Northumbrian expands ‘self-healing’ leakage tests
Sep 14, 2022
A gel and mineral-based solution allowing leaking water pipes to ‘self-heal’ without the need for excavation is being tested by Northumbrian Water field teams across the north east after a successful trial in Newcastle.
Made from water, gel and minerals, it is designed to quickly stop or stem leakages without necessarily knowing their exact size or location.
Adapted from technologies already implemented in the oil and gas sector with the help of chemical solutions provider Aubin, No Dig sees a non-toxic sealing medium injected at the approximate location of a leak between two memory shaped pigs deployed to isolate a section of pipe. Pressure is then applied to both pigs, squeezing the sealant into the leak.
“It is still early days at the moment, but we are seeing some really positive progress in this project and we really do think it could completely change the way we, and in time all water companies, operate in the future,” Jim Howey, head of water networks at Northumbrian Water said. “There is a lot of potential here.
“As well as wasting water, leaks can also cause lots of disruption for customers if we need to carry out excavations – but this will eliminate that tricky step from our process.”
No Dig trials have already been carried out on live water mains across the north east over the past year, with the solution rolled out in Newcastle, Seaton Delaval and Bowburn, for example.
News of Northumbrian’s broader trials comes after parts of England experienced the driest since records began following five months of below-average rainfall, and with widespread drought placing extra pressure on water efficiency.
Water companies have already committed to cutting leakage rates in half by 2050 with firms employing solutions as diverse as satellites and sniffer dogs to both track and tackle leaks.
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