Oxidation of external tube surfaces is responsible for metal loss at around 0.25 mm/yr, which limits tube life.
Oxidation of external tube surfaces is responsible for metal loss at around 0.25 mm/yr, which limits tube life. Scale growth produces an insulating layer that restricts conductive heat transfer to the process fluid and eventually limits production. Moreover, severe scaling also prevents accurate onstream monitoring of tube skin temperatures, using infrared (IR) thermography.
The application of proprietary high-emissivity ceramic coatingsa stopped oxidation in an aromatics plant. The units are no longer limited and are running at design capacity or above. Payback from the investment was within 6 mos.
Oxidation and scale growth of radiant tubes
Following a detailed root cause analysis, it w
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