Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1988-07-21
1989-08-01
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324525, 324551, 340604, G01R 2714
Patent
active
048536164
ABSTRACT:
A method for detecting water saturation of thermal insulation located between a flowline and metal sheathing at a location where the flowline is positioned in a metal casing. Electrical resistance measurements are made between the metal sheathing and flowline, between the casing and the sheathing, and between the casing and the flowline. The resistance values and/or direct voltage and current measurements are used to determine actual resistance through the insulation as an indication of water saturation.
REFERENCES:
patent: 3803485 (1974-04-01), Crites et al.
patent: 4029889 (1977-06-01), Mizuochi
patent: 4506540 (1985-03-01), Marsh
Atlantic Richfield Company
Eisenzopf Reinhard J.
Metrailer Albert C.
Miele Anthony L.
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