SN12.5 wound carat pipe, selection of sewage pipe in the park

The sewage pipe network in the park has long withstood the static pressure of the covered soil and the dynamic load of the pavement, and the selection of pipe ring stiffness directly determines the life of the system. SN12.5 wound carat pipe, that is, HDPE wound reinforced pipe with ring stiffness of 12.5kN/m2, with the structural wall design, when buried under the general park roads and green belts, both stiffness and toughness are taken into account, making it a balanced choice.

The pipe is made of high-density polyethylene as a base material, and the outer convex reinforcing ribs are formed by a hot winding process to form a "T" or "Ω" ribbed pipe structure. The SN12.5 grade means that the pipe can withstand a load of 12.5 kN per square meter under 3% radial deformation, which is sufficient to cope with the earth pressure generated by the passage of light to medium-sized vehicles in the park. Compared with low-ring stiffness pipes, its compression break margin is higher, which can effectively resist the local stress concentration caused by the backfill.

When selecting the type, it is necessary to comprehensively evaluate the burial depth, groundwater level and foundation conditions. Usually, the buried depth of the main road of the park is between 1.5 and 4 meters, and the deformation rate can be easily controlled within 5% with SN12.5 combined with standard sand and gravel foundation and symmetrical backfill. In case of soft silt soil layer, only need to increase the compaction degree of the soil on the side of the pipe or replace it locally, and there is no need to blindly raise the ring stiffness level to achieve structural stability. This flexible bearing characteristic of "pipe-soil interaction" allows the SN12.5 solution to achieve a balance between cost and safety.

In terms of connection mode, the wound carat tube is mostly sealed with socket port and electric hot melt belt or rubber ring, and the interface has outstanding anti-settlement ability, which can adapt to the alternating soft and hard foundation of the park. The inner wall is smooth and does not scale, and the roughness coefficient is maintained for a long time. The risk of siltation under the self-cleaning flow rate is small, and the maintenance frequency is significantly reduced.

In addition, HDPE material is resistant to acid and alkali corrosion, and has good tolerance to weakly acidic production wastewater or domestic sewage that may be mixed in the park. The designed service life can reach 50 years. When selecting the type, as long as you check the corresponding table of ring stiffness and covering depth according to the current engineering technical regulations of buried plastic drainage pipes, the SN12.5 wound carat pipe can build a reliable and durable underground vein for the sewage discharge of the park.