1.1 该试验方法用于确定拟用作暴露于电弧中的工人的阻燃服的材料的电弧额定值，电弧会产生约2100 kW/m的热通量 2. [50卡/厘米 2. s] 使用露天电弧。 1.2 该试验方法将确定满足以下要求的材料的电弧额定值:小于150 毫米[6 根据试验方法进行试验时，煤焦长度和小于2 s的余火 D6413 . 1.2.1 本试验方法的目的不是评估非阻燃材料。 1.3 本试验方法中使用的材料为扁平试样。 1.4 该试验方法应用于测量和描述材料、产品或组件在受控实验室条件下对电弧产生的对流能和辐射能的响应特性。 1.5 以国际单位制表示的数值应视为标准，除非另有说明。在文本中，备用单位显示在括号中。每个系统中规定的值可能不是精确的等效值，因此必须独立使用其他系统。将文本中描述的系统的值组合在一起可能会导致与该方法不一致。 1.6 本试验方法不适用于电接触或电击危险。 1.7 本标准不得用于描述或评估材料、产品或组件在实际火灾条件下的火灾危险或火灾风险。然而，该试验的结果可作为火灾评估的要素，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。 1.8 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。 有关具体预防措施，请参阅第节 7. . 1.9 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 本试验方法旨在确定一种材料或多种材料组合的电弧额定值。 5.1.1 由于电弧暴露的可变性，可以在各个传感器处观察到不同的热传递值。根据第节评估每个传感器的结果 12 . 5.2 该试验方法将试样保持在静止、垂直的位置，除暴露外，不涉及移动。 5.3 本试验方法规定了在受控实验室条件下进行的一组标准电弧暴露。不同的暴露条件有可能产生不同的结果。除了标准的暴露条件外，还可以使用代表预期危害的其他条件，并应记录在测试结果报告中。

1.1 This test method is used to determine the arc rating of materials intended for use as flame resistant clothing for workers exposed to electric arcs that would generate heat flux rates of approximately 2100 kW/m 2 [50 cal/cm 2 s] using an open air arc. 1.2 This test method will determine the arc rating of materials which meet the following requirements: less than 150 mm [6 in.] char length and less than 2 s afterflame when tested in accordance with Test Method D6413 . 1.2.1 It is not the intent of this test method to evaluate non flame-resistant materials. 1.3 The materials used in this test method are in the form of flat specimens. 1.4 This test method shall be used to measure and describe the properties of materials, products, or assemblies in response to convective and radiant energy generated by an electric arc under controlled laboratory conditions. 1.5 The values stated in SI units shall be regarded as standard except as noted. Within the text, alternate units are shown in brackets. The values stated in each system may not be exact equivalents therefore alternate systems must be used independently of the other. Combining values from the systems described in the text may result in nonconformance with the method. 1.6 This test method does not apply to electrical contact or electrical shock hazards. 1.7 This standard shall not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. 1.8 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 precautions, see Section 7 . 1.9 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 This test method is intended for the determination of the arc rating of a material, or a combination of materials. 5.1.1 Because of the variability of the arc exposure, different heat transmission values may be observed at individual sensors. Evaluate the results of each sensor in accordance with Section 12 . 5.2 This test method maintains the specimen in a static, vertical position and does not involve movement except that resulting from the exposure. 5.3 This test method specifies a standard set of arc exposures performed under controlled laboratory conditions. Different exposure conditions have the potential to produce different results. In addition to the standard set of exposure conditions, other conditions representative of the expected hazard may be used and shall be documented in the reporting of the testing results.