As a new type of pipe, PP-R pipe has the following performance characteristics:

1. The production energy consumption of energy-saving PP-R pipe is only 20% of that of steel pipe, and its thermal conductivity is low [0.2W/(m.K)], which is only 1/200 of that of steel pipe, which will be greatly reduced when applied to hot water systems. heat loss.

2. Corrosion-resistant, non-scaling, hygienic, and non-toxic The use of PP-R pipes can eliminate the "secondary pollution" of water quality caused by scaling and rusting of the inner wall caused by the use of galvanized steel pipes. Because PP-R is simple in composition, and its basic components are carbon and hydrogen, it conforms to food hygiene regulations, is non-toxic, and is more suitable for drinking water transportation.

3. Heat resistance, pressure resistance and long service life The long-term use temperature of PE/PRR pipe production line can reach 95℃, and the short-term use temperature can reach 120℃. Under the condition of using temperature of 70℃ and working pressure of 1.2MPa, it can be used continuously for a long time, and its service life can reach more than 50 years.

4. Light weight, high strength and small fluid resistance The density of PP-R pipe is only 1/8 of that of metal pipe, the pressure resistance test strength is as high as 5MPa, and it has good toughness and impact resistance. Due to the smooth inner wall, no rust and no scaling, the fluid resistance is small. The main technical indicators of PP-R pipe are as follows: density 0.9g/cm3 elastic modulus (20℃) 800MPa thermal expansion coefficient 1.8×10-4/K thermal conductivity 0.2W/(m.K) longitudinal shrinkage rate 2% impact Test breakage rate ≤ 10% hydraulic test short-term 1h, ring stress 16MPa no leakage long-term 95 ℃, 1000h, ring stress 3.5MPa no leakage Table 1 shows the performance comparison of several materials.

In addition to the general characteristics of plastic pipes, such as light weight, corrosion resistance, no scaling, and long service life, PP-R pipes also have the following main characteristics:

1. Non-toxic and hygienic. The raw material molecules of PP-R are only carbon and hydrogen elements, and there are no harmful and toxic elements. It is hygienic and reliable. It is not only used in hot and cold water pipes, but also in pure drinking water systems.

2. Heat preservation and energy saving. The thermal conductivity of PP-R pipe is 0.21w/mk, which is only 1/200 of that of steel pipe.

3. Good heat resistance. The Vicat softening point of the PP-R pipe is 131.5°C. The working temperature can reach 95℃, which can meet the use requirements of the hot water system in the building water supply and drainage code.

4. Long service life. The service life of PP-R pipe can reach more than 50 years under the condition of working temperature of 70℃ and working pressure (P.N) of 1.0MPa; the service life of PP-R pipe can reach more than 100 years at normal temperature (20℃).

5. Easy installation and firm connection. PP-R has good welding performance. The pipes and fittings can be connected by hot melt and electrofusion, which is easy to install, and the joints are firm. The strength of the connecting part is greater than the strength of the pipe itself.

6. Materials can be recycled. The PP-R waste is cleaned and crushed and then recycled for the production of pipes and fittings. The amount of recycled material does not exceed 10% of the total, which does not affect product quality.