Deep burial and heavy load scenarios, high ring stiffness carat tube procurement suggestions

Priority verification ring stiffness parameter matching degree

For scenarios such as municipal main roads, large logistics parks, and industrial zones with burial depths exceeding 3 meters and long-term heavy-duty vehicles above, the actual suitability of ring stiffness parameters should be confirmed when purchasing high-ring stiffness carat tubes. Do not just refer to the nominal value of the product, it is necessary to clarify that the parameters are ring stiffness under long-term static and hydraulic testing, rather than short-term test data, and select the corresponding grade based on the actual burial depth, geological softness, and upper dynamic load peak. Usually, the ring stiffness requirements for such scenarios are not lower than SN12.5. Areas with poor geological conditions need to be further upgraded to avoid extrusion deformation and cracking of pipelines in the later stage.

Key verification of structure and raw material properties

When purchasing, pay attention to check the overlap density of the structural wall of the carat tube to avoid the problem of excessive gap in the wall layer. At the same time, confirm that the raw material is new high-density polyethylene, and avoid products doped with a large amount of recycled material. If the proportion of recycled material is too high, the creep resistance and impact resistance of the pipeline will be reduced, and the service life of the deep buried heavy load environment will be significantly shortened. In addition, the corrosion resistance and elasticity of the matching sealing rubber ring should be checked simultaneously to avoid leakage of the later interface and raise the overall operation and maintenance cost.

Simultaneous consideration of construction and operation and maintenance costs

Purchasing high-ring stiffness carat pipes should not only compare single-meter quotations, but also comprehensively consider the full-cycle cost. Preferentially choosing products with longer single-section lengths can reduce the number of on-site interfaces, which not only reduces the risk of leakage, but also speeds up the construction progress and reduces labor and hoisting costs. At the same time, it is necessary to confirm that the supplier can provide supporting construction technical guidance and pressure test support to reduce the probability of errors in on-site construction, ensure that the actual service life of the pipeline matches the design life of the project of 50 years, and reduce the additional cost of pipe network replacement in the later stage.

Overall, the procurement of carat tubes under deep burial and heavy loading scenarios should be based on actual working conditions, multi-dimensional verification of product performance, and avoid the follow-up safety hazards caused by the blind pursuit of low prices.