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- since 1996 -

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Technical Discussions
Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 618

Rolf Diederichs

Director,
NDT.net,
Germany,
Joined Nov 1998
618
00:01 Jun-10-1998
Summary of the first days' discussions

Thanks for all the good ideas and thoughtful opinions of the last few days.
Also I noticed that the Internet was a great help for the TV and Press to get information.

I'd like to summarize basic points that have been brought up so far.

See also Mr. Wuestenberg's two messages.
1. Posted on June 07, 1998 at 21:43:48:
2. 'Problems With Crack Detection In High-Speed ICE Wheels'
Posted by: Rolf Diederichs , E-mail: rd@ndt.net, on June 08, 1998 at 23:38:06:

In 1992 a first ultrasonic surface wave system was delivered and applied at the inspection shop in Hamburg's train station and again in 1994 in the Munich train station. As late as 1997 several publications referred to those systems as being 'in operation'. What means 'in operation'? I think that statement confused many people.

We tried to get more information about the usage of this system. Mr. Schwarz, general manager of Hegenscheidt explained yesterday that 'the system was from the very early stages not seriously used and never attained the status of an official test procedure'. Thus, our interpretation of 'in operation' is 'in trial operation'.

During this trial operation improvements on the concept had been made and a new design was on the way. According to Mr. Schwarz the system will go on trial in the coming weeks. We assume it is the concept outlined in the lecture at DGZfP 1996 in Lindau.
'Tiefenbestimmung von Laufflächenfehlen an Eisenbahnrädern unter Nutzung linear polarisierter Transversalwellen'.
H.-J. Salzburger, FhG IZFP, Saarbrücken; H. Hintze, Deutsche Bahn AG, Kirchmöser.
http://www.ndt.net/article/0698/salzb/salzb.htm (new online but still in German only).

There is no doubt that such a system will be better. However, we hear from experts (also here in the NDTnet forum) that this new concept
might not be good enough.

Now is the time for critical assessment and continuing discussion, here in this forum as elsewhere. It will be interesting to see what changes will come about as a result of recent events.

Rolf Diederichs


 
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