PMP repairs 30-inch water main inside 4 hours
30 June 2006, News release from PMP Ltd
A rapid response to a serious leak in a main by Planned Maintenance (Pennine) Ltd prevented thousands of premises from being without water.
A major leak was discovered in a 30 inch-diameter mains pipe at Hurst Green, near Clitheroe; the cause was a failure of a joint between a section of concrete main and cast iron main. Once Balfour Beatty, working with United Utilities, had shut down the water supply, they had only 60 hours to make any repairs. PMP were called as their proven Amex-10-Seal system was the ideal solution to the problem.
As a result of the main's age, problems were encountered with the valve when attempting to shut off the supply. It was feared that a different valve, further upstream might need to be used, which would have affected many business premises (including restaurants) in Hurst Green. However, this was averted as the original valve was able to be closed. Once the water supply was off, PMP engineers worked late into the night to complete the repair to the joint in as short a time as possible. As a precaution a second seal was fitted to an upstream joint. Access to the next downstream joint was not possible.
The Amex-10-Seal is a low profile mechanical seal for internal repair of leaking pipe joints. A robust section of rubber that spans the joint is fitted using hydraulic expansion of stainless steel compression rings, thus eliminating the use of chemical adhesives and their associated hazards. The seal is able to accommodate substantial joint movement and provides abrasion resistance. Each seal has an independently verified life expectancy of more than 50 years.
Being an internal seal, the Amex-10-Seal system was the least invasive method of repair available. Amex-10-Seals can be fitted to all pipe sizes, where man access is achievable. By completing all repairs internally, trenching and service costs are avoided.
Balfour Beatty Area Manager Mike Rogers and Project Manager Noel Prestage, were in charge of the operation. Noel Prestage commented: 'Once the water was shut down, PMP repaired the joint within 4 hours of accessing it - that was the beauty of the operation.' He added that previous experience of working with PMP and the Amex seal system was the reason for them being called in for this emergency repair.
Planned Maintenance (Pennine) Limited, formed in 1983, are specialists in joint repair and testing for man accessible pipelines. PMP also undertake penstock and valve repair, refurbishment or replacement, and reservoir surveys. For more information please visit www.pmp-ltd.co.uk.
For further information please email PMP Ltd