For a utility company, the installation of underground pipelines and fittings in the drinking water networks creates a huge investment. Pipe leakage is ruinous. People would not only waste valuable resources, it can also cause financial losses. To prevent this from reoccurring, damages in the pipeline must be addressed quickly and remedied.Generally, one of the most significant causes of damage is leakage in aging water pipelines. Much of the water infrastructure around the world is ageing and reaching the end of its useful life, this leads to a greater number of leaks and pipe ruptures. In order to detect this kind of damage; a company must be professional and expert in terms of Leak Detection.
For detecting leakage in water pipe networks, leak sounded like oppressed. Pressured waves are generated when liquid discharged at a point of damage, which are carried away in the water column.The pressure waves spread in the water column on both sides in a sinusoidal manner. Wherever the pressure waves meet the pipe material, it is caused to vibrate. These are structural vibrations. The further the pressure waves run, the weaker they become. Therefore there is a point where the waves in the water column no longer vibrate the raw material. At this point no sound will be heard. Also the type of soil, its compaction, the pipe material, the operating pressure, the pipe diameter and some other factors also play a role.
We offer several services to detect leakage in pipe networks. Zone measurements, pre-location and point location from a single source.
Zone measurements in water networks make it possible for losses to be quantified. This uses flow and frequency measurements to find out areas in pipes in which leakage has occurred.
Pre-location or encirclement of leaks can be done by listening straight to the accessible contact points such as hydrants or shut off valves (sliders). There is a coarse or pre-location according to the principle “louder = closer and” quieter = more distant “.
Pinpointing To conclude leakage pinpointing, Draindone offers three quite different technologies (ground microphones, tracer gas detectors and correlators).
Ground Microphones -When a pressurised water pipe leaks the water flows out which causes the pipe and surrounding material (mud, concrete tarmac) to vibrate. This sound, or vibration, is transmitted along the pipe, and through the surrounding material.
Listening sticks, metal or wooden poles with ear pieces, have been used for centuries for detecting water leaks, they are, at best, only able to detect water leaks that are very loud. However, contrary to common perception, it is not always the largest leaks which are the loudest; often a large split in a water pipe produces less noise than one pouring through a small hole. This can be particularly true in non-metallic pipes
Tracer gas detectors and correlators – Easily locate water leaks by pressurizing leaky pipes with a tracer gas, (helium or hydrogen) then search above the pipe with tracer gas water leak detectors. Hydrogen and helium are both lighter than air so they rise up from the leak. Since tracer gas detection does not involve listening, noises do not interfere with finding the leak. Hydrogen used for leak detection is normally mixed with 95% nitrogen and 5% hydrogen so that the hydrogen is always below the combustible limit.
Leak detection in water supply networks and domestic installations
- Electroacoustic listening
- correlation measurements
- Smallest leak detection with hydrogen
Searching for conduits of metallic and non-metallic pipes
- Cable systems and sewage pipes