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现行 ASTM F2621/F2621M-22
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Standard Practice for Evaluating Response Characteristics of Safety Products in an Electric Arc Exposure 评定电弧暴露中安全产品响应特性的标准实施规程
发布日期: 2022-04-01
1.1 本规程确定了在成品上进行电弧测试的协议,该成品用于可能接触电弧危害的工人的热防护。 1.1.1 本规程也适用于其他可能暴露于电弧但不需要电弧额定值的部件。 1.1.1.1 如果测试项目不符合相应标准,则样本提交人有责任在测试报告中提供该信息以供指示。 1.2 电弧防护用品通常使用本规程进行测试,以评估产品和其他电弧闪光PPE之间的界面区域的性能,或评估拉链和其他发现。 1.3 本规程不确定任何产品的电弧额定值。 如适用,可使用其他ASTM试验方法,如ASTM F1959/F1959M , F2178 和 F2675 . 1.4 本规程的目的不是产生电弧额定值,也不是在所有类型的电弧暴露中重复。 1.5 本规程与以下标准一起使用: 1.5.1 防护织物材料的电弧额定值来自试验方法 F1959/F1959M . 1.5.2 面部防护产品根据试验方法获得电弧额定值 F2178 . 1.5.3 手套根据试验方法获得电弧额定值 F2675 . 1.5.4 规范规定了防雨材料、发现物和封盖 F1891 . 1.5.5 服装由规格规定 F1506 . 1.6 本规程中使用的试样通常为电弧额定成品。 这些弧形成品可能包括但不限于单层服装、多层服装或套装、冷却背心、手套、袖子、chaps、雨衣、巴拉克拉瓦、面罩和带面罩窗口的面罩组件。当作为耐火系统的一部分时,可包括非电弧额定成品,或用于评估通过成品的热传递以防止事件再次发生,或用于评估所需但不可用的电弧额定产品(如呼吸器等) 1.7 arc额定成品样本是指已售出的新产品或在指定时间内用于预期目的的产品。 1.8 本规程用于确定arc的响应特性或设计完整性- 当暴露于受控实验室条件下电弧产生的辐射和对流能量时,成品形式的额定材料、产品或组件。 1.9 本规程可用于确定电弧暴露中闭合和接缝的完整性,在发生服装重叠或使用纹章反射饰条或其他物品的区域中电弧额定产品的保护性能,以及响应特性,如织物的余火时间、熔化、滴落、变形、收缩、着火或其他损坏或其组合,织物系统、易燃内衣(当作为系统的一部分时)、缝纫线、发现物和封口。 1.10 该实践可用于事件再现、培训演示和材料/设计比较。 1.11 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物;因此,为确保符合本标准,每个系统应独立使用,且两个系统的值不得组合。 1.12 本标准不得用于描述或评估实际火灾条件下材料、产品或组件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。 1.13 本标准无意描述或评估电弧碎裂爆炸和随后的熔融金属飞溅的影响,这涉及包含熔融金属和其他材料可能碎片的压力波,除非评估和报告了弹丸损坏的证据。 1.14 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。 有关具体预防措施,请参阅第节 7. . 1.15 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。 ====意义和用途====== 5.1 本规程可用于一系列目的,包括事件复制、开发改进的额定电弧防护产品,以及确定用于保护接触电弧的工人的新的或使用的额定电弧成品的响应特性和设计完整性。 5.1.1 在职服装可能有非常不同的洗涤和穿着历史。应用特定二手服装的测试结果时必须小心。需要考虑的因素包括服装的穿着历史、工作环境和穿着服装的任务;服装保养的方法和设施;服装被清洗或加工的次数;以及其他可能影响不同服装防护性能的因素。特定二手服装的测试结果应仅被视为可能从相同类型的其他二手服装中获得的结果的近似值。 5.1.2 在使用实践评估阻燃性时,应特别小心,因为电弧点火是一种统计现象。 20卡/厘米的曝光 2. 已被一致证明可评估大多数易燃材料,但根据涂层或特定纤维类型,有些材料可能需要更高的能量才能达到织物的断裂点。考虑使用垂直火焰测试,如测试方法 D6413 评估点火情况,并使用本规程进行说明。 5.2 本规程将试样保持在静态垂直位置,不涉及移动,但因暴露而产生的移动除外。
1.1 This practice identifies protocols for use in conducting arc testing on finished products intended for use as thermal protection by workers who may be exposed to electric arc hazards. 1.1.1 The practice is also used for other components which can be exposed to electric arc, but which do not require an arc rating. 1.1.1.1 If items are tested and they do not meet the appropriate standard, it is the responsibility of the specimen submitter to provide this information for indication in the test report. 1.2 Arc Rated protective items are typically tested using this practice to evaluate the performance of the interface area between the product and the other arc flash PPE or to evaluate zippers and other findings. 1.3 This practice does not establish an arc rating for any product. Other ASTM test methods are to be used when applicable such as ASTM F1959/F1959M , F2178 , and F2675 . 1.4 This practice is not intended to produce an arc rating and does not replicate in all types of arc exposures. 1.5 This practice is used with the following standards: 1.5.1 Protective fabric materials receive arc ratings from Test Method F1959/F1959M . 1.5.2 Face protective products receive arc ratings from Test Method F2178 . 1.5.3 Gloves receive arc ratings from Test Method F2675 . 1.5.4 Rainwear materials, findings and closures are specified by Specification F1891 . 1.5.5 Garments are specified by Specification F1506 . 1.6 The test specimens used in this practice are typically in the form of arc-rated finished products. These arc-rated finished products may include, but are not limited to, single layer garments, multi-layer garments or ensembles, cooling vests, gloves, sleeves, chaps, rainwear, balaclavas, faceshields, and hood assemblies with hood shield windows. Non-arc rated finished products may be included when part of a flame-resistant system, or for evaluating heat transmission through the finished product for incident reenactment, or for evaluation of products needed but not available as arc rated (such as respirators, etc.) 1.7 The arc rated finished product specimens are new products as sold or products which have been used for the intended purpose for a designated time. 1.8 This practice is used to determine the response characteristics or design integrity of arc-rated materials, products, or assemblies in the form of finished products when exposed to radiant and convective energy generated by an electric arc under controlled laboratory conditions. 1.9 This practice can be used to determine the integrity of closures and seams in arc exposures, the protective performance of arc-rated products in areas where garment overlap occurs or where heraldry reflective trim or other items are used, and response characteristics such as afterflame time, melting, dripping, deformation, shrinkage, ignition, or other damage, or combination thereof, of fabrics, systems of fabrics, flammable undergarments when included as part of a system, sewing thread, findings, and closures. 1.10 This practice can be used for incident reenactment, training demonstrations, and material/design comparisons. 1.11 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.12 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. 1.13 This standard does not purport to describe or appraise the effect of the electric arc fragmentation explosion and subsequent molten metal splatter, which involves the pressure wave containing molten metals and possible fragments of other materials except to the extent that evidence of projectile damage is assessed and reported. 1.14 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 . 1.15 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 practice can be used for a range of purposes including incident replication, development of improved arc rated protective products, and the determination of the response characteristics and design integrity of new or used arc rated finished products intended for use as protection for workers exposed to electric arcs. 5.1.1 In-service garments can have very different wash and wear histories. Caution must be used when applying test results from a particular used garment. Factors to consider include the garments’ wear histories, work environments, and tasks for which the garments were worn; the methods and facilities for garment maintenance; the number of launderings or processings the garments have been subjected to; and other factors that could impact the protective performance of different garments. Test results from specific used garments should be considered only an approximation of results that might be obtained from other used garments of the same type. 5.1.2 When using the practice for evaluating flame resistance, great care should be taken since ignition by electric arc is a statistical phenomenon. An exposure of 20 cal/cm 2 has been consistently shown to evaluate most ignitable materials but some may require higher energy to reach the breakopen point of the fabric depending on coatings or specific fiber types. Consider using a vertical flame test such as Test Method D6413 to evaluate for ignition and use this practice for illustration. 5.2 This practice maintains the specimen in a static, vertical position and does not involve movement except that resulting from the exposure.
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归口单位: F18.65
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