Selecting the right Crude Oil Distillation Unit begins with understanding the refinery's feedstock. Different crude oils can have significantly different densities, sulfur levels, acidity, metals content, salt content, and boiling-range distributions. A refinery processing light, low-sulfur crude may require a different configuration from one handling heavy or high-sulfur feedstocks. Feed variability should also be considered because a unit designed around a narrow crude specification may have limited flexibility when market conditions change. https://www.purepathtech.com/petroleum-refineries/crude-oil-distillation-unit