Whether the PE pipe can be directly connected to the PPR pipe, what should be paid attention to?

In the installation and use of plastic pipes, there are often problems with the connection of pipes of different materials, among which the connection between PE pipe and PPR pipe is a more common situation. Many people will ask, can PE pipe be directly connected to PPR pipe? The answer is no, PE pipe and PPR pipe cannot be directly connected by hot melt. This is mainly determined by the material characteristics of the two pipes. The main component of PE pipe is polyethylene, while PPR pipe is random copolymer polypropylene, and their molecular structure, hot melt temperature and physical properties are significantly different. When directly connected by hot melt, the effective fusion between the molecules of the two materials cannot be achieved, resulting in weak connection and easy leakage and other safety hazards.

So, when it is necessary to connect the PE pipe with the PPR pipe, what method should be used? The most common and reliable way is to use the adapter joint, also known as the reducer direct or flange joint. The adapter joint is usually made of PE at one end and PPR at the other end, or a metal material (such as brass) is used as a transition, and the two ends are connected with the PE pipe and the PPR pipe by hot melt or wire buckle. When choosing the adapter joint, it is necessary to ensure that its specifications match the diameter of the PE pipe and the PPR pipe connected, and the product quality meets the relevant standards to ensure the stability and durability of the connection.

During the connection process, there are still some key precautions that need to be strictly observed. First of all, it is necessary to ensure that the end face of the pipeline connection is clean and free of oil, impurities and moisture, so as not to affect the hot melt or connection effect. Secondly, when cutting the pipeline, special pipe cutting tools should be used to ensure that the incision is flat and vertical, and to avoid burrs or skew, so as to fit closely with the adapter. For the part that is connected by hot melt (such as the PE end and the PE end of the adapter, or the PPR end and the PPR end of the adapter), it is necessary to strictly control the hot melt temperature and time according to the instructions of the pipe and the hot melt machine. Excessive temperature or too long heating time may lead to excessive melting of the pipe, blockage of the pipe or decrease in the strength of the connection. If the temperature is too low or the heating time is insufficient, the connection will not be tight, leaving a hidden danger of leakage

After the connection is completed, it should wait for the interface to be naturally cooled and solidified. Do not forcibly move or apply external force. In addition, during the entire installation process, the working pressure and use environment of the pipeline system should also be considered to ensure that the pressure level of the selected pipe material and adapter joint can meet the actual needs. After the installation is completed, it is recommended to carry out a system pressure test to check the sealing and reliability of the connection, and find and deal with possible problems in time.

In short, PE pipe and PPR pipe cannot be directly hot-melt butt, and must be connected through a suitable adapter joint. In the connection operation, strictly follow the standard construction process, pay attention to material selection, cleaning, cutting, hot-melt parameter control and post-inspection and other links, in order to effectively ensure the quality of pipeline connection and ensure the safe and stable operation of the entire pipeline system.