Pressure vessel internal coating damage
Pressure vessel internal coating damage
(OP)
Dear All,
I have very limited knowledge of Thermography and I am seeking guidance on feasability of a possible application.
Wondering if Thermography has been or could be used to reliably detect presence of localised internal coating breakdown on a lined (similar to glass flake application, around 600 microns thick) pressure vessel or tank.
Inspection would be performed whilst onstream, with the vessels/tanks containing hydrocarbon product at typically 50-100 degC.
Vessel/Tank wall thicknesses will range from around 10-30mm nominal.
External coating is a grey, gloss-type finish.
I would obviously follow-up any indicated internal coating loss with conventional NDE techniques to check for any metal loss.
Any relevant experiences?
I have very limited knowledge of Thermography and I am seeking guidance on feasability of a possible application.
Wondering if Thermography has been or could be used to reliably detect presence of localised internal coating breakdown on a lined (similar to glass flake application, around 600 microns thick) pressure vessel or tank.
Inspection would be performed whilst onstream, with the vessels/tanks containing hydrocarbon product at typically 50-100 degC.
Vessel/Tank wall thicknesses will range from around 10-30mm nominal.
External coating is a grey, gloss-type finish.
I would obviously follow-up any indicated internal coating loss with conventional NDE techniques to check for any metal loss.
Any relevant experiences?





RE: Pressure vessel internal coating damage
You can probably do what you want, but it might take some creativity on your part.
The internal glass lining will act as an insulator somewhat, so you might be able to see the cooler areas where the lining is good.
Try to get data during a windy or cool day and see if convection cooling is helping to reveal the areas where the lining might be missing.
If there are large swings in your product temperature you might be able to see the areas during those transients.
Greg F
RE: Pressure vessel internal coating damage
The method is very simple and direct without any FFT or Spectrum. With a bit of skill to capture the temperature difference Thermography can be improvised in any application.
RE: Pressure vessel internal coating damage
This technology is available on a retrofit as well as new build basis.
Complete temperature profiles can be displayed on a PC or alternativly a graphical user interface can be provided that mimics the vessel with different temperatures represented by different colours.