# 6 Oil Viscosity Cutting vs Flash
# 6 Oil Viscosity Cutting vs Flash
(OP)
To control our # 6 oil viscosity, we can cut with the following cutterstocks,
crude unit diesel flash ~ 180 °F
merox kerosene flash ~ 160 °F
distillate hydrotreater diesel flash ~ 180 °F
visbreaker gas oil flash ~ 190 °F
At times, usually when we're cutting with a lot of kerosene, the #6 oil flash will be < 150 °F.
How can this be, when the individual component flash points are > 150 °F? Are there any guidelines or mixing rules that apply? Or is there some other phenomenon going on here?
Thx Brian
crude unit diesel flash ~ 180 °F
merox kerosene flash ~ 160 °F
distillate hydrotreater diesel flash ~ 180 °F
visbreaker gas oil flash ~ 190 °F
At times, usually when we're cutting with a lot of kerosene, the #6 oil flash will be < 150 °F.
How can this be, when the individual component flash points are > 150 °F? Are there any guidelines or mixing rules that apply? Or is there some other phenomenon going on here?
Thx Brian





RE: # 6 Oil Viscosity Cutting vs Flash
Representative sampling -of the components and the blends- seems to play a role. For example, if the components have a "range" of FP, due to layering of some sort or unsuccesful mixing, or to changes in processing. Low sulphur diesels can go as low as 125oF, and aviation kerosines "minimum" specs call for 100oF.
Keep us posted on any discovery, for us to learn from your experience.