How to detect the quality of ductile iron pipe is a topic of discussion, along with the rapid urbanization process, water pipe network on the need for ductile iron pipe more and more, when the purchase of ductile iron pipe, according to which to judge the quality of ductile iron pipe? Here are their six Suggestions:

1, ductile iron pipe easy to show expansion. Expansion is the ductile iron pipe exterior composition of a variety of curves, this kind of defects often throughout the vertical;

2, poor quality ductile iron pipe surface often has a pockmarked condition. The dimpled surface is caused by the damage of the groove, which causes the uneven appearance of the ductile iron pipe. Because of the poor quality ductile iron pipe manufacturers to pursue profit, often show groove cold rolling beyond the standard;

3, poor quality ductile iron pipe appearance is easy to cause scab;

4, the appearance of inferior material is easy to cause cracks, the reason is that its blank material is adobe, adobe has many air holes, adobe in the whole process of refrigeration because of the effect of welding stress, resulting in cracks, after cold rolling will have cracks;

5, poor quality ductile iron pipe scratch at will, the reason is that poor quality material manufacturers rough machinery and equipment, easy to cause burr, scratch the appearance of ductile iron pipe. Deep scratch reduces the compressive strength of ductile iron pipe;

6, poor quality ductile iron pipe no l texture, dark red or similar to the color of pig iron. If you have been in the purchase do not know how to buy, use these six points, it is not easy to buy poor quality ductile.