Characteristics of the Reflection of Lamb Waves from Defects in Plates and Pipes
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
The detection of corrosion defects in pipework is an extremely important topic, particularly in the oil and chemical industries. The established procedures rely on the removal of any insulation material followed by localised inspection which is extremely expensive. A cheap and rapid inspection method would therefore be of great value. Researchers at Imperial College have developed a rapid testing scheme, utilising Lamb waves which propagate along the pipe. It is essentially a pulse-echo scheme: the instrumentation is located at a single position on the pipe; it excites waves in the pipe and then receives reflections which return from any corrosion defects. Details of the development of the technique and field trials have been reported elsewhere [1–5].