The method of water leakage detection of fire protection pipes

Fire protection pipes are mostly buried underground, and due to operational age, pipe quality or construction problems, leaks inevitably occur in the pipes. In order to avoid digging out the entire pipeline when it leaks, the general line of leak detection, and then excavate the location of the leak for pipeline repair. At present, the more widely used for pipeline leak detection is the sound and hearing detection method.

1, with the pipeline leak detection company introduced by closing the main dry valve of the fire protection network, confirm the leak section, observe the ground to confirm the leak. Confirm that the valve can be closed completely, according to our experience, the domestic valve, especially after 1, 2 years after the installation of the valve, more than 70% are very difficult to close, the valve can be closed, you can confirm the approximate area of the leak.

Carefully check the state of the ground above the pipe in this area, there is no sinking, particularly wet, next to the sewer there is no stable clear water. This leak detection method is suitable for the general public, technical content is not high, but it is difficult to leak point, excavation area is large, but also easy to cause mis-excavation.

2, the use of professional pipe leak detector. In general, the basic detection method is, connect the pipe leak detector host, headphones, sensors. Turn on the switch, put on the headset, place the sensor on the road above the pipeline, place it step by step according to the length of the pace, step by step listening, the closer to the leak, the stronger the signal, the farther away from the leak the weaker the signal, by comparing the signal strength between different points to achieve the purpose of detecting leaks. Therefore, we use the pipeline leak detector, a single point in the leak signal is not meaningful, to repeatedly compare multiple points, compare the sound vibration of the larger place is the leak, of course, we have to consider many other additional factors, such as the direction of the leak breakage mouth, because the pipe is round, if the side of the leak, the larger point may instead be on the side of the road above the pipe, rather than The road above the pipeline, so the location of the pipeline to know, in addition to the tee, bend, water pressure, burial depth, buried layer, etc. will have an impact on the detection to take these into account.

3, pipe leak detection company introduced quiet time to listen to the sound. 2:00 a.m., late at night, when the surrounding area is very quiet, follow the pipeline slowly, if the leak is large, there is a certain probability of hearing the sound of water leakage.