Ductile graphite pipes are made of magnesium or rare earth magnesium combined with gold spheroidizing agent added to the molten iron before casting to spheroidize the graphite and reduce stress concentration, making the pipe have the advantages of high strength, high elongation, impact resistance, corrosion resistance, and good sealing. ; The inner wall is lined with cement mortar, which improves the pipeline water delivery environment, increases water supply capacity, and reduces energy consumption; the pipe mouth adopts a flexible interface, and the pipe itself has a large elongation rate (>10%), making the pipe more flexible Well, in buried pipelines, it can work with the soil around the pipeline to improve the stress state of the pipeline, thereby improving the reliability of the pipeline network operation. Therefore, at present, my country's water supply industry usually uses ductile graphite pipes as the main material.

The emergence of ductile iron pipes provides a new type of pipe with excellent performance for my country's water supply industry. In order to better apply ductile iron pipes in projects, design and construction personnel should be familiar with the characteristics of ductile iron pipes, constantly find problems and solve them, make the design more reasonable and the construction more standardized, so that the new pipes can play a better role in water supply projects.