Renovation of the old pipe network in cities and towns, replacement of cement pipe carat pipes

The urban underground pipe network is the life infra of the city, but a large number of cement pipes laid in the early stage are entering the aging period. Cement pipes have a large weight and are affected by sewage corrosion and foundation settlement for a long time. They are prone to problems such as interface dislocation, pipe cracking, and serious leakage, which not only cause groundwater pollution, but also may cause pavement collapse. In the renovation project of old pipe networks, the safe replacement of these hidden pipes has become a key part of improving urban resilience.

Carat pipe, that is, high-density polyethylene winding reinforced pipe, is becoming an ideal choice to replace cement pipe due to its outstanding engineering adaptability. It is formed by hot winding with high-quality polyethylene raw materials. The pipe itself has excellent chemical corrosion resistance and can resist the erosion of acid and alkali wastewater for a long time, which fundamentally solves the pain point that cement pipe is easily corroded. At the same time, the carat pipe adopts socket electrofusion connection or sealing ring flexible connection, and the interface is tight, which can realize zero leakage of the pipe network and effectively protect the surrounding water and soil environment.

At the construction level, the weight of the carat pipe is only about one-tenth of that of the cement pipe of the same specification, and it can be easily hoisted and docked without large lifting equipment, which greatly reduces the construction difficulty and safety risks. The pipe wall structure design is reasonable, the ring stiffness covers a wide range, and it can adapt to different burial depths and load requirements. Good flexibility allows the pipeline to deform synchronously with the slight settlement of the foundation, avoiding the danger of rigid interface fracture, and significantly improving the overall seismic resistance and uneven settlement resistance of the pipe network system.

In addition, the smooth inner wall makes the water flow resistance minimal, it is not easy to scale, and the long-term water transmission capacity is stable, which helps to reduce the energy consumption of the pumping station. From the perspective of the whole life cycle cost, the carat pipe solution to replace the cement pipe has obvious advantages in terms of construction efficiency, maintenance frequency, service life, etc., and is a reliable path to achieve high-quality renewal of the old pipe network. This alternative is being accelerated in various places to make the urban underground arteries safer and more durable.