(R) Fuel Systems and ComponentsElectrostatic Charge Mitigation
|Publication Date:||1 August 2006|
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.
• 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:
a. Flowing fuel in the fuel delivery system
b. Flowing fuel being dispensed to the vehicle while it is being fueled
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:
1. Recommendations for materials, components and subsystems to be used in conjunction with resistance and resistivity tests, noting that this is the conservative approach and may result in unnecessary use of these designs and materials for specific applications. See Section 4.1.
2. 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. See Section 4.2.
This 2005 version of the SAE J1645 Recommended Practice is an update of the January, 1999, publication. The reasons for the update were a significant amount of new information about testing procedures, acceptance criteria, criteria that may be used to justifuy exceptions to the recommended practice, and possible sources of variability in analyzing the performance of a fuel system in an electrostatic charging situation. Incorporating all those areas of improved information caused changes so numerous that they cannot be individually noted. This version of the J1645 document replaces the previous version.