We use our own and third-party cookies to improve our services, provide quicker access to these services and personalise them by analysing your browsing habits. By continuing to browse this site you are agreeing to their use. Further information is available in our cookies policy.x
Client: United Utilities
Location: Chorley, Lancashire, UK
Pipe material: Asbestos cement, Medium density
polyethylene, Lined Ductile iron
Pipe diameter: 225-300mm
Pipe length: 5,200m
"We are really impressed with the standard of work, level of professionalism and all round well done for the job." John Cott, United Utilities's Project Manager
United Utilities Group PLC (UU), manages the regulated water and waste water network in North West England which includes Cumbria, Cheshire, Greater Manchester, Lancashire and Merseyside which have a combined population of nearly 7 million.
United Utilities perform regular pipe cleaning works. Due to a build-up of manganese and iron in four lengths of water main in the Chorley area totalling 5.2km, it was proposed to use Ice Pigging for the cleaning. Other cleaning methods that were previously used were swabbing and air scouting were likely to prove very difficult if at all possible because of the inaccessibility of the identified areas. One particular length was even deemed "uncleanable" by United Utilities.
Ice Pigging was selected due to its ability to easily flow through changing pipe diameters, bends and fittings without requiring any excavations. Once inserted into the pipe the ice catches and carries all the sediment along to the outlet point.
Water prior to the pig followed by ice with retained material from the pipe wall followed by clear material after pigging.