NDTnet 1998 Aug, Vol.3 No.8

Abstract

Apart from the rules given in the relevant standards it is decisive for a reproducible flaw detection by radiographic inspection to apply the right film system class. The classification of film systems including the film as well as chemicals and processing is regulated by the EN 584-1. Usually the products of a manufacturer are classified according to this standard, but often no classification exists for the mixed systems, the combinations of products of different manufacturers. The film system is very sensitive and even small changes in one of the components which improve the system of the manufacturer can change the class of a mixed system in both directions. It arises therefore the problem that due to the application of mixed systems a first classification will not be valid for a long period. This is true all the more under the conditions of the progressive integration in the European Union and the greater Europe, where new companies enter the market with new film types and systems. The safety and quality of industrial products is highly correlated with the sensitivity of detection in NDT and this is also influenced by the applied film system class, therefore a continuous surveillance of the systems on the market by a neutral institution seems to be necessary. A system for quality assurance for industrial x-ray film systems is proposed which has to be developed in a common project of film manufacturers, NDT-companies and BAM. In this system the classification, certification and surveillance of film systems by BAM can be initiated by manufacturers and users. For this purpose films and chemicals are to be bought from the market, measurements of at least six samples of a system must be performed and each system should be measured once a year and the results shall be published. The surveillance system starts in the first year and will then be stopped or prolonged depending on the results.

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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