Views: 22 Author: Site Editor Publish Time: 2022-04-13 Origin: Site
Since there is running water delivered by underground pipes, it does not take long to have water leakage problems, and it will be found that there may not be signs on the surface when the leakage occurs, and even if water seeps out from the surface, the seepage point may not be the leakage point, especially when the ground is covered with cement and other covering layers. The following describes the underground pipe leakage detection method for your reference, I hope it will be helpful to you.
1、Inquire about the leakage situation
Before the leak detection starts, we need to know to ask about the leak situation and the leak area. Instead of looking blindly. From the customer's mouth we can get a lot of water leakage information; this will help us a lot in the next step of leak testing.
Before the home leak detection work is carried out, we must first determine one thing, that is, whether the pipe is really leaking, how to determine the pipe leakage, we usually have to carry out pressure-holding test to determine whether the water pipe is leaking. There are various methods of pressure-holding tests.
2.1, turn off all the water in the house, observe whether the water meter is moving, moving, indicating that there are suspicions of leakage. Water meter does not move, indicating that the suspicion of leakage is small, but can not be 100% sure that there is no leakage (for example: the water meter does not move, and the downstairs tenants reflect that there is a leak on the roof of his house), there may be other factors not caused by the pipeline leakage.
2.2. Close the main valve of the inlet pipe, and then close all the taps and angle valves in the house, and then remove a tap for pressure (generally 8-10 kg pressure). If possible, it is best to remove all faucets in the house, with a plug plug (to avoid damage to the faucet), with special attention to the water heater must be removed from the inlet pipe. Pressure measurement, the pressure of the pipe mouth to try to stay away from the leaky area, to avoid interference with the pressure noise. (Note: there are also some cases can be directly from the water heater into the water pipe for pressure testing).
2.3, in general, first pressurize the cold water pipe, if the cold water pipe through the pressure test does not leak, you also need to pressure test the hot water pipe to see if the hot water pipe leaks.
2.4、After pressurizing the pipe, according to the length of time to see if the pressure is dropped, and if the pressure is dropped, it can be determined that the pipe is suspected of leaking. There are two situations that are more common.
2.5、 general leakage is the house downstairs occupants first found, you can observe the speed of leakage downstairs, under normal circumstances upstairs pressure drop speed and downstairs leakage speed is proportional, if the upstairs pipe pressure drop speed is very slow, while the downstairs leakage is very large, it means that it is not the upstairs pressure pipe leakage, but other causes.
When pressure testing, first use the pressurizer for water pressure testing, observe whether the pipeline leaks, determine the pipeline leaks and then change the air pressure, and then use the leak detector for testing.
Exclude the owner's water pipeline does not exist after the leakage, we need to understand the location of the owner's home pipeline and the direction of the situation, to check whether the leakage.
How can we understand the location of the owner's pipes? General ways are.
3.1, looking for the owner to provide the pipeline laying drawings during renovation.
3.2、If there is no drawing, you can also determine the direction of the pipe through the pipe locator
After determining the pipeline leak and know the direction of the pipeline, you can start to investigate the work, focusing on pipeline exposure, spigot, tee, elbow and other places to see if there are abnormalities to find the area of the leak.
The use of pipeline leak detector in the investigation.
After investigating the suspected leak area, you can start to use pipeline leak detector for detection (not all cases can be investigated to the suspected leak area through auxiliary methods, in the case of no investigation, it is necessary to conduct a comprehensive inspection of the house pipeline).
After confirming a leak, the first step is to conduct a preliminary inspection. Narrow down the detection area, you can check the rainwater wells, sewage wells, sewers, etc. near the pipes. In these places, see if there is open water flowing out. Narrow this leak detection area by this method. After the scope is narrowed to find such anomalies, you can take out the pipeline leak detector to detect along the top of the pipe.
Because, the water leaking out of the pipeline must have a place to leak out, either down the sewer well, or out of the ground, etc. By this method of elimination, a lot of work can be reduced.
When the instrument reaches the location of the leak point, the sound inside the headset will increase, and the sound will decrease after passing the leak point, or use the positioning mode to distinguish by the height of the column bar, the closer the leak point, the higher the column bar, the place with the loud sound and the highest column bar, for the suspected leak point.
Through the pipeline leak detector method of detection, drilling verification, after confirming that there is no error, excavation, repair and restoration.