, and poor quality, and dissatisfaction often occurs. Because the manufacturer wants to achieve a large negative tolerance, the first few passes of the finished product are too large, the iron shape is too small, and the hole shape is unsatisfactory.

Inferior stainless steel pipes have an oval cross‑section because the manufacturer has a high pressure on the first two rolls to save material.

The above is the relevant information on how to identify inferior stainless steel welded pipes, I hope it can be helpful to everyone.