Factorio Forums

Hello,

apparently the steam condensation recipe in the chemnical plant is not being filled up with steam fast enough, even without any quality and just t2 speed modules (4.45 crafting speed chem plant).
The chemical plant next to it producing steam is fully backed up with 13k steam in the output slot (The pipe is still only 50% full though)
This only gets worse with quality / t3 speed modules apparently.

Might be the same issue as this one:
120867

Not sure it’s a bug, try using both inputs of the chem plant, fixed a similar input throughput issue on vulcanus for essentially the same thing

Edit: you may need to add pumps in some instances if it consumes a lot of fluid and is far away

Maybe a similar issue to this one fixed in 2.0.19?

"Fixed foundry was not able to reach declared speed of crafting holmium plates due to input fluid shortage. (120867)"

Hey, was searching around for an answer as I was having the same issue supplying a legendary cryo plant with steam. Not sure if I can call it a bug or not, but I fixed my issue by covering all steam inputs on the cryo plant. I see your chem plant similarly has one steam input disconnected.

Ref 124264 Steam Condensation input starved on very high craftig Speeds.

I'll bet this is related to the hidden internal fluid buffers raiguard was talking about wanting to remove.

I will say it's nonsensical that there are different throughput limits on the entrance/exit pipes versus just regular pipes. I've run into this with highly boosted foundries as well, where a single pipe taking molten metal output can't drain the foundry outputs fast enough. But if I connect the same single pipe to both outputs, then it does drain fully... into the same single pipe that it wouldn't fit into before.

I found this same issue, then proceeded to the Testing save, i found that keeping the 2 outputs separated, then immediately into several pumps, to support something around 5k per output, then join the outputs of the pumps gets the maximum that a Chem Plant can output. I found that chem plant directly into storage tanks, OR directly into pumps, was actually SLOWER than into a pipe, then into pumps.

I then later found that the Cryogenic Plant can do this same recipe, which STILL cannot handle the maximum with beacons etc. but the maximum is much higher, and the outputs do not need to be separated.

To give some context on this, the steam changes were introduced after the fluid rewrite and we didn't catch this problem. A solution I am working on is to change the fluid flow limitation from a linear relationship to a curve that will allow much higher max throughput while preserving the balancing behavior of input starvation scenarios.

Duplicate of 118644