Other than using conventional leak detection equipment such as the mechanical listening stick in our operations, we always believe in using the latest available and proven technology in the industry. Different characteristics of pipe materials, soil condition, and site limitation requires its own unique approach of leak detection. We are experienced and are well trained in using all these equipment. Among the Active Leakage Detection tools employed by us are:
• SoundSens i by RD Palmer
• Hydrophone Sensors by Primayer
• LeakFinderRT & LeakFinderST (non metallic pipe) by Echologics
Sound Sens i
Enigma Hydrophone Sensors
When a liquid under pressure escapes from a pipeline it creates a sound pressure wave (leak noise) which travels along the pipe from the exit point. The velocity at which the sound travels within the pipe depends mainly on the pipe diameter and material. Most leak correlators will use two sensors which are attached to the pipe on either side of the leak point.
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To perform a correlation the user will input the distance between the two sensors, and the pipe material (if known) into the base unit.
Each sensor records the sound and transmits this data to a base unit, which measures the time difference between the leak noise signals arriving at each sensor. From this data, the base unit can calculate the precise location of the leak.
Hydrophone sensors are used to improve performance on traditionally difficult leak detection situations such as on plastic and larger diameter pipelines.
The sensor unit connects to 'wet' fittings that allow access through into the water column; for example, hydrants, washouts or meter points. The hydrophone sensor itself is an extremely sensitive marine sensor which listens in the water column. Typically leak noise travels at greater distances through the water inside the pipe, than through the pipe wall and fittings.
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Low frequency noise also travels best; hydrophone sensors are particularly sensitive to this low frequency noise.
The hydrophone is designed for deployment on site, a locking ring locks the adapter in place, and a bleed valve is operated to remove air from the sensor chamber to ensure the best quality sound. The unit is tightened in place with a standard valve key.
It began when Severn Trent Water (STW) in their drive to innovation in the science of leak detection commissioned fundamental research into leakage within plastic pipes. Collaborating with Loughborough University led to the development of a prototype leak noise correlator which demonstrated a marked improvement in performance. Results demonstrated that the new correlator out-performed all commercially available equipment.
Following extensive university research, STW approached Echologics to commercialize this product. Echologics, globally recognized for its innovative research into leakage in plastic pipes was the ideal partner. Further development led to a commercial prototype, complete with active trials using STW leak detection field crews since July 2013. These trials have proved so successful that Echologics has launched this as their next generation correlator. Branded LeakFinderST, it's now commercially available. With LeakFinderST, Echologics introduces a whole level of speed and accuracy in locating leaks. Until now leak noise correlators have had limitations in pinpointing leaks in mains. Speed and accuracy were just relative measures.
LeakFinderST enables municipalities to locate "quiet" narrow band, low frequency leaks and leaks previously identified as
background leakage on water mains, with a wide range of materials such as:
• Plastic (PVC, PE, MDPE, HMDPE)
• Pre-Stressed Concrete Cylinder Pipe (PCCP)
• Asbestos Cement (AC)
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• Ductile & Cast Iron (DI, CI)
Jalur Cahaya Sdn. Bhd.
No. 28, Jalan Pendaftar U1/54 Temasya Glenmarie, Seksyen U1 40150 Shah Alam, Selangor Darul Ehsan, Malaysia
Tel : +603-5565 1000
Fax : +603-5565 1165
Email : firstname.lastname@example.org
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