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Title: Quantitative studies in guided wave inspection of pipelines
Author: Sanderson, Ruth M.
ISNI:       0000 0004 2748 7373
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2012
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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.
Supervisor: Not available Sponsor: Royal Commission for the Exhibition of 1851 ; ERA Foundation ; TWI Ltd
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TA Engineering (General). Civil engineering (General)