Inferior structural steel pipe without metallic luster
Inferior structural steel pipe without metallic luster, pale red or similar color of pig iron, there are two two reasons, it is blank adobe...(2) Low-quality material manufacturers guide and guard .Inferior spiral steel cross ribs thin and low, often sufficient dissatisfaction phenomenon, because manufacturers to achieve large negative tolerance, finished the first few tracks reduction is too large, iron-type small, pass sufficient dissatisfaction.. Causes of poor quality DSAW steel pipe surface is easy to produce scarring of two things
Low-quality spiral steel material uneven impurities.(2) Low-quality material manufacturers guide and guard the poorly equipped, easy to stick steel, easy to produce these impurities bite roll scarring after. Inferior-rolling temperature is not standard, they are visually steel temperature, so can not be carried out according to the provisions of the austenitic region of rolling, the natural properties of the steel can not be reached.Scarring Causes of Inferior DSAW Steel Pipe Causes of poor quality DSAW steel pipe surface is easy to Scraper Reclaimer Wholesale produce scarring of two things:(1) Low-quality spiral steel material uneven impurities
