1. Good hygienic performance. The raw material of pipes belongs to polyolefin, and its molecules are only composed of C and H elements. The raw and auxiliary materials fully meet the hygienic standards, have good corrosion resistance, and have no chemical effect on all ions in water and will not rust.
2. Small pipeline resistance. The inner wall of the straight pipe is smooth and will not scale. The friction resistance of the lead path is smaller than that of the box pipe, the cross-sectional area remains small 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 pipe fittings can be recycled. After cleaning and crushing, the waste can be directly used to produce pipes and pipe fittings; No pollution to the environment during production and construction It belongs to edge color building materials.
4. Heat preservation and energy saving. The thermal conductivity of PPR pipe material is 0.21 w / (m.k), which is only 1 / 200 of that of steel pipe. Generally, when thermal insulation is required for hot water pipeline, the effect of overflow protection and energy saving is obvious; The expansion force generated when the Ju degree changes is also small, which is suitable for direct burial and concealed laying in the wall and floor surface layer.
5. Deficiencies of PPR pipes: A. rigidity and impact resistance are worse than metal pipes, so they are easy to be damaged during storage, transportation and construction. b. The linear expansion coefficient of PPR pipe is large, ranging from 0.14 mm / (m.k) ~ 0.16 (m.k). It is advisable to use concealed laying. Technical measures to prevent pipe expansion and deformation must be taken when exposed installation or non directly buried concealed layout.
6. Good heat resistance and long service life. PPR pipe is of high grade, and the working temperature can reach 95 ℃. Under the pressure of 1.0MPa, the long-term service temperature is 70 ℃ Meet the upper limit temperature of hot water supply. Working pressure PN1 Under the condition of 0mpa, the service life can reach more than 50 years; under normal temperature, the service life can reach more than 100 years.
7. Convenient installation and reliable connection. The production process is simple, the equipment investment is small, and the quality is light. The weight is only 1 / 9 of that of steel pipe and 1 / 10 of that of purple steel pipe, which reduces the construction intensity of workers; As the pipe material is processed and manufactured with three kinds of raw materials. It has good hot-melt function, convenient and reliable installation, and the strength of the connecting part is greater than that of the pipe wood body.
