1.1目的。本试验方法的目的是提供标准试验方法，以表征 “ 爆炸性 ” 从两个方面对尘埃云进行分析，首先通过确定灰尘是否 “ 可爆炸， ” 这意味着分散在空气中的粉尘云能够传播爆燃，从而可能导致闪火或爆炸；或者，如果是爆炸性的，确定 “ 爆炸性， ” 表示以粉尘爆炸性参数、最大爆炸压力、P为特征的尘云潜在爆炸危险 最大值 ; 最大升压速率（dP/dt） 最大值 ; 和爆炸指数K 圣 . 1.2限制。应用本标准方法获得的结果仅适用于分散尘云的某些燃烧特性。 不应从其他形式或条件下粉尘燃烧特性的相关结果中推断（例如，尘云的点火温度或火花点火能量、热表面粉尘层的点火特性、加热环境中大块粉尘的点火等） 1.3使用。旨在将通过应用本试验获得的结果用作考虑其他相关风险因素的爆炸风险评估要素；当与本领域技术人员批准或认可的设计方法结合使用时，在防爆系统规范中（例如，参见NFPA 68、NFPA 69和NFPA 654）。 笔记 1-历史上，最大压力和最大压力上升率的爆燃参数评估是使用1。 2-L哈特曼装置。试验方法 E789 描述该方法的已撤销。不建议在防爆系统设计中使用从试验方法获得的数据。 1.4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。 1.5 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法提供了进行实验室试验以评估粉尘爆燃参数的程序。 通过本试验方法得出的数据可与NFPA 68、ISO 6184/1或VDI 3673中发布的列线图和方程一起用于确定爆燃通风口的尺寸。 通过该测试技术获得的值特定于所测试的样品和使用的方法，不被视为固有材料常数。 适用于低浓度难燃粉尘 K 圣 -如中所述，非常强的点火器可能会使20升燃烧室超速 E1515 和Ref (1) . 如果灰尘可测量（非零） P 最大值 -和 K 圣 -在20-L燃烧室中使用5000或10000-J点火器但不使用2500-J点火器时，这可能是一个过驱动系统。在这种情况下，建议使用10000- J较大燃烧室中的点火器，如1米 3. 来确定它是否真的是可爆炸的。

1.1 Purpose. The purpose of this test method is to provide standard test methods for characterizing the “ explosibility ” of dust clouds in two ways, first by determining if a dust is “ explosible, ” meaning a cloud of dust dispersed in air is capable of propagating a deflagration, which could cause a flash fire or explosion; or, if explosible, determining the degree of “ explosibility, ” meaning the potential explosion hazard of a dust cloud as characterized by the dust explosibility parameters, maximum explosion pressure, P max ; maximum rate of pressure rise, (dP/dt) max ; and explosibility index, K St . 1.2 Limitations. Results obtained by the application of the methods of this standard pertain only to certain combustion characteristics of dispersed dust clouds. No inference should be drawn from such results relating to the combustion characteristics of dusts in other forms or conditions (for example, ignition temperature or spark ignition energy of dust clouds, ignition properties of dust layers on hot surfaces, ignition of bulk dust in heated environments, etc.) 1.3 Use. It is intended that results obtained by application of this test be used as elements of an explosion risk assessment that takes into account other pertinent risk factors; and in the specification of explosion prevention systems (see, for example NFPA 68, NFPA 69, and NFPA 654) when used in conjunction with approved or recognized design methods by those skilled in the art. Note 1—Historically, the evaluation of the deflagration parameters of maximum pressure and maximum rate of pressure rise has been performed using a 1.2-L Hartmann Apparatus. Test Method E789 , which describes this method, has been withdrawn. The use of data obtained from the test method in the design of explosion protection systems is not recommended. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== This test method provides a procedure for performing laboratory tests to evaluate deflagration parameters of dusts. The data developed by this test method may be used for the purpose of sizing deflagration vents in conjunction with the nomographs and equations published in NFPA 68, ISO 6184/1, or VDI 3673. The values obtained by this testing technique are specific to the sample tested and the method used and are not to be considered intrinsic material constants. For hard-to-ignite dusts with low K St -values, a very strong ignitor may overdrive a 20-L chamber, as discussed in E1515 and Ref (1) . If a dust has measurable (nonzero) P max - and K St -values with a 5000 or 10 000-J ignitor but not with a 2500-J ignitor in a 20-L chamber, this may be an overdriven system. In this case, it is recommended that the dust be tested with a 10 000-J ignitor in a larger chamber such as a 1-m 3 chamber to determine if it is actually explosible.