Pipes can only transport compatible fluids. You weren't going to put molten iron in an iron pipe, were you? Can be customized by other mods.
Mods introducing new content into the game.
Things related to oil and other fluids.
it seems like all of the Maraxis fluids (Saline, brackish, Hydrogen, Oxygen) blow up both Iron and Plastic pipes
That is the default behavior for unrecognized fluids. As a user of the mods, you can put fluid names in the "Inert fluids" setting, as described in the "Information" tab, to make unrecognized fluids work.
I did do that yes. took a little doing to discover all the names.
A compatibility update has been added to Maraxis.
