1.1 本规程涵盖了以1%的速率检测气体泄漏源的程序 × 10 –5 Pa m公司 3. /s（1 × 10 –4 标准cm 3. /s） 或更大。测试可以在任何物体上进行，该物体可以用可由热导检测器检测到的示踪气体加压。根据所用示踪气体的不同，测试灵敏度会有很大差异。 1.2 单位- 以国际单位制或标准立方厘米/秒单位表示的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，每个系统应独立于另一个系统使用。 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====== 5.1 这些测试方法可用于定位和估计加压气体泄漏的大小，作为质量控制测试或现场检查程序。此外，在采用其他更耗时和更敏感的泄漏测试之前，它们作为预测试很有价值。这些测试方法是用于定位泄漏的半定量技术，但除了近似值外，不能用于量化。这些测试方法可用于接受-拒绝测试模式。

1.1 This practice covers procedures for detecting the sources of gas leaking at the rate of 1 × 10 –5 Pa m 3 /s (1 × 10 –4 standard cm 3 /s) or greater. The tests may be conducted on any object that can be pressurized with a tracer gas that is detectable by a thermal conductivity detector. The test sensitivity will vary widely depending on the tracer gas used. 1.2 Units— The values stated in either SI or std-cc/sec 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 ====== 5.1 These test methods are useful for locating and estimating the size of pressurized gas leaks, either as quality control tests or as field inspection procedures. Also, they are valuable as pretests before other more time consuming and more sensitive leak tests are employed. These test methods are semi-quantitative techniques used to locate leaks but cannot be used to quantify except for approximation. These test methods may be used in an accept-reject test mode.