Flaw detector for pipe employing magnets located outside the pipe and detector mounted inside and movable along the pipe with the magnets
US4258318A · kind A · utility
7Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1978 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Dec 13, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/9013
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector for magnetically detecting flaws on the inner surface of a pipe of magnetizable material comprising a magnetizing assembly having exciting magnets and movable longitudinally along the exterior of the pipe and a detecting assembly movable longitudinally along the interior of the pipe. The magnetizing and detecting assemblies are opposite and close to each other through the wall of the pipe and movable longitudinally of the pipe in a synchronized manner to ensure highly accurate flaw detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.