Piping (Straight)
Carries gases or water.
The plain pipe segment a run is built from, iron or steel, orienting itself to its neighbours as you place it. It is one of the four shapes that take part in over-pressure failure: one pipe holds 30 L at 1 atm, and the weakest plain pipe anywhere on a run, this one included, sets the burst rating for the whole run, 5 atm for iron and 10 for steel.
Hold that ceiling for 30 s with nowhere to vent and one pipe at the rating, chosen at random, lets go: its cell turns to air and the run splits in two at the gap.

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| any Hammer (tool, not consumed) | Plate (Iron or Steel) | Nails and strips (Iron or Steel) |
| Piping (Straight) x 2 | ||
Needs: 1 Plate (Iron or Steel), 1 Nails and strips (Iron or Steel), a Hammer (kept); makes 2 Piping (Straight)
Amounts are the mod's defaults; the recipe-cost level changes them (see Commands and config).