Identification method of fake and inferior seamless steel pipe products
Shoddy seamless steel pipe products are prone to folding. Folding is a variety of fold lines formed on the surface of steel pipes, and this defect often runs through the longitudinal direction of the entire product. The reason for the folding of the seamless steel pipe products is that the manufacturer pursues high efficiency, and the reduction is too large, resulting in ears, which will be folded in the next rolling process, and the folded product will crack after bending, and its strength will decrease.
The appearance of fake and inferior seamless steel pipe products often has pockmarks. Pockmarked surface is the defect of irregular unevenness on the surface of the steel pipe due to serious wear of the rolling groove. Because manufacturers of fake and inferior seamless steel pipe products want to pursue profits, it often happens that the groove rolling exceeds the standard. the
The surface of fake and inferior seamless steel pipe is prone to scarring. There are two reasons. One is that the material of fake and inferior steel pipes is uneven and there are many impurities. Secondly, the processing equipment of fake and inferior seamless steel pipe products manufacturers is simple and easy to stick to steel. These impurities are prone to scarring after biting the roll.