Scarring Causes of Inferior SSAW Steel Pipe

Causes of poor quality ssaw steel pipe surface is easy to produce scarring of two things:
(1) 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 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. Inferior steel pipe without metallic luster, pale red or similar color of pig iron, there are two two reasons, it is blank adobe. 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.