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GE Inspection Technologies GmbH
offers equipment, systems and expertise based on ultrasonics, radiography, eddy curreent and remote visual inspection.

645 views
06:01 May-07-2009
Jaga
High Temp UT on Vessel

Dear all,
i need some help on inspection and calibration procedure for high temp pressure vessel.
the temperature range from 50 degree C to 250 degree C.
Thank you.

 
13:53 May-07-2009

Roger Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
Re: High Temp UT on Vessel In Reply to Jaga at 06:01 May-07-2009 (Opening).

First, pick a couplant that can be used over the entire temperature range. My favorite is heavy silicone grease -- Dow Corning's High Vacuum Grease.

Second, bring your cal block up to temperature -- ASME limits are plus/minus 25 degrees F [14 degrees C] of the part in question. Then calibrate. I typically tuck my setp-block into the insulation on the part and calibrate there at the hot part.

 
15:11 May-07-2009

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
Re: High Temp UT on Vessel In Reply to Jaga at 06:01 May-07-2009 (Opening).

This application note on high temperature ultrasonic testing may be helpful:

http://www.olympus-ims.com/en/ndt-application/183-id.209715235.html

 


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