1.1 本规程涵盖大型单壁和双壁储罐、压力和真空容器、层压、衬里或双壁零件、复杂管道系统、柔性容器（如飞机燃油箱）、混合包装中的玻璃到金属密封件以及固有含有或将含有氨的系统（如大吨位制冷系统和肥料储存系统）的测试。 1.2 该方法可用于具有焊接、装配或层压部分的管道、阀门和容器，这些部分可在其端部或其外壁和内壁之间密封，并设计用于34的内部压力。 5 kPa[5 psig]或更大。 1.3 根据使用的检查类型描述基本程序。这些程序应限于查找4.5的泄漏指示 × 10 − 12 摩尔/秒[1 × 10 − 7. 标准cm 3. /s] 2. 或更大。 1.4 单位- Std cm中规定的值 3. /s或mol/s应单独视为标准。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.5 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。 （有关更具体的安全预防信息，请参阅 7.4 , 8.2 , 9.4.1 和 10.3.1 ). 1.6 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 该方法可用于定位和测量气体泄漏的大小，作为质量控制测试或现场检查程序。它可用于测试关键部件或盛装有毒或爆炸性气体或液体的容器，或作为其他容器的快速测试。

1.1 This practice covers the testing of large single- and double-walled tanks, pressure and vacuum vessels, laminated, lined- or double-walled parts, complex piping systems, flexible containers (such as aircraft fuel tanks), glass-to-metal seals in hybrid packages, and systems that inherently contain or will contain ammonia (such as large tonnage refrigeration systems and fertilizer storage systems). 1.2 This method can be used on piping, valves, and containers with welded, fitted, or laminated sections that can be sealed at their ends or between their outer and inner walls and that are designed for internal pressures of 34.5 kPa [5 psig] or greater. 1.3 Basic procedures are described based on the type of inspection used. These procedures should be limited to finding leakage indications of 4.5 × 10 − 12 mol/s [1 × 10 − 7 Std cm 3 /s] 2 or larger. 1.4 Units— The values stated in Std cm 3 /s or mol/s are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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. (For more specific safety precautionary information see 7.4 , 8.2 , 9.4.1 , and 10.3.1 ). 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 ====== 6.1 This method is useful for locating and measuring the size of gas leaks either as a quality-control test or as a field-inspection procedure. It can be used to test critical parts or containers that will hold toxic or explosive gases or liquids or as a quick test for other containers.