Buried water carat tube SN8 SN10 SN12.5 Applicable scenarios

Due to its corrosion resistance, good interface sealing, and long service life, carat pipes for buried drainage are currently the mainstream pipes for municipal and civil drainage projects. Ring stiffness is the core indicator for measuring their resistance to external pressure. The SN8, SN10, and SN12.5 grades commonly used in the market have obvious differences in application scenarios. Choosing the right grade can not only ensure the safety of pipeline network operation, but also control project costs.

Applicable scenarios for SN8-grade carat tubes

SN8 grade refers to the carat pipe that can withstand an external pressure load of 8 kN per square meter, and is suitable for non-heavy-duty areas with a buried depth of no more than 3 meters. Common application scenarios include branch pipes for rain and sewage diversion renovation in old residential areas, drainage pipe networks in landscaping areas, supporting drainage pipes under urban branch roads, and drainage projects in suburban villages and towns with good backfill conditions and no long-term heavy-duty vehicles. This grade of carat pipe has outstanding cost performance and relatively loose requirements for backfill compaction during construction. It is suitable for small drainage projects with limited budgets and simple load conditions.

Applicable Scenarios of SN10 Carat Tube

The ring stiffness of SN10-grade carat pipe is 10kN/m2, which can adapt to the requirement of burial depth of 3-5 meters, and is the mainstream grade of current municipal projects. Its anti-deformation ability is better than SN8, and it is suitable for drainage trunk pipes under urban secondary arteries, ordinary production wastewater discharge pipe networks in industrial parks, sewage interception trunk pipes in river treatment projects, and internal drainage pipes in factories, commercial and residential areas that pass through medium-sized freight vehicles. This grade comprehensively balances cost and performance, and can cope with the drainage needs of most conventional geological conditions. Later operation and maintenance failure rates are low.

Applicable scenarios for SN12.5 carat tubes

SN12.5 grade is a gear with relatively high resistance to external pressure among the three commonly used grades. It can meet the burial depth requirements of 5-8 meters and is suitable for key projects with high loads and complex geology. Common application scenarios include drainage trunk pipes under urban trunk roads and expressways, drainage pipe networks in high-frequency traffic areas of heavy-duty vehicles such as ports and logistics parks, as well as drainage projects in soft soil areas with high groundwater level and weak soil bearing capacity and collapsed loess areas. The procurement cost of this grade of pipes is slightly higher than that of the first two grades, but it has outstanding resistance to settlement and deformation. It can greatly reduce the maintenance cost of pipe network leakage and collapse in the later stage. It is suitable for key livelihood projects with high requirements for drainage system stability.

In addition to referring to the ring stiffness grade when selecting the type, it is also necessary to comprehensively judge the actual buried depth, geological conditions, and ground load of the project. During construction, backfill compaction is done in strict accordance with the requirements of the code, so as to maximize the performance advantages of the carat tube and prolong the service life of the drainage pipe network.