This SAE Surface Vehicle Recommended Practice deals with electrostatic charge phenomena that may occur in automotive fuel systems. This document applies to the following: - Fuels that are liquid at global ambient temperatures and atmospheric pressures and are handled by vehicle fuel tanks that operate at pressures near atmospheric pressure. - The group of components that comprise the fuel system and those portions of the vehicle adjacent to the fuel system. - Electrostatic phenomena that arise from the following circumstances of vehicle or fuel system operation: a. Flowing fuel in the fuel delivery system b. Flowing fuel being dispensed to the vehicle while it it being fueled This recommended practice provides for materials, components and subsystems that can be robust to electrostatic charge pheonomena within the fuel system. The individual vehicle OEM should have responsibility for design requirements that apply to the entire fuel system and at the vehicle level. This document can provide guideance for how the OEM's might proceed.
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 justify 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.