Features of Ductile Iron Pipe

Ductile iron pipe is a type of cast iron pipe. In terms of quality, the nodularization level of cast iron pipes is required to be controlled to be grade 1-3 (nodularization rate > 80%), so the finished product warehouse of mechanical nodular cast iron pipes of the material itself can be better improved, with the essence of iron and the properties of steel. performance. The metallographic structure of the annealed ductile iron pipe is ferrite and a small amount of pearlite, which has good mechanical properties, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, and is mainly used for water supply and gas transmission in municipal, industrial and mining enterprises. , oil transportation, etc. There is a certain amount of spherical graphite distributed on the ferrite and pearlite matrix. According to the different nominal diameter and elongation requirements, the proportion of ferrite and pearlite in the matrix structure is different, and the proportion of small diameter pearlite is different. Generally not more than 20%, and the large diameter is generally controlled at about 25%.