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Teletest
Teletest Focus+ was the first system to use long-range guided wave ultrasonic testing to detect corrosion in pipelines.
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Technical Discussions
Faran Hussain
Engineering
FFC Pakistan, Pakistan, Joined May 2005, 17

Faran Hussain

Engineering
FFC Pakistan,
Pakistan,
Joined May 2005
17
14:01 May-10-2010
UT of jacketed lines

How can UT be performed economically for health assesment of jacketed lines without removal of the jacket.
We have witnessed a leakge in a jacketed line and on removal thickness loss was observed in the form of channelling.
Is there any method which uses surfaces waves to scan some appreciable length? something like LRUT but for short lenghts.

    
 
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Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 522

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
522
15:20 May-10-2010
Re: UT of jacketed lines
In Reply to Faran Hussain at 14:01 May-10-2010 (Opening).

If you want to do UT as such I think the only approach is to fit inspection point plugs at known critical or representative locations

The Pulse eddy current systems (INCOTEST etc) seem to be quite useful or detection of CUI

AS I understand it LRUT / surface wave techniques etc. can work OK at medium distances, but if the defect is channelling parallel to the flow I'm not really sure that it would show up well on LRUT as the change in cross-section would be very slow.

As noted recently on the forum the low dose CMOS xray equipment can be effective. We worked with this some years ago and I was quite impressed.

    
 
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Muthu
Director, - -
Metalcare Group Inc., Canada, Joined Oct 2008, 15

Muthu

Director, - -
Metalcare Group Inc.,
Canada,
Joined Oct 2008
15
14:16 May-16-2010
Re: UT of jacketed lines
In Reply to Joe Buckley at 15:20 May-10-2010 .

Lixi Profiler system could be of useful depending on the diameter for the piping.
http://www.ndt.net/article/wcndt00/papers/idn713/idn713.htm
It would be helpful if information available.
Muthu

    
 
 Reply 
 

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