Articles & Case Studies


Posted: Thursday 4th October 2012

PMP received an emergency request for assistance from United Utilities. Following a major burst on a 40” diameter pipeline, potentially impacting on supplies for 170,000 customers, PMP received an emergency request for assistance from United Utilities.

A significant number of properties in Huyton, near Liverpool, the location of the burst, experienced flooding.

PMP surveyed 4.5km of pipeline in approximately 500m sections. A survey report for each section of pipeline was produced for United Utilities within 2 days. A civil’s contractor exposed the pipe at 11 locations, both East and West of the burst. This allowed PMP access to undertake the surveys and install the AMEX-10 seals. Using a seven man team the surveys and installations were carried out safely under Confined Space Regulations. Director, Stephen Taylor commented “Entries into difficult confined spaces that require a swift survey and solution is what we do best. It also highlights the benefits of a close working relationship as a Framework Contractor with United Utilities and its partners”

139 AMEX-10 seals were installed along the 4.5km pipeline. This was successfully achieved without any adverse effects and, as the repairs were also delivered within the required project timescale, United Utilities were able to return the pipeline to service without any interruption to supply.

The AMEX-10 seal is a low profile mechanical seal specially designed 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. Each seal has WRAS approval and an independently verified life expectancy of more than 50 years. PMP work on a ‘no seal no pay’ scheme.

A letter of thanks following the success of the job:I would like to thank you and your team for the excellent work you did on the repair of the 40" Trunk Main in Huyton. Your teams worked with great professionalism and with a desire to see the job to completion. Most importantly they demonstrated a great attitude to the health and safety of themselves, our other teams working on the job and to members of the public. They worked in difficult conditions, in restricted space, under a busy main road without any incidents or accidents. A great achievement! I am confident that the work carried out to repair the 40" will ensure a robust water supply to the local residents. Thanks again for your contribution to this successful project.

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