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DOE OSTI · 22391264

1D profiling using highly dispersive guided waves

Volker, Arno·Zon, Tim van·Enthoven, Daniel·Verburg, Wesley
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Abstract

Corrosion is one of the industries major issues regarding the integrity of assets. Currently inspections are conducted at regular intervals to ensure a sufficient integrity level of these assets. Cost reduction while maintaining a high level of reliability and safety of installations is a major challenge. There are many situations where the actual defect location is not accessible, e.g., a pipe support or a partially buried pipe. Guided wave tomography has been developed to reconstruct the wall thickness. In case of bottom of the line corrosion, i.e., a single corrosion pit, a simpler approach may be followed. Data is collected in a pit-catch configuration at the 12 o'clock position using highly dispersive guided waves. The phase spectrum is used to invert for a wall thickness profile in the circumferential direction, assuming a Gaussian defect profile. An EMAT sensor design has been made to measure at the 12 o'clock position of a pipe. The concept is evaluated on measured data, showing good sizing capabilities on a variety simple defect profiles.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSCONFIGURATIONCORROSIONDEFECTSDESIGNELECTROMAGNETIC RADIATIONGAUSS FUNCTIONINSPECTIONRELIABILITYSENSORSSOUND WAVESTHICKNESSTOMOGRAPHYTRANSDUCERSWAVE PROPAGATION

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Volker, Arno, Zon, Tim van, Enthoven, Daniel, Verburg, Wesley. 2015-03-31. 1D profiling using highly dispersive guided waves. https://doi.org/10.1063/1.4914677

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