Underground heating pipelines are one of the crucial infrastructures in modern cities, and they carry the task of transporting heat energy to provide warmth and comfort for the residents and industries in the cities. However, the frequent occurrence of heating pipeline leakage problems has brought serious hidden dangers and impacts on city operation and residents' lives. Before exploring the root causes of this problem, we need to have an in-depth understanding of the main causes of underground heating line leakage so that effective measures can be taken to prevent and solve this challenge.
1. Pipe network aging: long-time operation makes the internal corrosion of heating pipelines gradually intensify, and the wall of the pipeline thins, increasing the risk of leakage.
2. Failure of civil structures: Damage to the waterproofing layer of civil structures around underground pipes leads to infiltration of external water sources into the pipes, accelerating corrosion and equipment damage. Possible external water sources include standing water in the surrounding green areas, rainwater, road washout, sewage or water mains leakage, etc.
3. Welding quality problems: Pipe welds have welding defects such as slag, porosity or unevenness, making the pipe joints prone to leakage.
4. construction errors: municipal or housing construction, the construction party did not contact the pipeline management unit in advance, did not consult the drawings or site survey, resulting in mistakenly smashed, mistakenly dug heat pipeline, resulting in damage and fracture of pipeline equipment.
5. Insulation is not tight: direct burial pipeline insulation interface leakage problems, external water infiltration leads to pipeline corrosion, increasing the possibility of leakage.
6. Construction quality problems: the construction unit did not operate according to the regulations, the end of the directly buried pipeline did not do shrinkage end cap, the interface did not do shrinkage band or foam treatment, not set up a flexible pipe through the wall, etc., resulting in pipeline thermal insulation failure and damage, increasing the risk of leakage.
How to find out the leakage point of underground heating pipeline?
You can use water pipe detector to find out the leakage point, water pipe detector its working principle is pressure water pipe leakage pressure water from the pipe broken mouth rushed out, and the pipe wall friction produced by the sound vibration and other additional vibration caused by the pipeline above the ground, with the instrument in the road surface detection, to find out the leakage point.
Generally speaking, the basic detection method is to connect the water pipe detector host, headphones, sensors. Turn on the switch, wear a good headset, in the pipeline above the road surface placed sensor, according to the pace of the length of the step-by-step placement, step by step listening, the closer to the leak, the stronger the signal, the farther away from the leak the weaker the signal, through the comparison of the signal strength between different points to achieve the purpose of detecting leaks. Therefore, when we use water pipe detector, it is meaningless to listen to the leakage signal at a single point, we have to compare it with many points repeatedly, and compare the place where the sound vibration is bigger is the leakage point.
In response to the leakage of underground heating pipelines, it is necessary to comprehensively consider the operating life of the pipeline, civil engineering structure, construction quality and other aspects of the factors. Only by strengthening management and maintenance and improving the durability and safety of pipelines can we ensure the stable operation of urban heating systems and guarantee the normal life of residents and industrial production. At the same time, the progress of science and technology also provides new means and techniques for pipeline safety monitoring, we can use advanced pipeline leakage detector and other equipment, timely detection and solution of potential problems, for the development of the city and the well-being of the residents to make greater contributions.
