1.1 这些试验方法确定了通过某些运输方式（如支线飞机或高山通道地面）运输包装产品时压差的影响。这些测试的结果旨在用于定性目的。 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。 将两个系统的值合并可能会导致不符合标准。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 通过支线飞机网络运输的包装产品可能会经历高达5791米[19000英尺]的高度。 4. 当暴露在这些高海拔条件下时，产品或包装系统或其组合可能会受到合成压差的负面影响。 4.2 这些测试方法适用于评估高空对包装系统的影响。 4.3 这些测试方法适用于包装或产品，或同时适用于开发和工程。 4.4 其他测试方法，如测试方法 D3078 , D4991 和 D5094 ，通过真空方法测试包装系统的泄漏，适用于测试高海拔的影响。

1.1 These test methods determine the effects of pressure differential when packaged products are transported by meansn of certain modes of transport, such as feeder aircraft or ground over high mountain passes. The results of these tests are intended to be used for qualitative purposes. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Packaged products transported by meansn of the feeder aircraft network are liable to experience altitudes as high as 5 791 m [19 000 ft]. 4 When exposed to these high altitude conditions, products or packaging systems, or a combination thereof, may be affected negatively by the resultant pressure differential. 4.2 These test methods are suitable for evaluating the effect of high altitude on packaging systems. 4.3 These test methods are suitable for package or product, or both, development and engineering. 4.4 Other test methods, such as Test Methods D3078 , D4991 and D5094 , test for leakage of packaging systems by vacuum method and are applicable for testing the effects of high altitude.