I've been spending some time learning refining and have a question I haven't been able to answer yet.
From my observations, heavy oil flows at a trickle. I'm trying to get a set of full lubrication tanks, but the rate of light oil and petroleum production constantly out paces. When watching my setup, the heavy oil is constantly flashing in the pipes. Is this typical? I'm working on creating more consumption of light and petroleum (solid fuel, etc), but the constant flashing is getting to me

I've attached a screenshot of my current setup. I know it's far from optimal, but this is just experimentation right now.