Plastic water pipes (PPR) are commonly used and are prone to leaks. Are people still using it widely?
At present, a large number of so-called PPR pipes on the market are made of modified plastic propylene, and the price of pipes is the key to the problem! Under the huge market pressure, most manufacturers have adopted unfair price competition means to meet the market demand and make great achievements at a disadvantage!
The plastic pipes are connected by hot melt. The connection method is not easy to control its temperature. If the temperature is too low, the connection is not firm and water leaks; if the temperature is too high, the plastic material will be seriously deteriorated and the connection will be brittle. Even if the temperature is well controlled, the plastic at the joint is actually equivalent to the second-use plastic after remelting, which is the weak point of the pipeline, and the pressure is relatively low, generally only allowed to use within the working pressure of 0.6mpa.
At the same time, the linear expansion coefficient of the plastic pipe is large (0.15mm/m°C), and technical measures must be taken to prevent the expansion and deformation of the pipe, and the coated pipe should be installed directly or not directly buried. When delivering hot water, at the interface.
