This SAE Surface Vehicle Recommended Practice deals with electrostatic charge phenomena that may occur in automotive fuel systems and applies to the following:

• Fuels that are in a liquid state at ambient temperatures and atmospheric pressures and are contained in vehicle fuel tanks that operate at or near atmospheric pressure. This includes gasoline and diesel fuels as well as their blends with additives such as alcohols, esters and ethers whether the additives are petroleum based or bio-fuel based.

• The group of components that comprise the fuel system (in contact and not in contact with fuels).

• Other components in proximity to the fuel system that may be affected by electrostatic fields caused by the fuel system.

• Electrostatic phenomena that arise from or are affected by the following aspects of vehicle or fuel system operation:

o Flowing fuel in the fuel delivery system

o Flowing fuel being dispensed to the vehicle while it is being fueled

Basic Approach

This recommended practice provides two approaches that may be used separately or collectively to ensure that there is no likelihood of adverse consequences resulting from electrostatic phenomena:

a) Recommendations for materials, components and subsystems to be used in conjunction with resistance, resistivity and dissipation time tests, noting that this is the conservative approach and may result in unnecessary use of these designs and materials for some specific applications.

b) Recommendations for the limits on electrical charge accumulation and transfer – with an indication of the advanced tests and analyses that must be conducted, noting that these tests and analyses require specialist personnel with the appropriate knowledge, experience, test equipment and testing environment.

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