Design Features
1. It has good flexibility, which makes it convenient and economical to lay. The produced pipes can be coiled and bent during construction to reduce the use of pipe fittings and reduce construction costs.
2. Low brittle cracking temperature. The pipe has excellent low-temperature resistance, so it can also be constructed in the case of low temperature in winter, and the pipe does not need to be preheated when bending.
3. Good chemical resistance and long service life;
4. Good environmental adaptability, lightweight, good flexibility, and can be supplied in coils;
5. Under the condition that the working temperature is 70 degrees Celsius and the pressure is 0.4MPa, it can be used safely for more than 50 years.
6. No toxic additives are added to the pipe during the production process. The inner wall is smooth, non-scaling, and does not breed bacteria, which can be safely used in drinking water transportation and other fields.
Scope of application
The application of PE-RT pipes in the field of cold and hot water pipes in buildings in my country has developed rapidly, and the raw materials have also further developed. In 2002, the industry-standard "heat-resistant polyethylene (PE-RT) piping system for hot and cold water" was released, but because the industry standard at that time was based on the German standard "heat-resistant polyethylene (PE-RT) piping - general quality requirements" " and "Heat Resistant Polyethylene (PE-RT) Pipes - Dimensions", both of which are based on the performance indicators of Type I PE-RT materials. With the development of materials, the performance indicators of type II PE-RT materials have been much higher than the first-generation materials, and the international standard ISO22391 "heat-resistant polyethylene (PE-RT) piping system for cold and hot water" has also been revised and updated. , adding requirements for Type II PE-RT piping. [1]
With the development of materials, PE-RT pipes have been updated and upgraded to PE-RT II pipes, which are divided into three types according to their comonomers:
1. Ethylene and octene copolymerization - heat-resistant polyethylene (C2+C8);
2. Ethylene and hexene copolymerization-heat-resistant polyethylene (C2+C6);
3. Heat-resistant polyethylene (C2+C4) copolymerized with ethylene and butene
The launched (PE-RT Ⅱ type pipe) material is suitable for industrial and civil building cold and hot water pipeline systems, drinking water systems, thermal embedded pipes, ground radiant heating systems, and high-temperature ground source heat pump systems, especially in northern applications. In the secondary pipe network of urban heating system - PE-RT II type prefabricated direct buried thermal insulation pipe.
