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Quantification and location of leaks within distribution gas mains has posed a considerable problem for many years. Leak location is currently achieved by means of gas detectors from above ground, but this method proves to be inefficient when pinpointing leaks and is also incapable of detecting...
The remote field eddy current (RFEC) technique is a through-wall non-destructive method of evaluating pipelines for defects which can be used in metallic pipes, both magnetic and non-magnetic. Although pipe replacement policies in the UK have been successful, corroded pipe can be missed and...
The treatment of leaking joints in gas mains by spraying anaerobic sealant inside the pipe has been shown to be successful in the majority of cases. However, a significant proportion of the repair cost relates to the excavation and reinstatement of the access trench, and the use of keyhole...
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