The washoil is a product that is heavier than HVGO and is used to "wash" the bottom section of the vaccum column. So,on the vaccum column you produce destillates, LVGO, HVGO and washoil (can be called also "slopwax"). Each of these streams has a drum (except the distillate).
The crude slates...
Hi,
On the past weeks a failure happened on a washoil drum (Vaccum unit) due to sulfidic corrosion (bottom area of the drum). This drum was never replaced (original from 1993 - P5 metallurgy) and until 2014 had very low corrosion rates even with high sulfur crudes (2.5-3.5% sulfur on washoil)...
