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Proceedings Paper

Corrosion/erosion detection of boiler tubes utilizing pulsed infrared imaging
Author(s): Maurice J. Bales; Chip C. Bishop
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Paper Abstract

This paper discusses a new technique for locating and detecting wall thickness reduction in boiler tubes caused by erosion/corrosion. Traditional means for this type of defect detection utilizes ultrasonics (UT) to perform a point by point measurement at given intervals of the tube length, which requires extensive and costly shutdown or `outage' time to complete the inspection, and has led to thin areas going undetected simply because they were located in between the sampling points. Pulsed infrared imaging (PII) can provide nearly 100% inspection of the tubes in a fraction of the time needed for UT. The IR system and heat source used in this study do not require any special access or fixed scaffolding, and can be remotely operated from a distance of up to 100 feet. This technique has been tried experimentally in a laboratory environment and verified in an actual field application. Since PII is a non-contact technique, considerable time and cost savings should be realized as well as the ability to predict failures rather than repairing them once they have occurred.

Paper Details

Date Published: 12 May 1995
PDF: 6 pages
Proc. SPIE 2454, Nondestructive Evaluation of Aging Utilities, (12 May 1995); doi: 10.1117/12.209379
Show Author Affiliations
Maurice J. Bales, Bales Scientific Inc. (United States)
Chip C. Bishop, Bales Scientific Inc. (United States)

Published in SPIE Proceedings Vol. 2454:
Nondestructive Evaluation of Aging Utilities
Walter G. Reuter, Editor(s)

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