1, Compared with metal pipe, PP-R pipe has low hardness and poor rigidity. It should be protected during transportation and construction to avoid mechanical damage caused by improper external force. Under concealment to mark the location of the pipe, so as not to damage the second renovation pipeline.
2, PP-R pipe below 5 ℃ there is a certain low temperature brittleness, winter construction should be careful, when cutting with a sharp knife to slow cutting. Can not be installed on the pipeline pressure, percussion, if necessary, vulnerable to external parts covered with protective objects.
3, PP-R tube long-term degradation by ultraviolet light degradation, installation outdoors or in direct sunlight must be bandaged dark protective layer.
4, PP-R pipe in addition to the metal pipe or water connection using threaded inserts or flanges and other mechanical connections, the rest should be used hot melt connection, the pipeline integration, no leakage point.
5, PP-R pipe larger linear expansion coefficient (0.15mm / m ℃), installed or unburied buried pvc pipe must be taken to prevent the pipe expansion and deformation of the technical measures.
6, after the installation of the pipe in the sealing (direct burial) and cover the decorative layer (non-buried Buried secret) must be pressure test. Cold water pressure test pressure of 1.5 times the system working pressure, but not less than 1MPa; hot water pipe test pressure of 2 times the working pressure, but not less than 1.5MPa. Test pressure time and method of technical regulations .
7, PP-R pipe or non-buried Buried buried pvc pipe, it must be installed in accordance with the provisions of hangers.
8, cooling to the prescribed time , to complete the connection.