1.1 本规程涵盖了获取、混合和处理挥发性燃料代表性样品的程序和设备，以测试是否符合适用于轻质燃料的挥发性相关测量标准。 1.2 本规程适用的干蒸汽压等效范围为13 kPa至110 千帕（2 psia至16 psia）。 1.3 本规程适用于重新配方燃料（包括含氧燃料）的取样、混合和处理。这种做法不适用于原油。有关原油的取样，请参阅实践 D4057 API MPMS 第8.1章，实践 D4177 API MPMS 第8.2章和实践 D8009 API MPMS 第8.5章。 1.4 以国际单位制表示的数值应视为标准，但在某些情况下，图纸可能显示英寸磅测量值，这是该设备的惯例。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 挥发性汽车燃料的蒸汽压参数由联邦和州空气污染控制机构监管。为了满足这些法规的要求，有必要按照本规范规定的精确方式对这些产品进行取样、处理和测试。 注1: 这种做法并不局限于挥发性的干蒸汽压力等效测试。干蒸汽压当量用于定义样品基质的范围。

1.1 This practice covers procedures and equipment for obtaining, mixing, and handling representative samples of volatile fuels for the purpose of testing for compliance with the standards set forth for volatility related measurements applicable to light fuels. 1.2 The applicable dry vapor pressure equivalent range of this practice is 13 kPa to 110 kPa (2 psia to 16 psia). 1.3 This practice is applicable to the sampling, mixing, and handling of reformulated fuels including those containing oxygenates. This practice is not applicable to crude oil. For the sampling of crude oil, refer to Practice D4057 /API MPMS Chapter 8.1, Practice D4177 /API MPMS Chapter 8.2, and Practice D8009 /API MPMS Chapter 8.5. 1.4 The values stated in SI units are to be regarded as the standard except in some cases where drawings may show inch-pound measurements, which are customary for that equipment. 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. 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 ====== 5.1 The vapor pressure parameters of volatile motor fuels are regulated by federal and state air pollution control agencies. In order to meet the letter of these regulations, it is necessary to sample, handle, and test these products in the precise manner as prescribed in this practice. Note 1: This practice is not limited to dry vapor pressure equivalent testing for volatility. Dry vapor pressure equivalent is used to define the range for the sample matrix.