Thank you!❤️ Pipes themselves don’t have a flow limit. Throughput is determined only by connected machines: how much fluid enters the network and how much the outputs can consume. For example, a mixer won’t output 20 u/s unless the pipe segment after it has machines consuming 20 u/s. In the current version (1.0.2), some factories already move over 900 u/s through a single pipe.
EDIT: Btw, I’ve listened to the player feedback, and copy/paste feature will be added in the next major update, version 1.1.