Recently we had carried out an UT scan on one vessel as a part of the FFS activity. On the scanned contours we found some areas of null thickness. We got back to the party conducting the scan. It was reported that these readings were spurious due to non-contact of the probe or some roughness on the surface or paint spatters, bulges,dents etc.
Regards
S.Saha
FDC-Piping
SSO-D4
Tele: 11736
e-Director
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cc:
11/30/02 03:47 AM Subject: [PipingDesign] UT and
ECT method
Please respond to
PipingDesign
Recently we have carry out an inspection of boiler tubing with Eddy Current and Ultrasonic method...
However some of the tubing do not have any reading....
What can cause this no reading of the tubing?? is it due to wrong eddy current/ultrasonic frequency or there is to much deposit/foulings on the surface of the tube wall that resulted in no reading??
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Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Fri Nov 29 22:40:00 2002
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