Flaw detector for pipe employing magnets located outside the pipe and detector mounted inside and movable along the pipe with the magnets
US4217548A · kind A · utility
10Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Dec 12, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/82
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector for magnetically detecting flaws on the inner surface of a pipe of magnetizable material comprises a magnetizing assembly having exciting magnets and movable longitudinally along the interior of the pipe and a detecting assembly movable longitudinally along the exterior 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.