Personally, I'd suggest something like this. Obviously, this is a picture of my smelter setup, but it would work well with iron and copper plate instead. As long as both sides of the science factory are using product at roughly similar rates, it will draw evenly from both lanes of the plate input.

nuhll wrote:Whats missing?

It's missing a building that can handle the input, I think. Recipe has 5 fluids, and I'm pretty sure the most any can handle is 3 (the petrochem advanced refinery or whatever it's called).

As for your other question, plastic - and the rest of the oil industry - is...complicated. There's not really a "basic" way of obtaining it. As far as I can tell, the earliest possible way to get plastic is using propene in an advanced chemical plant , though there are quicker and more ef...