1.1 本规程涵盖了通过气泡发射技术检测或定位泄漏或两者的程序。定量测量是不现实的。本试验方法的正常灵敏度极限为4.5 × 10 −10 摩尔/秒（1 × 10 −5. 标准cm 3. /s） 。 2. 1.2 描述了两种技术: 1.2.1 浸入技术，以及 1.2.2 液体应用技术。 注1: 更多信息见ASME锅炉及压力容器规范第五节第10条泄漏测试和指南 E479 . 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准无意解决与其使用相关的安全问题（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。 1.5 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====== 6.1 浸泡技术经常用于定位密封容器中的泄漏。容器中的泄漏可以单独看到。泄漏大小可以近似为气泡的大小。 它不适合测量系统总泄漏量。 6.2 液膜技术广泛应用于不易浸入的部件和系统，并用于快速定位泄漏。可以根据形成的气泡类型来近似泄漏尺寸，但该技术不适用于测量泄漏率。它可以与真空箱一起使用，以测试无法加压或只有一侧可接近的容器。 6.3 准确性- 这种做法的目的不是测量泄漏率，而是在通、不通的基础上定位泄漏。其定位泄漏的精度为4.5 × 10 −10 摩尔/秒（1 × 10 −4. 标准cm 3. /s） 2. 大于等于±5 %. 定位较小泄漏的准确性取决于操作员的技能。 6.4 重复性- 在通过和不通过的基础上，由同一操作员进行的重复测试的差异不应超过±5 % 4.5泄漏 × 10 −9 摩尔/秒（1 × 10 −4. 标准cm 3. /s） 。 2. 6.5 再现性- 在通过和不通过的基础上，由其他受过培训的操作员进行的重复测试的差异不应超过10 % 4.5泄漏 × 10 −9 摩尔/秒（1 × 10 −4. 标准cm 3. /s） 2. 更大。

1.1 This practice covers procedures for detecting or locating leaks, or both, by bubble emission techniques. A quantitative measure is not practical. The normal limit of sensitivity for this test method is 4.5 × 10 −10 mol/s (1 × 10 −5 Std cm 3 /s). 2 1.2 Two techniques are described: 1.2.1 Immersion technique, and 1.2.2 Liquid application technique. Note 1: Additional information is available in ASME Boiler and Pressure Vessel Code, Section V, Article 10-Leak Testing, and Guide E479 . 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address 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. 1.5 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 ====== 6.1 The immersion technique is frequently used to locate leaks in sealed containers. Leaks in a container can be seen independently. Leak size can be approximated by the size of the bubble. It is not suitable for measurement of total system leakage. 6.2 The liquid film technique is widely applied to components and systems that can not easily be immersed and is used to rapidly locate leaks. An approximation of leak size can be made based on the type of bubbles formed, but the technique is not suitable for measuring leakage rate. It can be used with a vacuum box to test vessels which cannot be pressurized or where only one side is accessible. 6.3 Accuracy— This practice is not intended to measure leakage rates, but to locate leaks on a go, no-go basis. Their accuracy for locating leaks of 4.5 × 10 −10 mol/s (1 × 10 −4 Std cm 3 /s) 2 and larger is ±5 %. Accuracy for locating smaller leaks depends upon the skill of the operator. 6.4 Repeatability— On a go, no-go basis, duplicate tests by the same operator should not vary by more than ±5 % for leaks of 4.5 × 10 −9 mol/s (1 × 10 −4 Std cm 3 /s). 2 6.5 Reproducibility— On a go, no-go basis, duplicate tests by other trained operators should not vary by more than 10 % for leaks of 4.5 × 10 −9 mol/s (1 × 10 −4 Std cm 3 /s) 2 and larger.