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Technical Discussions
Kris Van de Rostyne
Kris Van de Rostyne
04:35 May-09-2003
inspection of SCC in steel tubes

Hello,
One of our customers is having problems of stress corrosion cracking in large heat exchanger tubes (diam 300mm, length 3m, stainless steel). The inside of the tube is empty and accessible from one side, while the outside is in contact with oil of around 90°C.
Does anybody know companies (preferably in or close to Belgium) having systems capable of inspecting (UT/ET) this kind of pipe, using e.g. robotic crawlers?
Suggestions are welcome at my e-mail address (kris.vanderostyne@METALogic.be).
Thank you very much in advance,

Kris



    
 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
05:55 May-11-2003
Re: inspection of SCC in steel tubes
You could try Physical Acoustics BV - they are in Rotterdam and have a UT system called Tubescan which has Large Diamter plus Shear and Compressional Wave UT capability.


    
 
 
(Mr.) Dana H. Ives
Engineering
CoreStar International Corp., USA, Joined Jan 2003, 10

(Mr.) Dana H. Ives

Engineering
CoreStar International Corp.,
USA,
Joined Jan 2003
10
00:07 May-12-2003
Re: inspection of SCC in steel tubes
We have had good success in detection of SCC regardless the orientation of the damage
using an eddy current probe that is contoured to the surface. In the past, the scans
were done by hand due to the complexity and the diameter variations (25mm to 70cm) of the
piping. However, altering the design to contour the probe to the ID curvature of your
piping should require minimal effort. Fixturing of the probe(s) would require greater
effort but it can be done.

You can see an example of our OD probe at www.corestar-corp.com, click on
Eddy current and RFT Probes, then the CSP link at the bottom of the page.


    
 
 

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