Renewable Fuel Pipeline Act of 2010 - Amends the Energy Policy Act of 2005 to allow federally-guaranteed loans for renewable fuel pipelines in amounts equal to 80% of the project cost of the facility that is the subject of the guarantee, as estimated at the time the guarantee is issued.
Defines "renewable fuel" to mean fuel that: (1) is produced from renewable biomass and that is used to replace or reduce the quantity of fossil fuel present in a transportation fuel; and (2) includes ethanol and biodiesel.