本SAE推荐实践规定了标准几何泄漏通道，以设置泄漏阈值并比较各种泄漏测试技术和测试条件的结果。本惯例适用于具有允许受管制的燃料或燃料蒸气持续逸出到大气中的风险的燃料系统组件和部件。根据本标准测试的部件或组件具有零HC泄漏阈值，因为所选泄漏通道（等效通道）将自堵塞并且不会释放可测量的烃液体或蒸汽。因此，该标准消除了作为蒸发排放源的泄漏。该实践主要针对加压和非加压燃料系统以及含有液态烃基燃料的部件而开发。

This SAE recommended practice specifies a standard geometry leak channel to set the leak threshold and compare results from a variety of leak test technologies and test conditions. This practice applies to fuel system assemblies and components which have a risk of allowing regulated fuel or fuel vapors to continuously escape to atmosphere. A component or assembly tested to this standard has a zero HC leakage threshold because the selected leak channel (Equivalent Channel) will self-plug and will not emit measurable hydrocarbon liquid or vapors. Therefore this standard eliminates leaks as a source of evaporative emission. This practice was primarily developed for pressurized and non-pressurized fuel systems and components containing liquid hydrocarbon based fuels.