What sort of an installation is this referring to?
I know for a fact that choppers I have flown run on a variant of Kerosene and it has a flash point of about 250°C.
One other thing I do know, through experience as a FF, is that kerosene has the habit to change from a liquid to vapour very easily, about the same as propane, but not with the explosive force.
Unlike propane, the fumes from kerosene will drift upwards.
Let's face it, these days if you're not young, you're old - Red Green