Heya!

After looking through the list, I thought I would put one on your radar called "Call a Plumber", makes it where you have to have certain pipes/tanks for acid and another for lava.

Only complaints I noticed was the naming scheme might be off depending on a person's knowledge of the terms (aka, Refractory) + It currently doesn't affect offshore pumps. I also personally don't know where it puts itself research wise or it just EXISTS when you have normal pipes.

Felt this was close enough to vanilla to at least take a look? but can understand if it adds more tedium rather than another smaller challenge.

AAI Industry might be cool as well for extending burner phase?, but that is very likely going to far off track for what this hardcore mod intends.

Looks a fine inclusion, it's not too much to ask players to get the pipe right. The recipes and technology unlocks are sensible. Added as an optional dependency.