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EMAT thickness measurement for tubes in coal-fired boilers

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  • Bergander, Mark J.

Abstract

Boilers, the most troublesome components of electric-power generation plants, cost the US utility industry over $5 billion per year in unscheduled shutdowns, repairs and power replacements. The non-destructive testing technique is an important tool for predicting the life of boiler tubes. A standard ultrasonic technique is used for measuring their wall thicknesses and determining the degree of corrosion. Such a test requires clean, rust-free surface and all tubes must be sandblasted prior to the inspection. This adds precious hours to the boiler's outage-time. This paper presents the application of the electromagnetic-acoustic transducer (EMAT) process that accurately measures the tube's wall thickness through thick layers of crusty scale--the kind most often found in aging fossil-fired boilers. Laboratory and field trials were carried out during the last outage season. Back-to-back tests showed that good agreement between the results of the EMAT technique and the classic ultrasonic thickness gauge measurement process.

Suggested Citation

  • Bergander, Mark J., 2003. "EMAT thickness measurement for tubes in coal-fired boilers," Applied Energy, Elsevier, vol. 74(3-4), pages 439-444, March.
    • Handle: RePEc:eee:appene:v:74:y:2003:i:3-4:p:439-444
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    Cited by:

    1. Tomasz Hardy & Amit Arora & Halina Pawlak-Kruczek & Wojciech Rafajłowicz & Jerzy Wietrzych & Łukasz Niedźwiecki & Vishwajeet & Krzysztof Mościcki, 2021. "Non-Destructive Diagnostic Methods for Fire-Side Corrosion Risk Assessment of Industrial Scale Boilers, Burning Low Quality Solid Biofuels—A Mini Review," Energies, MDPI, vol. 14(21), pages 1-15, November.

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