NDTnet 1998 Aug, Vol.3 No.8

Abstract

During the past few years radioscopy established itself in many fields that demand instant evaluation and a high degree of automation, as in the case in serial inspection. A major advantage of radioscopy is the fixible inspection perspective that allows an optimum adjustment of beam direction and geometrical magnification. It also permits in-motion testing. User experience has clearly shown that inspection costs can be considerably reduced by this technique and an equivalent or often even better flaw detectability is ensured, in comparison with radiography.

It is particularly in the serial inspection of castings, that radioscopy constitutes state of-the-art when used in conjunction with image intensifier, digital image processing and an automatic image evaluation. For the examination of welds, however, standardization is still non-existent, thus rendering more difficult the application of this inspection technique. Approval procedures by the respective supervisory boards are often complicated and geared to each individual case. Therefore, since a standard is so far non-existent, the full utilization of the advantages in radioscopy is not possible.

For some years now, standards are being drafted for radioscopic applications. Now, the three-part draft of a radioscopy standard is close to being finished. The first part of the standard deals with the fundamental demands that are placed on the measuring devices to be used and on the procedures to be implemented toward a definition of the relevant parameters of the imaging system. The performance of a radioscopic system should always be checked via test pieces with natural flaws. To ensure comparability, standardized IQI's have to be used wich are described in part two of the standard. Part three of the radioscopy standard is to define the minimum requirements that are placed on radioscopic systems to cover diverse applications.

This paper will discuss the present state of the preparations that the adhoc working group "Radioscopy" of IIW, CEN and ISO is involved in.

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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