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How to detect underground fire pipe leakage, fire pipe leakage detection method

Views: 253     Author: pqwt     Publish Time: 2022-07-26      Origin: PQWT

Small communities, schools, units, and factory buildings have fire protection pipeline networks, but buried fire protection pipeline networks will inevitably occur after a long period of time, the leakage of fire protection pipeline networks will cause a great waste of water, if the fire protection pipeline network is closed to avoid waste at the same time will also bring great security risks.

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Why do underground fire pipes leak?


China's underground fire protection pipe network, pipe is mainly steel pipe, buried in the ground for a long time, the pipe network natural aging, rust, inevitably will produce a lot of dark leaks; In addition, recently there are a small number of fire protection pipe network using PE class pipe, because PE class pipe on the connection technology requirements are higher, the pipe connection is also more likely to crack, resulting in leakage. Other factors such as geological changes, external corrosion and external pressure can also cause leaks in the network. Nowadays, there are many leaks in the new pipe network, and there are various reasons, such as construction mishaps, heavy pressure, etc., which may cause damage to the pipe network.


What are the main methods of fire leakage detection?


A. Confirm the leakage section by closing the main stem valve of the fire protection pipe network, and observe the ground to confirm the leakage point.


Confirm that the valve can be closed completely, according to our experience, domestic valves, especially after 1,2 years of installation, more than 70% of the valves are 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 pinpoint the leak point, excavation area is large, but also easy to cause mis-excavation.


B. Listen to the sound when it's quiet


At 2:00 a.m., late at night, when the surrounding area is very quiet, follow the pipeline slowly, if the amount of water leakage, there is a certain probability of hearing the sound of leaks.


For shallow burial, the leak of a large amount of water leakage is useful.


C. Use professional sound leak detector


This is generally only professional leak detection companies are equipped with professional instruments, listen to the sound rod and listen to the leak instrument in the same way, experienced leak detection personnel use them to pinpoint part of the leak, buried at a depth of about 1.5 meters, the leak is not very large in the case can also play a role.

 pipeline leak detection

Heating business leak detection is currently mainly used by the leak detector, leak detector, or called pressure pipe leak tester is better, the principle is "when a leak, the pressure water from the pipe crack outward injection, due to the pressure water and the friction between the rupture gap between the pipe mouth and the vibration will cause injection noise. It will spread along the pipe to both sides and spread to the ground in a diffusive way." The sensor of the detection instrument is used to detect above the road surface of the pipe to find the leak.


Hunan Puqi Geological Exploration Equipment Research Institute is a professional institution engaged in the research of pipeline leak detection equipment and urban pipeline loss reduction. Mainly committed to the underground pressure pipeline leak detector application technology research and scientific and technological research has been jointly established with Harbin Institute of Technology, the 13th Five-Year National Water Special R & D base, with Hunan University of Science and Technology, the establishment of a strategic innovation base for industry-university research, and the University of Algeria reached a strategic partnership in a new generation of underground pressure pipeline leak detection equipment research and development of independent core leak detection technology has caused We have applied for a number of invention, utility model and appearance patents for our pipeline leak detection series instruments, forming our own unique technical features and advantages.

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Water leak detection method for fire protection pipes


Water pipe leak detector, generally called water leak detector, or pipe leak detector, underground pipe leak tester, etc.


Water leak detection method for fire protection pipes

Its working principle is the pressure water pipe leak after the pressure water from the pipe breakout rushing out, and the pipe wall friction generated by the sound vibration and other additional vibration caused by the transmission to the pipe above the ground, the instrument is used to detect the road surface to find out the leak.


In general, the basic detection method is, connect the host, headphones, sensors. Turn on the switch, put on the headphones, place the sensor on the road above the pipeline, place it step by step according to the length of the pace, and listen to it step by step, the closer to the leak, the stronger the signal, the farther away from the leak the weaker the signal, and achieve the purpose of detecting the leak by comparing the signal strength between different points. Therefore, we use the instrument, a single point to listen to the leak signal is not meaningful, to multi-point repeatedly to compare, 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, may be larger points instead in the side of the road above the pipe, rather than being the pipe Above the road, 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.