How to adjust the protruding length of the observation hole of PE electrofusion pipe fittings after welding, how long is the best? In the case of a certain wall thickness of the PE pipe fittings, it can be adjusted by the layout depth of the resistance wire, and the protruding length of the observation hole can also reflect the quality of the wiring situation on the side. If it appears too long, it means that the wiring is too deep, and if it is too short, it means that the wiring is too shallow. What is the cause of short circuit and bumping during welding of electrofusion PE pipe fittings, and how to prevent it? The main reason is that the positioning of the pipe in the pipe fitting is not correct: the insertion depth is not in place, and the axial direction is not aligned; or there is a large deviation in the size matching of the pipe and the pipe fitting, such as the out-of-roundness of the pipe is seriously exceeding the standard. In addition, it may be due to the presence of moisture in the connection between the electrofusion pipe fitting and the pipe material or the excessive heating time, so that the two resistance wires are in contact when swimming inside the pipe fitting, or the resistance wire is oxidized when the exposed wiring pipe fitting is used, or the resistance wire is inserted when the resistance wire is inserted. Ribbon out, improper selection of resistance wire, partial carbonization caused by instantaneous heating and short circuit. Before welding, the debris on the surface of the pipe fittings and the PE pipe should be cleaned, the oxide layer on the surface of the pipe should be scraped off, and the pipe fittings with embedded wiring should be used, and welded in strict accordance with the process.
