Galvanized steel
Poor quality galvanized steel pipe is presented in a folded condition, and the surface of the folded galvanized steel pipe is the main reason for forming such a broken line. Such a defect will run through the entire length of the product. If such a folded plating is used Zinc steel pipe after bending there will be cracking, so the strength of steel is not.
Poor quality galvanized steel pipe will also appear on the surface of the appearance of Ma Ma, which can produce galvanized steel pipe manufacturers use different equipment produced by the production of surface irregularities and irregularities caused by poor quality Galvanized steel pipe tends to produce equipment exceeding the standard, so the surface will show the appearance of Ma surface.
Most of the low-quality galvanized steel pipe will be cracked on the surface, the reason is due to their billet is the use of soil culture, and soil culture stomata more so in the process of cooling soil culture, due to the effect of receiving thermal stress And the onset of cracks, which in the production of galvanized steel pipe will crack.