Method and apparatus for scanning a plurality of parallel pipes for flaws using tube-to-tube through transmissions
US5821747A · kind A · utility
9Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Jan 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/902
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining position size and shape of defects in a bundle of heat exchanger tubes are described. An AC current exciter coil is placed in one tube and a detector coil is placed in an adjacent tube. This configuration of exciter and detector coils reduces the blind spot effect caused by interference by tube support plates and allows the inspection multiple or finned heat exchanger tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.