1.1 这种做法为在实验室评估运输单位承受分销环境的能力提供了统一的基础。这是通过对它们进行测试计划来实现的，该测试计划由不同分布周期中遇到的一系列预期危险因素组成。本规程无意取代材料规范或现有装运前试验程序。 1.2 考虑实践的使用 D7386 用于单个包裹运输的包裹测试。 1.3 尚未确定本规程是否适用于危险材料。 1.4 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 本规程为根据统一系统评估运输单位提供了指南，使用了代表实际分布水平的既定测试方法。 建议的测试水平基于运输和装卸环境的可用信息以及当前行业/政府的实践和经验 ( 1. 13 ) . 6. 应按照给定的顺序在相同的容器上依次进行测试。为了用作性能测试，本规程要求被测试的装运单元在测试序列完成之前保持未打开状态。如果用于其他目的，例如包开发，在整个序列的不同时间打开和检查运输单元可能会很有用。 然而，这可能会禁止评估容器封闭对容器性能的影响。 4.2 对于MIL-STD-2073–1中提到的分配循环18，本规程的使用在随后的DC-18章节中进行了定义。

1.1 This practice provides a uniform basis of evaluating, in a laboratory, the ability of shipping units to withstand the distribution environment. This is accomplished by subjecting them to a test plan consisting of a sequence of anticipated hazard elements encountered in various distribution cycles. This practice is not intended to supplant material specifications or existing preshipment test procedures. 1.2 Consider the use of Practice D7386 for testing of packages for single parcel shipments. 1.3 The suitability of this practice for use with hazardous materials has not been determined. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 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. 1.6 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 This practice provides a guide for the evaluation of shipping units in accordance with a uniform system, using established test methods at levels representative of those occurring in actual distribution. The recommended test levels are based on available information on the shipping and handling environment, and current industry/government practice and experience ( 1- 13 ) . 6 The tests should be performed sequentially on the same containers in the order given. For use as a performance test, this practice requires that the shipping unit tested remain unopened until the sequence of tests are completed. If used for other purposes, such as package development, it may be useful to open and inspect shipping units at various times throughout the sequence. This may, however, prohibit evaluating the influence of the container closure on container performance. 4.2 For Distribution Cycle 18, as referred to in MIL-STD-2073–1, the use of this practice is defined in subsequent sections identified as DC-18.