News - Ductile Iron Pipe: The Mainstay of Modern Pipeline Systems

Ductile Iron Pipe, is made of cast iron as the base material. Before pouring, magnesium or rare earth magnesium and other spheroidizing agents are added to the molten iron to spheroidize the graphite, and then the pipe is produced through a series of complex processes. The uniqueness of ductile iron is that most or all of the precipitated graphite is in spherical form, and this structural characteristic greatly improves the performance of the material. After annealing, the metallographic structure of Black Iron Tube is ferrite plus a small amount of pearlite, and the mechanical properties are good.

The development history of Ductile Iron Tube is full of innovation and breakthroughs. In the late 1980s and early 1990s, facing the blockade of foreign centrifugal ductile iron pipe production technology and harsh patent authorization conditions, the 2672nd Factory of the Chinese People's Liberation Army (the predecessor of Xinxing Casting Pipe) bravely took on the task of independent research and development. In 1993, the first centrifugal ductile iron pipe in China was successfully rolled off the production line, marking that my country has achieved a leap from scratch in this field, and it took only eight years to complete the 40-year development process of Western countries. Today, Xinxing Casting Pipe has developed into the world's largest and most powerful centrifugal ductile iron pipe manufacturer, and has also participated in the formulation of world cast pipe standards, continuously promoting the development of the ductile iron pipe industry.

Ductile Iron Pipes Have a Variety of Performance Characteristics

1. High Strength and Good Toughness: Ductile iron pipes have high strength, and their strength is significantly improved compared to ordinary cast iron pipes. Because graphite is distributed in a spherical shape, the splitting effect on the matrix is reduced, making the pipe less likely to break when subjected to greater pressure and impact. At the same time, it also has good toughness, with an elongation generally greater than 10%, and can adapt to ground subsidence, soil movement and other situations to a certain extent. It is not easy to be damaged by deformation, which improves the reliability of pipe network operation.

2. Strong Corrosion Resistance: Through a variety of anti-corrosion treatment processes, such as asphalt paint coating, cement mortar lining, epoxy coal tar coating, epoxy ceramic lining, aluminate cement coating, sulfate cement coating and polyurethane coating, ductile iron pipes can effectively resist corrosion from different media. Whether it is used to transport gas, tap water, or for sewage discharge, it can maintain stable performance in various complex environments, extend the service life of the pipeline, and reduce maintenance costs.
3. Good Sealing: The pipe mouth adopts a flexible interface, which can adapt to displacement and deformation within a certain range, form a good sealing effect at the pipe connection part, and effectively prevent fluid leakage. At the same time, the high-precision manufacturing process of the pipe itself ensures the matching accuracy of the socket, further improves the sealing performance, and ensures the safe operation of the pipeline system.
4. Easy Installation: Compared with some other pipes, the weight of ductile iron pipes is relatively moderate, and the installation process is relatively simple. Its flexible interface facilitates the construction personnel to carry out the connection operation, reducing the installation time and labor intensity. At the construction site, the installation of pipelines can be completed quickly without complex equipment and professional technicians, which greatly shortens the project cycle and improves construction efficiency.
5. Good Antifreeze Performance: In cold areas, the antifreeze performance of pipelines is crucial. Ductile iron pipes have a certain degree of antifreeze. As long as it is not an extremely harsh environment, there will be basically no freezing cracks and bursts. This makes it widely used in water supply, heating and other pipeline systems in cold northern regions, providing reliable services for residents and enterprises.

Ductile Iron Water Pipe have become an indispensable and important pipe material in modern infrastructure construction with their excellent performance characteristics. From urban water supply and drainage to gas transmission, from industrial production to water conservancy projects, ductile iron pipes play a key role in various fields and have made important contributions to ensuring people's quality of life and promoting economic development. With the continuous advancement and innovation of technology, the performance of ductile iron pipes will continue to improve, and the scope of application will be further expanded. They will continue to shine in future infrastructure construction.