Comparative analysis of whether to choose carat pipe or corrugated pipe for buried drainage pipe

Core performance parameter comparison

The core performance of buried drainage pipes directly determines the service life. Carat pipes belong to high-density polyethylene wound structural wall pipes. They have a large ring stiffness grade span and can cover the SN4 to SN16 range. They have outstanding resistance to uneven settlement and corrosion. The normal buried service life can reach more than 50 years, and the high temperature and low temperature performance is stable. They are suitable for both north and south regions. Double-wall corrugated pipes are mostly made of high-density polyethylene or polyvinyl chloride. The ring stiffness is mostly concentrated in the SN4 to SN8 range. The impact resistance is weaker than that of carat pipes. They are prone to brittle cracking in low temperature environments. They are limited in use in low temperature areas or high fill sections in the north.

Construction and operation and maintenance cost differences

The adaptability of the construction link is an important reference for type selection. Carat pipes are mostly electrically heated flexible connections, which have strong interface sealing and can adapt to a certain degree of foundation settlement. The probability of water leakage is extremely low. The requirements for trench backfilling are relatively loose, which can reduce the cost of trench treatment in the early stage. However, the procurement cost of the pipe itself is relatively high, which is more suitable for permanent projects with long-term use. Bellows are lighter in weight and faster in installation. The procurement cost is only 60% to 70% of the same ring stiffness carat pipe. However, rubber rings are mostly used for socket connection. The sealing performance of the interface is greatly affected by settlement. After long-term use, the risk of water leakage is high, and the operation and maintenance costs of dredging and leak repair in the later stage will increase significantly.

Applicable scenario selection reference

When selecting the type, it should be matched according to the actual needs of the project. For scenarios with high pipeline performance requirements such as municipal main roads, high fill areas, soft soil foundation sections, and chemical industry parks, carat pipes should be preferred to reduce the probability of later failure. In scenarios such as internal drainage branch pipes, buried pipes under non-motor vehicle roads, temporary drainage projects, and ordinary municipal branch pipes with stable geological conditions, corrugated pipes can be selected to meet the needs of use and control the early investment of the project.

In actual selection, there is no need to pursue high performance blindly, nor can it reduce standards in order to reduce costs. By considering the geological conditions, load grades, and budget of the project, the most suitable buried drainage pipe can be selected.