The network operator United Utilities plc and Amey plc, located in the Northern part of the United Kingdom, were confronted with a leaking sewer rising main. The ductile iron pipe was installed in the 1970s and showed significant deterioration. Pinholes were present and the wall thickness was reduced to 1-2 mm, especially at the bottom of the pipe due to abrasion and chemical degradation. The section to be renovated had a total length of 800 meters and four 45 degree bends were present. The sewer rising main is operated with a maximum pressure of 2 bar. The client was looking for a renovation method with long installation lengths that could traverse bends, but also work with a reduced deployment of machinery since the close-by one-way street had to remain open for traffic.
Exhibitor: Rädlinger primus line GmbH