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FIELD DEMONSTRATION OF EMERGING PIPE WALL INTEGRITY ASSESSMENT TECHNOLOGIES FOR LARGE CAST IRON WATER MAINS
Citation:
Nestleroth, B., S. Flamberg, A. Chen, L. Wang, M. D. ROYER, AND A. Williams. FIELD DEMONSTRATION OF EMERGING PIPE WALL INTEGRITY ASSESSMENT TECHNOLOGIES FOR LARGE CAST IRON WATER MAINS. Presented at 2010 ASCE Pipelines Conference, Denver, CO, October 15 - 16, 2010.
Impact/Purpose:
To inform the public.
Description:
The U.S. Environmental Protection Agency sponsored a large-scale field demonstration of innovative leak detection/location and condition assessment technologies on a 76-year old, 2,500-ft long, cement-lined, 24-in. cast iron water main in Louisville, KY from July through September 2009. Six inspection companies demonstrated 12 technologies that were at various stages of development and provided different types and levels of structural condition data. This paper presents the results of six pipe wall integrity assessment technologies, including both inline inspection of the entire length of pipeline (i.e., Sahara Video®, PipeDiver® remote field eddy current testing, and SeeSnake® remote field testing) and external inspection at selected excavation points (i.e., magnetic flux leakage-external condition assessment tool, broadband electromagnetic [BEM]-hand scanning kit, and BEM-keyhole inspection system). These inspection technologies can acquire pipe condition data, such as wall thickness, metal loss, and/or cracks. For each technology, inspection results will be compared to the dimensions and locations of induced defects already known and naturally-occurring wall defects found after excavation.