Detection of water saturation in insulation at cased road crossi

Details Detection of water saturation in insulation at cased road crossi Detection of water saturation in insulation at cased road crossi

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

048536156

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), Crite et al.
patent: 4029889 (1977-06-01), Mizuochi
patent: 4506540 (1985-03-01), Marsh

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