1. Good hygiene performance. The raw material of the pipe is polyolefin, and its molecules are only composed of C and H elements. The raw and auxiliary materials fully meet the hygienic standards, and have good corrosion resistance. They have no chemical effect on all ions in the water and will not rust. Large-caliber water supply pipe

2. The pipeline resistance is small. The inner wall of the straight pipe is smooth and will not scale. The frictional resistance of the lead path is smaller than that of the box type pipe, the cross-sectional area of the pipe fittings does not change when the pipe fittings are connected, and the local resistance coefficient is smaller than that of the metal pipe.

3. The waste of pipes and fittings can be recycled. After being cleaned and crushed, the waste can be directly used for the production of pipes and fittings; there is no pollution to the environment during the production and construction process. It belongs to the color building materials.

4. Heat preservation and energy saving. The thermal conductivity of pp pipe material is 0.21 W/(mK), which is only 1/200 of that of steel pipes. Generally, when heat preservation is required for hot water pipes, the effect of overflow and energy saving is obvious; the expansion force generated when the degree of judging changes is also small. , Suitable for direct burial and concealing in embedded walls and floor surfaces.

5. The deficiencies of pp pipes: a. The rigidity and impact resistance are worse than metal pipes, so they are easily damaged during storage, transportation and construction. b. The linear expansion coefficient of pp pipes is relatively large, ranging from 0.14 mm/(m.K) to 0.16(m.K). Dark coating should be used. Technical measures must be taken to prevent expansion and deformation of the pipeline when exposed or non-direct-buried dark layout.

6. Good heat resistance and long service life. The high working temperature of pp pipe can reach 95℃, and the long-term use temperature is 70℃ under 1.0MPa pressure. It can meet the upper limit temperature of hot water supply. Under the working pressure of PN1.0MPa, the service life can reach more than 50 years: the service life can reach more than 100 years at normal temperature.

7. Easy installation and reliable connection. The pipe is not only simple in production process, less equipment investment, but also light in weight. The weight is only 1/9 of steel pipe and 1/10 of purple steel pipe, which reduces the construction intensity of workers; because the pipe material is processed by using various raw materials. It has a good hot-melt function, convenient and reliable installation, and the strength of the connection part is greater than that of the pipe wood body.