Forum Technical Discussions      Re: High temperature NDT ? Posted by: Jim Stuckless , E-mail: Address, on December 23, 2008 at 22:02 : In Reply to: High temperature NDT ? posted by : Ingvar , E-mail: Address, on December 23, 2008 at 16:07 : Ultrasonics can be utilized with specialized high temp couplant. MT can be used but the issue of specialized consumables arises. PT is the simplest but again the need for a specialized penetrant and developer comes into play. It really depends on what type of cracks you're searching for... are they surface or sub-surface? 500 Celsius really isnt that hot. I've done examinations on considerably hotter surfaces. I believe the hottest was close to 900 celsius... though it was very difficult to get a reproduceable result... at that temperature minor fluctuations make huge differences on most UT sets. The set I found best for extreme high temperatures was the krautkramer USN58 series (L, K and I believe there's an N model too... my favorite is the L.... still use it today). hope some of this helps. Jim Follow Ups: Post a Followup: Name: E-Mail: Subject: Comments: ----------- Start Original Message ----------- : Ultrasonics can be utilized with specialized high temp couplant. MT can be used but the issue of specialized consumables arises. PT is the simplest but again the need for a specialized penetrant and developer comes into play. It really depends on what type of cracks you're searching for... are they surface or sub-surface? 500 Celsius really isnt that hot. I've done examinations on considerably hotter surfaces. I believe the hottest was close to 900 celsius... though it was very difficult to get a reproduceable result... at that temperature minor fluctuations make huge differences on most UT sets. The set I found best for extreme high temperatures was the krautkramer USN58 series (L, K and I believe there's an N model too... my favorite is the L.... still use it today). hope some of this helps. : Jim ------------ End Original Message ------------ Optional Link URL: Example: "http://www....html". Alternative write "http://www.ndt.net/wshop/attach/filename.htm" if you transfered a filename.htm via FTP Page Title: is important! Optional Image URL: http://www....gif Attention! Please click the button only once. This may take a moment to process Forum Technical Discussions Help