Rust of Inferior Thick-walled Seamless Steel Pipe

1. Inferior thick-walled seamless steel pipe prone to folding. Folding is thick-walled seamless steel pipe surface formed by a variety of polyline, this defect is often throughout the product's vertical. The cause of folding is due to the pursuit of high efficiency shoddy manufacturers, the amount of pressure is too large, resulting in ears, the next rolling to produce a fold, folded products will break after bending, thick-walled seamless steel pipe strength decreased.

2. Inferior thick-walled seamless steel pipe surface often have pockmark surface phenomenon. Pockmark is due to groove wear caused by serious thick-walled seamless steel pipe surface irregular irregularities of the defects. As the inferior thick-walled seamless steel pipe manufacturers to pursue profits, rolling groove rolling is often the most excessive.

3. Thick-walled seamless steel pipe surface prone to scarring. There are two reasons: 1. Fake thick-walled seamless steel pipe material is uneven, many impurities. 2. Inferior material manufacturers guiding poorly equipped, easy sticky steel, these impurities bite the roll is easy to produce scarring.