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Quantitative studes in guided wave inspection of pipelines
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Sanderson, Ruth M. (2012) Quantitative studes in guided wave inspection of pipelines. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b2680795~S1
Abstract
Long-range guided wave inspection is a relatively new and exciting non-destructive
testing technique for the detection of corrosion in pipes and pipelines. The technique
has the potential to increase the extent and cost effectiveness of industrial
examinations for degradation which may be unpredictable and widespread, such as
corrosion. The current commercial equipment has the ability to screen 100% of the
volume of tens of metres of straight pipe from a single test location. However, the
technique is yet to be taken up on a large scale relative to competing technologies
such as intelligent pigs. Operators generally need quantitative information, yet it is
principally a screening tool. It is also suited to straight pipe and inspection beyond
common features such as pipe bends can be problematic. There is therefore a need
to advance guided wave technology to the point where quantitative information can
be obtained from lengths of straight pipe and beyond pipe bends.
The work presented here starts with the development of an analytical model
for straight pipe which can be used to design arrays and predict the propagation
of guided waves. Then, existing techniques for the sizing of
flaws have been built
upon and practical inspection procedures developed. These procedures have been
validated for a range of pipe sizes and
aw types. Next, formulae for the prediction
of refl
ection and transmission coefficients from single
flaws have been derived and
used in the development of an analytical model for pipes containing multiple
flaws.
Finally, the effect of the presence of geometrical features such as a pipe bend has been
studied. Inspection procedures have been developed that allow the signal distortion
caused by a pipe bend to be corrected. This means that
flaw sizing methods have
the potential to be used beyond bends and in complex pipe networks.
Item Type: | Thesis (PhD) | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
Library of Congress Subject Headings (LCSH): | Pipelines -- Research, Nondestructive testing, Quantitative research | ||||
Official Date: | October 2012 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | School of Engineering | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Hutchins, David A.; Billson, Duncan; Mudge, P. J. (Peter J.); Catton, Phil | ||||
Sponsors: | Great Britain. Royal Commission for the Exhibition of 1851; ERA Foundation; TWI Ltd. | ||||
Extent: | xviii, 141 leaves : illustrations. | ||||
Language: | eng |
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