A term used to describe the process of transferring fuel from a storage facility or tank into a tank truck or tank car for distribution.  Load Out Arm - See “Loading Arm” above.

A device used for loading or unloading that is usually a hard-piped extension of the piping system. The loading arm is usually assisted by a spring, a pneumatic or hydraulic cylinder and can be articulated by an operator to couple to or insert into a railcar or truck. The advantage of a loading arm over a typical loading hose is that it is ergonomically correct and operator friendly for repeated use and returns to the same position for storage.

A metric measurement used to calculate the volume displacement of an engine. One liter is equal to 1,000 cubic centimeters or 61 cubic inches.

A mixture of hydrocarbons found in natural gas and produced from crude oil, used principally as a feedstock for the chemical industry, home heating fuel, and motor vehicle fuel. Also known by the principal constituent propane.

A station, supplied with LNG, that pumps and vaporizes the liquid supply to vehicles as CNG fuel, generally at the correct pressure and temperature (i.e., the temperature effect of compression is factored into the design).


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