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A platform for research: civil engineering, architecture and urbanism
Detecting breaks in prestressing pipe wire
A new electromagnetic technique for inspecting prestressed concrete pressure pipe enables nonintrusive inspection for even single broken prestressing wires.
Prestressed concrete pressure pipe (CPP) is in widespread use throughout Canada and the United States, with a total of some 19,000 mi (30,000 km) of pipe in use in North America's major water utilities. Many of these lines are more than 50 years old, and half are expected to need repair or replacement over the next 20 years. To selectively maintain these lines and avoid costs from catastrophic pipe failures, utilities needed an inspection technique that was highly sensitive, reliable, effective, and economical. An innovative electromagnetic technique, based on the remote field eddy current (RFEC) inspection technique, has been developed that allows nonintrusive inspection of prestressed CPP. Full‐scale testing conducted on embedded cylinder pipes and bar‐wrapped pipelines demonstrated the new RFEC technique's sensitivity to both single and multiple breaks in prestressing wire.
Detecting breaks in prestressing pipe wire
A new electromagnetic technique for inspecting prestressed concrete pressure pipe enables nonintrusive inspection for even single broken prestressing wires.
Prestressed concrete pressure pipe (CPP) is in widespread use throughout Canada and the United States, with a total of some 19,000 mi (30,000 km) of pipe in use in North America's major water utilities. Many of these lines are more than 50 years old, and half are expected to need repair or replacement over the next 20 years. To selectively maintain these lines and avoid costs from catastrophic pipe failures, utilities needed an inspection technique that was highly sensitive, reliable, effective, and economical. An innovative electromagnetic technique, based on the remote field eddy current (RFEC) inspection technique, has been developed that allows nonintrusive inspection of prestressed CPP. Full‐scale testing conducted on embedded cylinder pipes and bar‐wrapped pipelines demonstrated the new RFEC technique's sensitivity to both single and multiple breaks in prestressing wire.
Detecting breaks in prestressing pipe wire
Atherton, David L. (author) / Morton, Keith (author) / Mergelas, Brian J. (author)
Journal ‐ American Water Works Association ; 92 ; 50-56
2000-07-01
7 pages
Article (Journal)
Electronic Resource
English
Canada , Pressure , Pipelines , Utilities , United States , Concrete Pipe , Testing , Inspection
Improving Prestressing Wire Reliability in Prestressed Concrete Cylinder Pipe
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