Underground Construction Technology International Conference & Exhibition

There is a glaring need for condition assessment tools that will allow utilities to implement selective repair and replacement strategies based on the actual condition of the pipelines. To keep the overall project cost and effort manageable, and to maintain customer service levels, these technologies need to be able to address pipelines while they are in service. This session outlines two approaches now available for condition assessment of metallic mains while they remain in service. The first is a tethered inline inspection system which can detect discontinuities in the pipe wall, internal corrosion, damage to or loss of the liner, and is under testing for its ability to provide average wall thickness over set intervals. The second is a "smart pig"