Community Research and Development Information Service - CORDIS


Line pipes used for the transport of combustible fluids are manufactured according to the highest safety standards. The decisive test method to assess the quality of the welded seams is X-ray testing. In this pilot project, the generally used X-ray films were replaced by an electronic X-ray image sensor connected to an image processing computer. The digital images acquired in this way are subsequently available for digital image enhancement techniques, automatic evaluation and digital storage.

In the course of the project, a pilot system designed for testing one pipe end was set up at the Mulheim works of Europipe in order to examine, under mill conditions, if such systems can replace X-ray films in the production of submerged arc-welded line pipe. Extensive tests were performed to optimise the radioscopic conditions and to determine the limits of the equipment. In parallel, work for the automatic evaluation of the images obtained with the set-up was performed.

The good quality of the images obtained with the set-up installed in the mill was confirmed by an assessment of the system by RWTUV. The development of the basic algorithms for the automatic evaluation software was finished and the implementation of these programs on the computer system used in the mill is in progress.

Meanwhile, the pilot set-up has been replaced by a production set-up capable of testing the full length of the pipe. The large amount of X-ray images recorded daily with this set-up is stored on CD-ROMs in the industry-standard ISO 9660 format. rmat.

Additional information

Authors: SCHONARTZ N, Mannesmannrohren Forschungsinstitut, Duisberg (DE);COEN G, Betriebsforschungsinstitut VdEh, Dusseldorf (DE);ODET C, Insalvalor SA, Villeurbanne (FR);BORRAS G, Insalvalor SA, Villeurbanne (FR)
Bibliographic Reference: EUR 20074 EN (2002), pp.150. Euro: 22.00
Availability: EUR-OP Reference:KI-NA-20074-EN-S. Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-2145-2
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