Why do ppr pipes distinguish between cold water and hot water pipes

Cold and hot water pipes in home improvement are one of the necessary pipes. In the early days, when the PPR pipe brand and pipe technology were not perfect, people may not pay much attention to the fact that cold and hot water pipes are not one kind of pipes, but two kinds of pipes. There are fundamental differences between them in terms of material. At present, the cold water pipes generally used are PPB materials, and the hot water pipes are mainly PPR pipes. Let me introduce to you why ppr insulation pipes should distinguish between cold water and hot water pipes:

       As the main material of cold water pipes, PPB pipes are not only cheap but also strong. They are the best choice for cold water pipes, but why do you choose PPR pipes with higher performance?

       In the early days, PPB materials were used in hot water pipes. After using for a period of time (usually about 2-3 years in households), you will find that the pipes continue to experience irreversible thermal expansion, as well as bending and deformation of pipes. It may lead to the phenomenon of arching and cracking of the wall of the buried pipe. The service life is far less than the so-called 50-year service time of many manufacturers. The PPR pipe is not only used in the hot water pipe without affecting the appearance and performance of the pipe, but also has the performance of low temperature resistance, no cracking and smashing at minus 40 degrees, so it is also a good choice for cold water pipes, but the price is slightly higher than that of cold water pipes. expensive.

       PPB pipes for cold water pipes have some hot water problems that they cannot overcome. Although the impact strength of PPB materials is basically about 60KJ per square meter, while the impact strength of PPR materials is only about 30KJ per square meter, but with the continuous increase of ethylene content, the softening of PP materials The temperature is also constantly decreasing, resulting in the softening temperature under load of PPB materials is usually below 90 degrees Celsius.

       PPR pipe is one of the home improvement water supply pipes mainly researched and produced by major domestic brands. Its performance advantage is obvious in the application. And for the Vicat softening of PPR materials, its use temperature is basically above 130°C. Generally speaking, there is no obvious bending deformation phenomenon at all during the use of normal households, so everyone can Rest assured for long-term use.