A pipe with protective cladding and insulation was simplified to a four-layered structure when the diameter of a pipe is large enough, and analytical solutions for sinusoidal and pulsed wave excitation were derived. Simulation implemented by using the analytical solutions showed that sinusoidal excitation is not appropriate for the monitoring of inner thinning, while pulsed eddy current method can be used to measure wall-thickness regardless of inner or outer thinning by using the decay rate of log(Bz) as a particular parameter to evaluate wall thickness. It was assumed that the diameter of a pipe was large enough and the piping system with protective logging and insulator was simplified to a four-layered structure. Analytical solutions for sinusoidal and pulsed wave excitation were derived. Simulation by using the fast analytical solutions showed that sinusoidal excitation is not appropriate for the monitoring of inner side wall thinning, while pulsed eddy current method can be applied to measure wall-thickness regardless of inner or outer thinning.


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    Title :

    Simulation for the assessment of wall thinning using eddy current method


    Additional title:

    Simulation zur Bewertung des Wandabtrags mittels Wirbelstromverfahren


    Contributors:
    Cheng, W. (author) / Komura, I. (author)


    Publication date :

    2011


    Size :

    8 Seiten, 9 Bilder, 1 Tabelle, 5 Quellen





    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English





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