1.1 本规范涵盖通常称为液化石油气的产品，包括丙烷、丙烯（丙烯）、丁烷以及这些材料的混合物。提供了四种基本类型的液化石油气，以涵盖常见用途。 1.2 本规范适用于拟用作家庭、商业和工业供暖和发动机燃料的产品。 1.3 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.3.1 非国际单位制单位“psig”是脚注的标准单位 C/ 表1 因为这种计量单位在北美工业中被广泛使用。 1.4 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。 1.5 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。

1.1 This specification covers those products commonly referred to as liquefied petroleum gases, consisting of propane, propene (propylene), butane, and mixtures of these materials. Four basic types of liquefied petroleum gases are provided to cover the common use applications. 1.2 This specification is applicable to products intended for use as domestic, commercial and industrial heating, and engine fuels. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.3.1 The non-SI unit ‘psig’ is the standard unit for footnote C of Table 1 because that unit of measurement is widely used in North American industry. 1.4 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. 1.5 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.