Title
1-D profiling using highly dispersive guided waves
Author
Volker, A.W.F.
van Zon, A.T.
Publication year
2014
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 of steel pipes. 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 pitch-catch configuration at the 12 o'clock position using highly dispersive guided waves. After dispersion correction the data collapses to a short pulse, any residual dispersion indicates wall loss. The phase spectrum is used to invert for the wall thickness profile in the circumferential direction, assuming a Gaussian defect profile. The approach is evaluated on numerically simulated and on measured data. The method is intended for rapid, semi-quantitative screening of pipes.
Subject
Fluid Mechanics Chemistry & Energetics
PID - Process & Instrument Development
TS - Technical Sciences
Physics
Industrial Innovation
Inversion
Wall Thickness Profiling
Corrosion
Defects
Nondestructive examination
Circumferential direction
Dispersion correction
Guided wave tomographies
Integrity levels
Reliability and safeties
Residual dispersions
Guided electromagnetic wave propagation
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http://resolver.tudelft.nl/uuid:585bca80-0c78-49da-ba88-7caa351d1f9d
TNO identifier
513314
Publisher
American Institute of Physics
ISBN
9780735412118
ISSN
1551-7616
Source
40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013, 21-26 July 2013, Baltimore, MD, USA, 1581 33, 186-192
Document type
conference paper