The different units of the system are described in relation to the industrial condition monitoring of large steel pipes. Particular emphasis is attributed to the detector unit design, operation and its characterization. The initial results on detector characterization are presented and discussed relative to the developed procedures for quantitative radioscopical image interpretation. In particular, the determination of the detector quantum efficiency is critical for the accuracy of procedures for determination of remaining pipe wall thickness based on differences in attenuation. The results obtained on inspection and quantitative characterization of a number of large test steel pipes are presented and the accuracy obtained is discussed. The approach considered for near real time tomographic radioscopy is described. On the basis of the complexity of the entire system, the practical applicability of the expert software is outlined. For example, background knowledge of the expert software allow an assessment of the image quality under given circumstances, helping the operator to perform cost-effective exposures.
It is concluded, that the developed system provides for a new, efficient and reliable quantitative condition monitoring of large steel pipes and other large constructions on- and off-shore. Spin-off effects of the performed research indicates that the underlying design principles may provide also for improved radioscopic imaging of welds and polymeric composites, at much lower radiation energy levels.
Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00
Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:
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