Crude Oil Distillation (CDU/VDU)

The crude oil distillation unit, encompassing both atmospheric and vacuum sections, is one of the most critical process units in a refinery. With the increasing sulfur and acid content in processed crude slates, it becomes essential for the distillation unit to remain adaptable and flexible enough to handle a wide range of feedstocks. However, such variability in feed composition can exacerbate corrosion damage mechanisms, including sulfidation, naphthenic acid corrosion, and under-deposit corrosion, particularly in high-temperature zones such as furnace tubes, transfer lines, and vacuum resid sections. Additionally, areas such as column overhead lines and overhead condensers are susceptible to acidic corrosion caused by hydrogen chloride, or under-deposit corrosion originating from ammonium chloride or amine hydrochloride deposits.
#Corrosion Monitoring in CDU;#Sulfidation; #NAP Acid Corrosion; #HCl Corrosion; #NH₄Cl Corrosion