How to distinguish the quality of seamless steel pipe

Seamless pipes have a hollow cross-section and are widely used as pipes for conveying fluids, such as pipes for conveying oil, natural gas, gas, water and certain solid materials (octg pipes).

To distinguish the advantages and disadvantages of seamless steel pipes, we can start from the following aspects:

1. Distinguish by checking the appearance. The surface of inferior seamless steel pipes is prone to scarring, which is mainly due to more impurities and uneven materials.

2. Dimensional accuracy. The inner and outer diameters of inferior small-diameter seamless steel pipes fluctuate too much. Some will also have partial wall phenomenon, and partial wall phenomenon is serious.

3. Fold. False and inferior steel pipes are prone to folding. Folding is a variety of fold lines formed on the surface of seamless steel pipes caused by manufacturers pursuing high efficiency. This defect usually runs through the entire product. The pitted surface, the surface is prone to scars and cracks, and it is even easy to scratch. It has no metallic luster, and the cross-section is oval. These defects have deeply disturbed us.

4. Materials. The composition of the steel is uneven, and the end face of the cut head is not smooth and neat.

In order to pursue high efficiency and profits, manufacturers of fake and inferior steel pipes have adopted various improper methods, such as cutting corners, using inferior billets, poor equipment, and adobe billets, etc. These problems have led to a decline in the quality of steel, which is prone to quality problems such as folding, pitting, scarring and cracks, and may even threaten people's lives. Therefore, we must carefully identify fake and inferior steel pipes

Article source: https://article-realm.com/article/Business/50538-How-to-distinguish-the-quality-of-seamless-steel-pipe.html