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Teletest
Teletest Focus+ was the first system to use long-range guided wave ultrasonic testing to detect corrosion in pipelines.
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Technical Discussions
Nick Welland
Nick Welland
07:40 Sep-25-2003
Fluoro MT contamination

When commencing fluoro MT inside a paper mill deaerator our technician reports the premixed aerosol ink gives a bright white background fluorescence and is unusable. System was checked for proper performance before entering. The vessel is coated internally with graphite paint which is buffed off the welds and HAZ for inspection. I have not seen this particular effect before and suspect the paint residue is reacting with the ink in some way.
Does anyune have any further ideas?
Best Regards
Nick


    
 
 Reply 
 
Bruce Owen
Sales, Manufacturing
Lectromax Australia Pty Ltd, Australia, Joined Aug 2001, 2

Bruce Owen

Sales, Manufacturing
Lectromax Australia Pty Ltd,
Australia,
Joined Aug 2001
2
02:35 Sep-27-2003
Re: Fluoro MT contamination
Hi Nick, The graphite paint will be extremely difficult to completely remove from welds etc.,which will be necessary to avoid contamination of the fluro fluid. The buffing procedure will not be sufficiently effective, as the buff itself will qickly become contaminated and further spread the graphite. The graphite tends to enter the suface pores of the welds.. Sugest you try scrubbing the inspection areas using a safety solvent, eg Shell X55, with a stiff brush and plenty of clean rags, until the blacklight shows no contamination.
Hope this is of some help.
Bruce.----------- Start Original Message -----------
: When commencing fluoro MT inside a paper mill deaerator our technician reports the premixed aerosol ink gives a bright white background fluorescence and is unusable. System was checked for proper performance before entering. The vessel is coated internally with graphite paint which is buffed off the welds and HAZ for inspection. I have not seen this particular effect before and suspect the paint residue is reacting with the ink in some way.
: Does anyune have any further ideas?
: Best Regards
: Nick
------------ End Original Message ------------




    
 
 Reply 
 
Missy Elliott
Missy Elliott
06:30 Jul-11-2005
Missy Elliott

----------- Start Original Message -----------
: Hi Nick, The graphite paint will be extremely difficult to completely remove from welds etc.,which will be necessary to avoid contamination of the fluro fluid. The buffing procedure will not be sufficiently effective, as the buff itself will qickly become contaminated and further spread the graphite. The graphite tends to enter the suface pores of the welds.. Sugest you try scrubbing the inspection areas using a safety solvent, eg Shell X55, with a stiff brush and plenty of clean rags, until the blacklight shows no contamination.
: Hope this is of some help.
: Bruce.----------- Start Original Message -----------
: : When commencing fluoro MT inside a paper mill deaerator our technician reports the premixed aerosol ink gives a bright white background fluorescence and is unusable. System was checked for proper performance before entering. The vessel is coated internally with graphite paint which is buffed off the welds and HAZ for inspection. I have not seen this particular effect before and suspect the paint residue is reacting with the ink in some way.
: : Does anyune have any further ideas?
: : Best Regards
: : Nick
------------ End Original Message ------------

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