1. Performance comparison between ductile iron pipe and general cast iron pipe:

The production process of ductile iron pipes is to add magnesium, calcium and other alkaline earth metals or rare metals to the raw materials of ordinary cast iron pipes. The casting process of ductile iron pipes includes continuous casting method, hot mold casting method and water-cooled centrifugal casting method. Among them, the water-cooling method is the most advanced technology in the world today, and the technical performance of ductile iron in different processes

Compared with ordinary cast iron pipes, it not only maintains the corrosion resistance of ordinary cast iron pipes, but also has the advantages of high strength, good toughness, thin wall, light weight, impact resistance, large bending performance, and convenient installation. Therefore, ductile iron pipes are not only widely used abroad, but also widely used in China. In many areas of our country, ductile iron pipes have been widely used in medium and small diameter water supply pipes;

2. Performance comparison between ductile iron pipe and steel pipe:

Steel pipes can be divided into seamed steel pipes and seamless steel pipes, and seamed pipes are generally used in the middle of water supply pipes. Compared with ductile iron pipes, steel pipes have the advantages of good toughness, high tensile strength, thin pipe walls, high pressure resistance, long pipes, and fewer joints. The biggest disadvantage is poor corrosion resistance and high price. Therefore, in general, except for small-diameter pipelines and special projects, such as pipe jacking projects;

3. Performance comparison between ductile iron pipe and prestressed reinforced concrete pipe:

Ductile iron pipes and prestressed reinforced concrete pipes (suitable for large-diameter pipes, with a maximum diameter exceeding 2000), have the following characteristics:

(1) To save energy, the main materials are sand and stone, which can be obtained locally.

(2) Heavy weight, brittle texture, difficult cutting and relatively difficult construction.

(3) The working pressure is 2o%-40% lower than that of the ductile ink tube, which is 0.15-0.25MPa.

(4) The maximum deflection angle is 1.5 degrees, while the ductile iron pipe can reach a maximum of 3.0 degrees, so the terrain adaptability of the prestressed reinforced concrete pipe is poor.

4. Performance comparison between ductile iron pipe and PVC plastic pipe:

Compared with ductile iron pipes, PVC pipes are characterized by smooth inner wall, light weight, corrosion resistance, good anti-scaling performance, and low price, but there are many disadvantages, mainly as follows:

(1) It is easy to age, expands with heat and contracts with cold, so it should not be exposed to sunlight for a long time, and the storage room temperature should not be greater than 40°C.

(2) Low strength, poor compressive performance, improper construction can easily cause deformation.

(3) The rigidity is poor, the flexibility is poor, and it is easy to cause mouth leakage.