1.1 本规程描述了一种确定承受正压差的容器泄漏率的方法。该技术基于基于压力衰减测量评估测试对象内的质量变化。压力衰减测量使用理想气体状态方程和测量的压力、温度和时间来确定容器的质量损失。该方法不适用于可变形血管。 1.2 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。 1.3 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====== 5.1 设备、测试持续时间和技术应在测试开始前根据所需的测试灵敏度或准确性确定（见 附录A1和 附件A2 ). 如果测试用于证明容器具有最小规定泄漏率，则测试设备和测试持续时间的选择应具有比规范小十倍的分辨率和比规范小四倍的精度。 试验的设计应确保总压力变化小于10 % 启动压力。泄漏测试规范应规定容器测试压力或压差。如果测试规范未规定测试压力，则应使用符合适用安全标准的安全测试压力 8. .

1.1 This practice describes a method for determining the leakage rate of a vessel subject to a positive pressure difference. The technique is based upon evaluation of the change of mass within the test object based on a pressure decay measurement. The pressure decay measurement uses the ideal gas equation of state and the measured pressures, temperatures, and time to determine the mass loss from the vessel. This method does not apply to deformable vessels. 1.2 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. 1.3 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 ====== 5.1 The equipment, test duration, and technique should be determined before commencement of the test based on the required test sensitivity or accuracy (see Annex A1 and Annex A2 ). If the test is used to certify that the vessel has a minimum specified leakage rate, then the test equipment and test duration should be chosen to have a resolution ten times less than the specification and an accuracy which is four times less than the specification. The test should be designed so that the total pressure change is less than 10 % of the starting pressure. Leak test specifications should specify the vessel test pressure or differential pressure. If the test specification does not specify a test pressure, then a safe test pressure should be used that complies with the applicable safety standards 8 .