More Pipe I/O on Many Buildings

Many buildings could stand to have more pipe inputs/outputs for use in multiple recipes. Loose/unit items can be handled with sushi belts, but pipes don't permit multiple fluids, which is very limiting on some buildings.
1) Farms could use two fertilizer pipes for organic and inorganic fertilizer.
2) Cracking units and rubber makers often have alternate feedstocks but only enough pipe in/out for one recipe. For example, it would be nice to have one cracking unit handle excess naphtha, with the player prioritizing recipes rather than building two cracking units and having a balancer send naphtha to the correct unit.
3) Gas boilers really suffer from having only one pipe in, as many refineries will have, say, 2/3 of boiler's worth of naphtha, 1/2 of a boiler of heavy oil, 3/4 of a boiler of fuel gas, etc.

I particularly agree on the gas burner issue.