1.1 本试验方法包括通过连续闭杯试验机测定燃料（包括柴油/生物柴油混合物、润滑油、溶剂和其他液体）的闪点，该试验机使用的试样尺寸为2 mL，杯径7 mL，加热速率为2.5 °C/分钟。 1.1.1 要求样品尺寸为1的仪器 mL，4杯 mL，加热速率为5.5 °C/分钟必须按照试验方法运行 D6450 . 1.2 这种闪点测试方法是一种动态方法，取决于一定的温度上升率。它是可用的许多闪点测试方法之一，包括这一种在内的每一种闪点测试方法都是经验方法。 注1: 闪点值不是测试材料的恒定物理化学性质。它们是设备设计、使用的设备条件和执行的操作程序的函数。 因此，闪点只能根据标准测试方法来定义，并且不能保证通过不同测试方法或指定不同测试设备获得的结果之间的一般有效相关性。 1.3 该试验方法使用一个封闭但未密封的杯子，将空气注入试验室。 1.4 本试验方法的精度适用于闪点为22.5的样品的试验 °C至235.5 °C。可进行低于或高于该范围的测定；然而，精度尚未确定。 1.5 如果用户规范要求除此方法以外的定义闪点方法，则在未获得比较数据和规定者同意的情况下，不得用此方法或任何其他测试方法代替规定的测试方法。 1.6 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。温度单位为摄氏度，压力单位为千帕斯卡。 1.7 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。 有关具体的警告语句，请参阅 7.2 和 8.5 . 1.8 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 闪点温度是在受控的实验室条件下，试样与空气形成可燃混合物的趋势的一种衡量标准。这只是评估材料整体易燃性危险时必须考虑的众多特性之一。 5.2 在运输和安全法规中使用闪点来定义 易燃的 和 易燃的 材料和用于分类目的。这一定义可能因法规而异。有关这些分类的精确定义，请参阅相关的特定法规。 5.3 本试验方法可用于测量和描述受控实验室条件下材料对热量和点火源的响应特性，不得用于描述或评估实际火灾条件下材料的火灾危险或火灾风险。 然而，该试验方法的结果可作为火灾风险评估的要素，该评估考虑了与特定最终用途的火灾危险评估相关的所有因素。 5.4 闪点还可以表明在相对不易挥发或不可燃的材料中可能存在高挥发性和易燃材料，例如少量柴油或汽油对润滑油的污染。该试验方法比试验方法对潜在污染更敏感 D6450 .

1.1 This test method covers the determination of the flash point of fuels including diesel/biodiesel blends, lube oils, solvents, and other liquids by a continuously closed cup tester utilizing a specimen size of 2 mL, cup size of 7 mL, with a heating rate of 2.5 °C per minute. 1.1.1 Apparatus requiring a specimen size of 1 mL, cup size of 4 mL, and a heating rate of 5.5 °C per minute must be run according to Test Method D6450 . 1.2 This flash point test method is a dynamic method and depends on definite rates of temperature increase. It is one of the many flash point test methods available and every flash point test method, including this one, is an empirical method. Note 1: Flash point values are not a constant physical chemical property of materials tested. They are a function of the apparatus design, the condition of the apparatus used, and the operational procedure carried out. Flash point can, therefore, only be defined in terms of a standard test method and no general valid correlation can be guaranteed between results obtained by different test methods or where different test apparatus is specified. 1.3 This test method utilizes a closed but unsealed cup with air injected into the test chamber. 1.4 The precision of this test method is applicable for testing samples with a flash point from 22.5 °C to 235.5 °C. Determinations below and above this range may be performed; however, the precision has not been established. 1.5 If the user’s specification requires a defined flash point method other than this method, neither this method nor any other test method should be substituted for the prescribed test method without obtaining comparative data and an agreement from the specifier. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Temperatures are in degrees Celsius, pressure in kilo-Pascals. 1.7 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 specific warning statements, see 7.2 and 8.5 . 1.8 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 flash point temperature is one measure of the tendency of the test specimen to form a flammable mixture with air under controlled laboratory conditions. It is only one of a number of properties which must be considered in assessing the overall flammability hazard of a material. 5.2 Flash point is used in shipping and safety regulations to define flammable and combustible materials and for classification purposes. This definition may vary from regulation to regulation. Consult the particular regulation involved for precise definitions of these classifications. 5.3 This test method can be used to measure and describe the properties of materials in response to heat and an ignition source under controlled laboratory conditions and shall not be used to describe or appraise the fire hazard or fire risk of materials under actual fire conditions. However, results of this test method may be used as elements of a fire risk assessment, which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. 5.4 Flash point can also indicate the possible presence of highly volatile and flammable materials in a relatively nonvolatile or nonflammable material, such as the contamination of lubricating oils by small amounts of diesel fuel or gasoline. This test method was designed to be more sensitive to potential contamination than Test Method D6450 .