Pipe coating
US4523141A · kind A · utility
19Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1982 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Apr 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pipe coating having a thermal insulating layer of polymeric material and an outer barrier layer is provided with an additional electro-conductive layer intermediate between the two layers to facilitate testing of the latter for discontinuities by conventional electric testing equipment for detecting discontinuities in the outer barrier layer, e.g. by measuring electrical conductivity or resistivity along the face of the barrier layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.