Sealable Pipes are used to move items (electricity, oxygen, etc) inside a base with an oxygen sealer. In Galacticraft, there are three kinds of pipes, Sealable Oxygen Pipe, Sealable Aluminum Wire, and Sealable Heavy Aluminum Wire. They all function as normal pipes, but still maintain a proper seal.
Interaction with other mods
If you also have Buildcraft installed, sealable transport pipes, sealable fluid pipes, and sealable conductive pipes are added.
If you also have IndustrialCraft 2 installed, sealable cables are added.