Matters needing attention in installation and construction of PP-R pipe

1. Compared with metal pipes, PP-R pipes have lower hardness and lower rigidity. They should be protected during handling and construction to avoid mechanical damage caused by inappropriate external forces. Mark the location of the pipeline after the dark application to avoid damage to the pipeline during the second decoration.

     2. There is a certain low temperature brittleness of PP-R pipe below 5℃. Be careful in winter construction and use a sharp knife to cut the pipe slowly. Do not place heavy pressure or knock on the installed pipeline, and cover the parts vulnerable to external forces with protective materials if necessary.

     3. The PP-R tube is prone to aging and degradation when exposed to ultraviolet rays for a long time. It must be covered with a dark protective layer when installed outdoors or in direct sunlight.

     4. Except for the mechanical connection methods such as threaded inserts or flanges used to connect PP-R pipes with metal pipes or water appliances, the rest should be connected by hot melt, so that the pipeline is integrated and there is no leakage point.

     5. The linear expansion coefficient of the PP-R pipe is relatively large (0.15mm/m℃), and technical measures must be taken to prevent the expansion and deformation of the pipe when the pipe is exposed or not directly buried.

     6. After the pipeline is installed, the pressure must be tested before sealing the pipe (direct burying) and covering the decorative layer (non-direct burying dark application). The test pressure of the cold water pipe is 1.5 times the working pressure of the system, but not less than 10MPa; the test pressure of the hot water pipe is 2 times the working pressure, but not less than 1.5MPa. Pressure test time and method technical regulations stipulate.

     7. When the PP-R tube is open or not directly buried, the support and hanger must be installed according to the regulations. PPR tube integrates human body aesthetics and traditional Chinese aesthetics. It is produced by one-time molding with top international raw materials, and has four unique reinforcing ribs for safe care.