HDPE Carat Pipe for Reliable Performance in Cold Regions

In the northeast, northwest and other cold regions of our country, the low temperature in winter is like the "invisible killer" of pipeline engineering - the sudden drop in temperature will cause ordinary pipelines to become brittle and crack, and the external pressure caused by soil frost heaving will easily cause pipeline deformation. Once a failure occurs, maintenance will not only have to face the biting cold wind, but also may affect the lives of residents or industrial production. How to find a pipeline product that can "withstand and stabilize" under extreme low temperatures has become the core appeal of many engineering parties.

AD Pipe HDPE carat pipe is born to solve the pain points of pipelines in cold areas. As a wound structural wall pipe made of high-density polyethylene (HDPE), it is optimized for low-temperature environments from material to design: first, HDPE itself has excellent low-temperature brittleness - according to tests, AD HDPE carat pipes can still maintain good toughness at extreme temperatures of -40 ° C, and will not lose elasticity due to low temperatures like PVC pipes; secondly, the unique thermal winding process allows the pipeline to form a "multi-layer helical structure", which not only improves the ring stiffness (up to SN16), can effectively resist the extrusion of soil frost heave, but also enhances the impact resistance - even if it encounters heavy objects during winter construction, it is not easy to crack.

The case of a municipal drainage project in Heilongjiang best reflects this "frost resistance": the minimum temperature in the region in winter is -35 ° C, and the depth of the frozen layer exceeds 1.5 meters. Before, concrete pipes had to be repaired many times a year due to freezing cracking. After switching to AD HDPE carat pipes in 2021, they operated without failure for three consecutive winters. Master Li, who is in charge of maintenance, said: "In the past, it was necessary to wrap three layers of cotton clothes to check water leaks in winter. Now there is no need to worry about the pipes."

In addition to the material and structural advantages, the quality control of AD pipes is the "reliable" foundation of carat pipes. During production, HDPE resin that meets the GB/T 13663.2 standard is selected to avoid raw material impurities affecting the low temperature resistance; automated winding equipment ensures that each section of the pipeline has a uniform wall thickness and a tight structure; before leaving the factory, it must undergo a "low temperature impact test" - the sample is placed in a -40 ° C environment for 24 hours and then impacted with a heavy hammer, and no cracks are considered qualified.

In an industrial wastewater transportation project in an industrial park in Xinjiang, AD carat pipes also demonstrate the dual advantages of "corrosion resistance + frost resistance": the local winter temperature is -28 ° C, and the wastewater contains corrosive components. However, the HDPE material of carat pipes is both low temperature resistance and chemical corrosion resistance, and there has been no leakage or corrosion problems in operation for more than two years. The person in charge of the project said: "The choice of AD carat pipe is to see that it can solve the two problems of low temperature and corrosion at one time."

For engineers in cold regions, "reliable" pipeline means reducing maintenance costs and avoiding shutdown losses. The all-round optimization of AD pipeline HDPE carat pipe from material to process makes it a "safe choice" for pipeline engineering in cold regions - whether it is a cold winter of minus tens of degrees or a deep frozen soil, it can be as stable as Mount Tai, escorting municipal drainage, industrial transportation, residential water supply and other scenarios.