The operating temperature of PE-RT hot water pipes is not fixed, but varies based on specific application and long-term operating conditions that guarantee a 50-year design service life. Its safe and stable operating temperature is usually 70°C. This feature makes it widely suitable for Class 4 and Class 5 floor radiant heating systems, as well as conventional hot water delivery scenarios. Judging from the temperature resistance limit of the material, the pipe can withstand high temperatures of 95°C for a long time. Some type II products using advanced polymerization technology can even withstand temperature shocks of up to 100°C under short-term faults or instantaneous impact conditions. At the same time, PE-RT pipes inherit the excellent low-temperature toughness of polyethylene materials, and their low-temperature resistance can reach -40°C, ensuring the safety of construction and transportation in severe cold environments in winter. What needs special emphasis is that PE-RT stands for heat-resistant polyethylene. It is a special material specially developed for hot water transportation. Its comprehensive performance far exceeds that of ordinary PE pipes that are only suitable for cold water conditions below 45°C. In actual engineering applications, temperature and pressure have a close negative correlation. As the operating temperature increases, the pressure-bearing capacity of the pipe will decrease significantly. Therefore, pressure derating standards must be strictly followed when operating in high-temperature ranges. In addition, there are differences in the high-temperature performance of PE-RT Type I and Type II products on the market. Type II pipes have a more stable molecular structure and better long-term heat creep resistance, and can be used in scenarios such as urban central heating secondary pipe networks with higher requirements. In view of the fact that the specific parameters of pipes of different brands and different batches are different, before selecting materials for project design and on-site construction, be sure to read and follow the technical specifications attached to the specific products in detail to ensure the safety and reliability of the long-term operation of the system.