Naphthenic Acid Corrosion
- Crude Unit Overhead heater tubes and lower alloy convection crossover piping are susceptible to corrosion damage when higher total asset number (TAN) crudes are processed.
- Periodic piping thickness measurement location (TML)’s and spot ultrasonic testing (UT) may not capture events that could cause significant wall loss of piping.
- Inaccessible locations generally do not allow for periodic monitoring.
- Rightrax, non-destructive testing (NDT) permanently-mounted sensors provide recordable, remotely accessible, high quality documentation of wall condition.
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| Crude unit convection cross over may suffer severe corrosion due to crude slate changes to higher TAN crudes | Naphthenic acid corrosion in crude unit piping |