1.1 本规程涵盖了通过在部件内部用液体加压来测试部件是否泄漏。 1.2 本规程可用于具有焊接或安装段的管道、阀门和容器，这些焊接或安装段可在其端部密封，并设计用于内部压力。 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 −9 摩尔/秒（1 × 10 −4. 标准cm 3. /s） 2. 或更大。 1.4 单位- 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸-磅单位的数学转换，仅供参考，不被视为标准值。 1.5 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。 1.6 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 本规程适用于对预计会保留液体的管道系统、管道、阀门和容器进行质量控制测试和现场检查。当有毒或爆炸性气体预计在压力下保留时，它对泄漏测试不够敏感。

1.1 This practice covers the testing of components for leaks by pressurizing them inside with a liquid. 1.2 This practice can be used on piping, valves, and containers with welded or fitted sections which can be sealed at their ends and which are designed for internal pressure. 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 −9 mol/s (1 × 10 −4 Std cm 3 /s) 2 or larger. 1.4 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.5 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. 1.6 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 practice is useful for quality control testing and field inspection of piping systems, pipelines, valves, and containers that are expected to retain liquids. It is not sensitive enough for leak testing when toxic or explosive gas is expected to be retained under pressure.