本试验方法旨在测量高温下通过弹性体或复合材料结构的低渗透软管或管道样品的燃料渗透。该方法的预期精度约为样品渗透速率的+/-10%。 软管渗透测试可以通过两种方式进行:方法A-即插即用或方法B-使用油箱。 方法A包括堵塞软管的一端，用测试燃料填充样品至约90%，堵塞另一端，然后将堵塞的样品暴露于所需的测试温度，并随时间测量重量损失。 方法B包括塞住软管的一端，然后将另一端连接到油箱。然后将软管样品和储液器暴露于期望的测试温度，并随时间测量重量损失。 本程序提供了一种推荐的塞子设计，允许在添加测试流体之前插入塞子。其中一个塞子有一个小的填充孔，带有一个确保低渗透的衬垫系统。这种设计防止了在插入具有高插入力的插塞时，通过对燃料填充配置加压而产生的装配问题。 方法A适用于具有低表面体积比的样品，因此试验期间的燃料损失百分比很低，并且由此产生的燃料成分变化不会显著影响渗透速率（CE10燃料的燃料损失通常小于10%）。当方法A的燃油损失过大时，应使用方法B。这通常在软管直径小（小于18mm）且渗透率高的情况下进行。为方法B选择的贮存器的大小取决于样品的渗透速率，并且应足够大，以确保试验期间的燃料损失小于约10%。 可接受的燃料损失量取决于燃料成分和测试材料类型。非环境条件（如温度）变化导致的重量损失与时间曲线的线性一致偏差应被视为可疑区域，可能是组分或构型变化导致的，可能会影响渗透速率。 标准渗透试验温度为40℃和60℃。标准试验燃料为燃料C和燃料CE10。 其他燃料，如燃料CM15和其他挥发性液体，可根据需要根据该程序进行测试。该方法不适用于测量在试验温度下不会从外部样品表面完全蒸发的高沸点材料的渗透。

This test method is intended for measuring fuel permeation at elevated temperature through low permeating hose or tubing samples of elastomeric or composite construction. The expected accuracy of the method is about +/-10% of the sample permeation rate. Hose permeation testing can be done two ways: Method A - Plug and Fill or Method B - using a fuel reservoir. Method A involves plugging one end of the hose, filling the sample to about 90% full with test fuel, plugging the other end, and then exposing the plugged sample to a desired test temperature, with the weight loss measured over time. Method B involves plugging one end of a hose, and then connecting the other end to a fuel reservoir. The hose sample and reservoir are then exposed to a desired test temperature with the weight loss measured over time. This procedure presents a recommended plug design that permits inserting the plugs prior to adding the test fluid. One of the plugs has a small fill hole with a gasketing system that insures low permeation. This design prevents assembly problems created by pressurizing a fuel filled configuration, when inserting plugs with high insertion forces. Method A is intended for samples with low surface to volume ratios, so that the % fuel loss over the test period is low, and the resultant fuel compositional change does not significantly affect the permeation rate (typically less than 10% fuel loss for CE10 fuel). Method B should be used when fuel loss with Method A would be too large. This is typically done where hoses are small diameter (less than 18 mm) and have high permeation rates. The size of the reservoir chosen for Method B depends on the permeation rate of the sample and should be large enough to assure that fuel loss over the test period is less than about 10%. The amount of fuel loss that might be acceptable will depend on the fuel composition and the type of material tested. Uniform deviations from linearity of the weight loss versus time curves that are not a result of changes in environmental conditions such as temperature should be considered suspect regions and could be a result of compositional or configurational changes might be affecting the permeation rate. Standard permeation test temperatures are 40 degrees C and 60 degrees C. Standard test fuels are Fuel C and Fuel CE10. Other fuels, such as Fuel CM15, and other volatile liquids may be tested according to this procedure as desired. The method is not applicable for measuring permeation of higher boiling materials that will not completely evaporate from the exterior sample surface at the test temperature.