Jianlong Industry Sharing: The Nemesis of Underground Pipe Network Leakage, Research on the Sealing Reliability of PE Pipe Electric Fusion Connection Process

From the process principle, during the electric fusion connection, the electric fusion pipe fittings are put on the pipe, and the intelligent electric fusion welding machine accurately controls the voltage, current and welding time. When the current passes through the resistance wire, the heat is evenly transferred, and the polyethylene materials of the pipe and the pipe fittings gradually melt to form a continuous and dense welding interface. This process is like creating a "molecular bond" for the pipe and the pipe fittings, making the connection a whole, effectively avoiding the leakage channel. Actual test data shows that the breaking strength of a qualified electric fusion connection interface can reach more than 90% of the strength of the pipe body, and can maintain good sealing performance in the complex pressure and soil stress environment underground.

In the construction link, the electric fusion connection has strict requirements on the operation standardization, but it is also because of the standardized process that the sealing reliability is improved. Construction personnel need to clean the pipes and fittings to ensure that there are no impurities on the connection surface that affect the melting effect; accurately adjust the centering position of the electric fusion pipe fittings and the pipe to ensure uniform current distribution and balanced heat transfer. Nowadays, the application of intelligent electric fusion equipment allows the welding parameters to automatically adapt to the pipe specifications, further reduce human operation errors, and improve the consistency of connection quality. For example, in a certain city's old pipe network renovation project, after the PE pipe electric fusion connection process was adopted, the number of leakage points decreased by more than 70% compared with before the renovation, and the operation stability of the pipe network was significantly improved.

From the perspective of long-term use, the sealing reliability of the PE pipe electric fusion connection can stand the test of time. Polyethylene materials have good chemical stability, and the interface formed by the electric fusion connection is not prone to aging and cracking in the underground humid environment with chemical corrosion. At the same time, the interface of the electric fusion connection can be regularly checked for potential hidden dangers through non-destructive testing methods such as ultrasonic testing and resistance testing, and leakage problems can be prevented in advance, providing guarantees for the long-term safe operation of the underground pipe network.

It can be said that the PE pipe electric fusion connection process has become the "nemesis" of underground pipe network leakage with scientific principles, standardized construction and reliable long-term performance. It is playing an increasingly important role in the construction and operation of urban pipe networks, protecting the health and smoothness of the city's "blood vessels".