Work has been done by Huber Testing Oy to develop eddy current testing equipment for the boiler floor tubes. Equipment include an eddy current device, computer and a carriage for the probes. The probes developed are designed to detect cracks initiating from the side fillet welds to the tubes and cracks initiating on top of the tube. The resolution is highest near the welds and on top of the tube. Results show improved crack detectability compared to penetrant testing. Local corrosion in compound tubes can also be detected and distinguished. Research in testing carbon steel tubes for surface cracking has also been done. Results of the eddy current test are recorded with the help of a probe locator and software developed for the test.
Computerized ultrasonic testing has been used for thickness measurement of carbon steel tubes. Thickness measurement is done to the whole length of the tubes and minimum thicknesses are recorded within a chosen interval. The equipment makes a fast thickness measurement of the whole floor area possible.
Key words: Soda recovery boiler, Non-destructive testing, Eddy current, Ultrasonic
Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00
Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:
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