Thick wall seamless steel pipe is used to transport liquid and powdered solid, energy, manufacturing machinery parts and household utensils, stainless steel sheet is also a kind of economic development, it has a thick wall seamless steel pipe seamless splicing and seam with thick wall seamless steel tube, the parting with thick-walled seamless steel pipe and straight seam thick-walled seamless steel pipe and spiral seam welded steel pipe two kinds.
1. Fake thick wall seamless steel pipe is easy to expand, expand is thick wall seamless steel pipe surface produced by a variety of curves, this kind of shortcomings usually around the vertical of all products.
2. Counterfeit thick seamless steel pipe surface is easy to cause scab, pay attention to the material asymmetry, residue;
Equipment is simple, very easy to stick steel, this residue bite hot rolled strip easily cause scab.
3. The surface layer of inferior material is easy to cause cracks, because its embryo material is clay brick, which has many air vents. Because of the effect of internal stress, the clay brick causes cracks in the whole process of refrigeration, and there will be cracks after cold rolling.
4. There are often surface conditions on the surface of counterfeit thick wall seamless steel pipes.
The surface is caused by the serious abrasion of the rolling groove, which causes the irregular convex and concave defects of the surface of the stainless steel plate, and it is also very easy to scratch.
