06:33 Sep-03-1998 Yosi Bar-Cohen R & D, Jet Propulsion Lab (JPL), USA, Joined Nov 1998 26
Re: Corrosion Inspection by UT : Is there any standard/specification regarding UT of corrosion?. I mean, calibration, sensivity setting, and acceptance/rejection criteria.
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Dear Mr. Pauzi,
There are many standards and specifications for NDE of corrosion Most of the ones, with which I am familiar, are addressing specific structures and they are manufacturer proprietary documents. There are few generic documents that cover standard inspection procedures. As an example, ASTM has a limited information in its E1004 Standards on Eddy current.
07:31 Sep-03-1998 Rolf Diederichs Director, Editor, Publisher, Internet, PHP MySQL NDT.net, Germany, Joined Nov 1998 600
Re: Corrosion Inspection by UT : Is there any standard/specification regarding UT of corrosion?. I mean, calibration, sensivity setting, and acceptance/rejection criteria.
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Yosi Bar-Cohen mentioned already in his message that you can find standards addressing certain components. Here in Germany we have a guideline called US1 'Thickness Measurement with Ultrasound' published by the German Society for NDT, however so far only in German available, but I heard that an English version is on the way.
See: New German guidelines to wall thickness measurement - will be available in English http://www.ndt.net/news/wt_guid.htm
The handbook contains information on ultrasonic testing of corroded components. For instance, it is recommended to use an echo display for corrosion gaging since a blind test is often not reliable enough (digital numbers only). Also a proper probe characteristic is needed accordingly to the specific geometry of corrosion. Nowadays are guided waves (lamb waves) used for corrosion testing of specific structures and depicting the area as an c-scan image without the need to move the probe (e.g. aircraft structures, pipes). Examples are aircraft structures and pipes. But since it is a new method I think there exist no standard yet (Maybe Ahmad Chahbaz knows more about it).
You may also find information browsing/searching NDT.net issue 1997 No. 10 which focuses on "Ultrasonic Thickness Measurement" http://www.ndt.net/ut1097.htm.
Re: Corrosion Inspection by UT : : Is there any standard/specification regarding UT of corrosion?. I mean, calibration, sensivity setting, and acceptance/rejection criteria.
: ----
: Yosi Bar-Cohen mentioned already in his message that you can find standards : addressing certain components. : Here in Germany we have a guideline called US1 : 'Thickness Measurement with Ultrasound' published by the German Society for NDT, : however so far only in German available, : but I heard that an English version is on the way.
: See: : New German guidelines to wall thickness measurement - will be available in English : http://www.ndt.net/news/wt_guid.htm
: The handbook contains information on ultrasonic testing of corroded components. : For instance, it is recommended to use an echo display for corrosion gaging since : a blind test is often not reliable enough (digital numbers only). : Also a proper probe characteristic is needed accordingly to the specific geometry : of corrosion. Nowadays are guided waves (lamb waves) used for corrosion testing of : specific structures and depicting the area as an c-scan image without the need to : move the probe (e.g. aircraft structures, pipes). : Examples are aircraft structures and pipes. But since it is a new method I think : there exist no standard yet (Maybe Ahmad Chahbaz knows more about it).
: You may also find information browsing/searching NDT.net issue 1997 No. 10 which : focuses on "Ultrasonic Thickness Measurement" http://www.ndt.net/ut1097.htm.
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New German guidelines to wall thickness measurement .....
