Source : Webster's Revised Unabridged Dictionary (1913)

Pipage \Pip"age\, n.
   Transportation, as of petroleum oil, by means of a pipe
   conduit; also, the charge for such transportation.

Source : WordNet®

pipage
     n 1: a fee charged for the use of pipes
     2: a long tube made of metal or plastic that is used to carry
        water or oil or gas etc. [syn: {pipe}, {piping}]