1.1 本规程适用于乙醇浓度大于适用于传统燃料车辆且低于最低乙醇含量规范限值的汽车火花点火式发动机燃料的混合 D5798 . 这些中级乙醇混合燃料用于柔性燃料汽车，有时在零售时被称为“乙醇弹性燃料” 1.2 这些中级乙醇燃料混合物仅适用于配备火花点火发动机的地面柔性燃料车辆。灵活燃料汽车设计用于使用符合规范要求的汽油或汽油-乙醇混合物 D4814 ，符合规范要求的乙醇燃料混合物 D5798 ，或这些的任意组合。 在美国，这些车辆经美国环保局认证为符合这些类型燃料的排放。 1.3 中级乙醇燃料混合物应从以下任一种中混合: 1.3.1 符合规范要求的变性燃料乙醇 D4806 降低无机氯化物含量限制，确保成品燃料和符合规范的火花点火发动机燃料中的无机氯化物含量不超过1 mg/kg D4814 （通常在配电站或散装工厂），或 1.3.2 符合规范的乙醇燃料混合物 D5798 来自符合规范的火花点火发动机燃料 D4814 （通常在零售点）。 1.4 本规程描述了混合各种mid所需的程序- 在散装配送点或零售/商业交付点为柔性燃料汽车调配乙醇燃料。当买方和供应商之间达成协议时，这些要求可适用于生产和分销系统中的其他点。 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 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。 1.7 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 practice applies to the blending of automotive spark-ignition engine fuels with ethanol concentrations greater than those suitable for conventional-fuel vehicles and less than the minimum ethanol content specification limits of Specification D5798 . These mid-level ethanol fuel blends are for use in flexible-fuel vehicles and are sometimes referred to at retail as “Ethanol Flex Fuel.” 1.2 These mid-level ethanol fuel blends are only suitable for use in ground flexible-fuel vehicles equipped with spark-ignition engines. Flexible-fuel vehicles are designed to operate on gasoline or gasoline-ethanol blends that meet the requirements of Specification D4814 , ethanol fuel blends that meet the requirements of Specification D5798 , or any combination of these. In the United States, these vehicles are certified by the U.S. EPA as emissions compliant with these types of fuels. 1.3 The mid-level ethanol fuel blend shall be blended from either: 1.3.1 Denatured fuel ethanol conforming to the requirements of Specification D4806 with a reduced limit on inorganic chloride content that will ensure no more than 1 mg/kg inorganic chloride in the finished fuel and from spark-ignition engine fuel conforming to Specification D4814 (often at a distribution terminal or bulk plant), or 1.3.2 Ethanol fuel blends conforming to Specification D5798 and from spark-ignition engine fuel conforming to Specification D4814 (often at a retail site). 1.4 This practice describes the required procedures for blending various mid-level ethanol fuel blends for flexible-fuel vehicles at the bulk distribution point or retail/commercial delivery site. These requirements may be applied at other points in the production and distribution system when provided by agreement between the purchaser and the supplier. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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.