US3872310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of corrosion by a radiometric technique
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-02-13
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Granted: 1975-03-18
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Expires: 1993-02-13
Abstract
Abstract Apparatus and method for detecting corrosion in boiler tubes. The tube wall thickness of each tube is measured in situ in the bundle using a radioisotopic method. The degree of corrosion thus indicated is plotted on a diagram in a way which highlights the corroded tubes.
Inventors
- 👤 John Stuart Charlton
- 👤 John Francis Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:26
CPC Classifications
G; G01; G01B; G01B15/00; G01B15/02; G01B15/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A method for the in situ monitoring or detection of corrosion in tubes which in use are subjected to a corrosive medium, by assessing the thickness of one or more tube walls in a bundle which consists of at least two parallel tubes, said method comprising emitting a radioactive emission from a plurality of tubes in a bundle in turn, detecting the emission in each of the immediately adjacent tUbes, thereby measuring the absorption of radiation in each such adjacent tube, and comparing the measurement with a standard measurement representing a known thickness of the material of which the tubes are made wherein the degree of corrosion of each tube is indicated on a diagram illustrating the configuration of the bundle by markings which correspond to the amount of absorption measured.
Claim 2
Independent Claim
131 words
A method for the in situ monitoring or detection of corrosion in tubes which in use are subjected to a corrosive medium, by assessing the thickness of one or more tube walls in a bundle which consists of at least two parallel tubes, said method comprising emitting a radioactive emission from a plurality of tubes in a bundle in turn, detecting the emission in each of the immediately adjacent tUbes, thereby measuring the absorption of radiation in each such adjacent tube, and comparing the measurement with a standard measurement representing a known thickness of the material of which the tubes are made wherein the degree of corrosion of each tube is indicated on a diagram illustrating the configuration of the bundle by markings which correspond to the amount of absorption measured.
References Cited (Backward Citations)
US2501174A
Cited
US2702864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |