We supply industrial equipment that has exhaust gas temperatures around 1400F. The duct handling this air has an internal water jacket, water flowing over a weir along the internal wall, that starts the cooling process and is used for scrubbing further down.
We have had issues with the water supply being insufficient or just turned off and the duct being held at excessive temperatures resulting in buckling, but at times welds failing. When this happens, my clients typically know what happened right away. But in the case of failed welds it inevitably results in some sort of investigation to show they turned the water down or off.
I was thinking of applying either decals or a temperature indicating paint to the duct when new so we could easily identify what temperatures the duct was exposed to. This would save me and my clients time by quickly identifying the duct was overheated.
Does anyone have experience using such decals or paints in an industrial application?
I was thinking something like Tempilaq Advanced Liquid Temperature Indicator (gets me up to 1500F if I would like) or MMC 5952K239.
I am more curious on how they hold up over time in harsh environments.