PE-RT Type II prefabricated direct-buried insulated pipe is an innovative piping solution specifically developed for secondary networks in urban district heating systems. With its core advantages, it is becoming an ideal alternative to traditional insulated steel pipe systems. The material boasts excellent corrosion and aging resistance, with a design service life of up to 50 years-more than three times that of standard steel pipes-thereby significantly reducing lifecycle maintenance and replacement costs. In terms of energy efficiency, the carrier pipe's thermal conductivity is merely one-300th that of steel pipe; combined with a high-density polyurethane insulation layer, it achieves a temperature drop of less than 0.1°C per kilometer and limits heat network losses to as low as 2%, delivering outstanding energy-saving performance. Furthermore, the pipe features a tightly bonded three-layer structure that effectively seals out air and moisture, ensuring superior corrosion resistance alongside excellent low-temperature toughness and impact resistance, allowing it to withstand harsh temperatures ranging from -40°C to 110°C. Regarding construction and cost, the pipe is lightweight and utilizes reliable heat-fusion joints; direct-buried installation eliminates the need for masonry trenches, reducing earthwork volume by over 50% and cutting construction time by more than half, resulting in an estimated 4.2% reduction in total project costs. Additionally, the smooth inner wall prevents scaling, ensuring the cleanliness and hygiene of the transported water over the long term. In summary, the PE-RT Type II prefabricated direct-buried insulated pipe combines longevity, high energy efficiency, ease of installation, and cost-effectiveness; it aligns perfectly with national green, low-carbon development goals and serves as a reliable solution for enhancing the safety and efficiency of district heating networks.