Estimation of permeability for magnetic flux leakage modelling

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    Non-destructive testing techniques are gen-erally used for the evaluation of material properties and the detection of defects in pipelines. Especially, the measure-ment of magnetic flux leakage (MFL) is one of the most used methods for in-service monitoring of corrosion in buried oil and gas pipelines. However, for the geometrical reconstruction of defects in a pipeline from measured signals (the inverse problem), the magnetic properties of the mate-rial need to be known accurately. Due to the pipe geometry and wall thickness measurement of the bulk properties is complicated. In particular, the permeability of ferromagnetic steels shows a non-linear and hysteretic behaviour.
    Current research is focussed on the measurement and simulation of the permeability of pipeline material. The magnetic properties of a small ferromagnetic test sample is first investigated using a transformer set up in order to find a correct fitting equation for the non-linear permeability as a function of the magnetic flux density. This equation is then used for model simulations of a MFL test set up. Refitting the parameters of the permeability equation to the perme-ability of the pipeline material in the MFL set up proved that flux leakage signals could be predicted accurately for sev-eral defects by model simulation.
    Original languageEnglish
    Title of host publication10th International IMEKO TC7 Symposium
    Place of PublicationTomsk
    PublisherTomsk Polytechnic University
    Pages321-326
    ISBN (Print)5-93629-167-7
    Publication statusPublished - 30 Jun 2004
    Event10th IMEKO TC7 International Symposium on Advances of Measurement Science 2004 - Saint-Petersburg, Russian Federation
    Duration: 30 Jun 20042 Jul 2004
    Conference number: 10

    Conference

    Conference10th IMEKO TC7 International Symposium on Advances of Measurement Science 2004
    Abbreviated titleIMEKO TC7
    CountryRussian Federation
    CitySaint-Petersburg
    Period30/06/042/07/04

    Fingerprint

    Magnetic flux
    Pipelines
    Defects
    Magnetic properties
    Thickness measurement
    Gas pipelines
    Nondestructive examination
    Inverse problems
    Materials properties
    Pipe
    Corrosion
    Fluxes
    Geometry
    Steel
    Monitoring

    Cite this

    Heida, C., & Regtien, P. (2004). Estimation of permeability for magnetic flux leakage modelling. In 10th International IMEKO TC7 Symposium (pp. 321-326). Tomsk: Tomsk Polytechnic University.
    Heida, Ciska ; Regtien, Paul. / Estimation of permeability for magnetic flux leakage modelling. 10th International IMEKO TC7 Symposium. Tomsk : Tomsk Polytechnic University, 2004. pp. 321-326
    @inproceedings{da8386297fcf42538cd3fcd81ea55acf,
    title = "Estimation of permeability for magnetic flux leakage modelling",
    abstract = "Non-destructive testing techniques are gen-erally used for the evaluation of material properties and the detection of defects in pipelines. Especially, the measure-ment of magnetic flux leakage (MFL) is one of the most used methods for in-service monitoring of corrosion in buried oil and gas pipelines. However, for the geometrical reconstruction of defects in a pipeline from measured signals (the inverse problem), the magnetic properties of the mate-rial need to be known accurately. Due to the pipe geometry and wall thickness measurement of the bulk properties is complicated. In particular, the permeability of ferromagnetic steels shows a non-linear and hysteretic behaviour.Current research is focussed on the measurement and simulation of the permeability of pipeline material. The magnetic properties of a small ferromagnetic test sample is first investigated using a transformer set up in order to find a correct fitting equation for the non-linear permeability as a function of the magnetic flux density. This equation is then used for model simulations of a MFL test set up. Refitting the parameters of the permeability equation to the perme-ability of the pipeline material in the MFL set up proved that flux leakage signals could be predicted accurately for sev-eral defects by model simulation.",
    author = "Ciska Heida and Paul Regtien",
    year = "2004",
    month = "6",
    day = "30",
    language = "English",
    isbn = "5-93629-167-7",
    pages = "321--326",
    booktitle = "10th International IMEKO TC7 Symposium",
    publisher = "Tomsk Polytechnic University",
    address = "Russian Federation",

    }

    Heida, C & Regtien, P 2004, Estimation of permeability for magnetic flux leakage modelling. in 10th International IMEKO TC7 Symposium. Tomsk Polytechnic University, Tomsk, pp. 321-326, 10th IMEKO TC7 International Symposium on Advances of Measurement Science 2004, Saint-Petersburg, Russian Federation, 30/06/04.

    Estimation of permeability for magnetic flux leakage modelling. / Heida, Ciska; Regtien, Paul.

    10th International IMEKO TC7 Symposium. Tomsk : Tomsk Polytechnic University, 2004. p. 321-326.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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    T1 - Estimation of permeability for magnetic flux leakage modelling

    AU - Heida, Ciska

    AU - Regtien, Paul

    PY - 2004/6/30

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    N2 - Non-destructive testing techniques are gen-erally used for the evaluation of material properties and the detection of defects in pipelines. Especially, the measure-ment of magnetic flux leakage (MFL) is one of the most used methods for in-service monitoring of corrosion in buried oil and gas pipelines. However, for the geometrical reconstruction of defects in a pipeline from measured signals (the inverse problem), the magnetic properties of the mate-rial need to be known accurately. Due to the pipe geometry and wall thickness measurement of the bulk properties is complicated. In particular, the permeability of ferromagnetic steels shows a non-linear and hysteretic behaviour.Current research is focussed on the measurement and simulation of the permeability of pipeline material. The magnetic properties of a small ferromagnetic test sample is first investigated using a transformer set up in order to find a correct fitting equation for the non-linear permeability as a function of the magnetic flux density. This equation is then used for model simulations of a MFL test set up. Refitting the parameters of the permeability equation to the perme-ability of the pipeline material in the MFL set up proved that flux leakage signals could be predicted accurately for sev-eral defects by model simulation.

    AB - Non-destructive testing techniques are gen-erally used for the evaluation of material properties and the detection of defects in pipelines. Especially, the measure-ment of magnetic flux leakage (MFL) is one of the most used methods for in-service monitoring of corrosion in buried oil and gas pipelines. However, for the geometrical reconstruction of defects in a pipeline from measured signals (the inverse problem), the magnetic properties of the mate-rial need to be known accurately. Due to the pipe geometry and wall thickness measurement of the bulk properties is complicated. In particular, the permeability of ferromagnetic steels shows a non-linear and hysteretic behaviour.Current research is focussed on the measurement and simulation of the permeability of pipeline material. The magnetic properties of a small ferromagnetic test sample is first investigated using a transformer set up in order to find a correct fitting equation for the non-linear permeability as a function of the magnetic flux density. This equation is then used for model simulations of a MFL test set up. Refitting the parameters of the permeability equation to the perme-ability of the pipeline material in the MFL set up proved that flux leakage signals could be predicted accurately for sev-eral defects by model simulation.

    M3 - Conference contribution

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    BT - 10th International IMEKO TC7 Symposium

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    Heida C, Regtien P. Estimation of permeability for magnetic flux leakage modelling. In 10th International IMEKO TC7 Symposium. Tomsk: Tomsk Polytechnic University. 2004. p. 321-326