Atmospheric Pipe Changes Megathread

[cheekybrdy]

Considering the main debate of welder Sisyphus currently, how about a advanced gas restoring pipes when leaked? I had a idea for a nanites gas that'd act as foamed metal when it went into a breach, could also just heal pipes. The idea I had also had it so if nanites were a certain percent of the gas on the tile it'd outright become a nanite on sparking.