How to identify the quality of seamless steel pipe?
Identifying the advantages and disadvantages of seamless steel pipes can be started from the following aspects:
Distinguish by examining the appearance. Poor quality seamless steel pipe surface prone to scarring, which is mainly due to more impurities, uneven material.
Dimensional accuracy. The inner and outer diameter of low-quality small-caliber seamless steel pipe fluctuates too much. Some will have the phenomenon of deviating wall, and the phenomenon of deviating wall is serious.
Shoddy steel pipes are prone to folding, which is a variety of folding lines formed on the surface of seamless steel pipes caused by the pursuit of high efficiency by manufacturers, and this defect usually runs through the entire product. The surface is pockmarked, the surface is prone to scars and cracks, and even easy to scratch, there is no metallic luster, and the cross-section is oval, and these defects have made us deeply uneasy.
The material. The composition of the steel is not uniform, and the end face of the cutting head is not smooth and neat.
In order to pursue high efficiency and profits, manufacturers of shoddy steel pipes have adopted various improper means, such as cutting corners, using inferior billets, simple equipment, billets are adobe and so on. These problems have led to a decline in the quality of steel, easy to produce folding, pocking, scarring and cracks and other quality problems, and may even threaten people's lives.
