38. In special cases, the Commandant of the Coast Guard may permit cargo piping to pass through machinery spaces, what are the type (s) of cargo permitted to be carried through such piping?

The Commandant may permit cargo piping through machinery spaces only for Grade E combustible liquids due to their reduced fire risk; higher grades (A, B, D) and liquefied flammable gases (LFG) are prohibited by regulations designed to mitigate fire and explosion hazards in machinery spaces.