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PP-R pipe, is used in most works as a water supply pipeline. PPR of the interface using hot-melt technology, fully integrated into the tubes between together, so once installed pressure test, will never again leakage, high reliability. But this is not to say that PPR is not defective plumbing pipes, high temperature and pressure of more, long-term temperature can not exceed 70 ℃; limited the length of each, and can not bend construction, if the laying of pipelines or long distance Corner, is used in the construction of large joints; pipe fittings cheap but relatively high prices. From the comprehensive performance speaking, PPR is the price of higher pipe, water pipes become the first choice of materials. PPR market sales of the two main colors, white and gray, why have this distinction, dealers say, PPR raw materials used by the different particles. Water and electricity in general the transformation of the original water pipes will be replaced,companies and businesses in the proposed renovation of the PPR are installed at all of the optional hot water, even if cold water is flowing through the place with hot water pipe. They say is due to the hot water pipe is higher than that of the technical parameters of cold water, and little price difference, so use the sea of hot water pipe. Another fact is, even if you want to buy cold water on the market find it difficult to buy, because the only cold water should be tooling market, not supply market.
what is the PP-R pipe??? PP-R called the three types of polypropylene, used by the PP-R out of a pipe, injection into the tube. Europe is the early 1990s, the development and application of new plastic pipe products. PP-R is the end of the 1980s, the use of gas copolymerization of the PE of around 5% of the PP in the chain of random elements uniform polymerization (-R) and a new generation of pipeline material. It has good resistance to impact and long-term creep properties.
PP-R pipe in the construction of the installation should pay attention to what issues ? 1, PP-R hardness of the metal tube lower than the rigid poor, in transport, construction should be protected to avoid undue mechanical damage caused by external force. Deposited in the dark after the pipeline to mark locations so as not to damage the decoration secondary pipeline. 2, PP-R of 5 ℃ below a certain low temperature brittle, to beware of winter, when use of sharp cutting tool slow cutting. Has been installed on the pipeline can not be pressure, percussion and, if necessary, to cover the protection of vulnerable sites outside of. 3, PP-R of the long-term exposure to UV-degradation of the aging, installed in outdoor or direct sunlight must be packed in the dark protective layer. 4, PP-R Pipe Fittings with the addition of water or metal tube for use with connecting thread inserts, such as mechanical or flange connection, the other hot-melt shall be used for connecting to pipeline integration, no leakage points. 5, PP-R linear expansion coefficient of the larger (0.15 mm / m ℃), or buried in the dark deposited with the cloth to be taken to prevent deformation of the pipeline expansion of technical measures. 6, after the installation of pipelines in the closure of the (buried) and covered with decorative layer (non-buried secret Kurashiki) before pressure test. Pressure cold water pressure test of the system working pressure of 1.5 times, but not less than 10 MPa; test pressure of the water pressure to work two times, but not less than 1.5 MPa. Pressure test of time and method provides technical point of order. 7, PP-R pipe of the Kurashiki or buried secretly deposited the cloth, with the installation must be in accordance with the regulations, hanger.
