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. Includes 6 references, figures.
| Edition : | Vol. 92 - No. 7 |
| File Size : | 1
file
, 400 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Published : | 07/01/2000 |
