1.1 这些测试方法涵盖了电气绝缘板的采样和测试。这些板是多孔的，通常是纤维板，用于电气设备中的电介质和结构用途。 1.2 这些试验方法不适用于测试硫化纤维或模压层压板。 1.3 这些试验方法适用于标称厚度至少为0.030英寸的板材。（0.76毫米）。 注1: 对于厚度小于0.030英寸的材料。（0.76 mm）见试验方法 D202型 . 1.4 试验方法见以下章节: 小节 材料协会标准 参考 表观密度 18 – 23 水提取物特性 36 – 42 D202型 灰分含量 43 – 46 T 413 与电介质的兼容性 液体 47 – 52 D664页 , D877 , D924 , D971 , D974 , D1169 , D1500 , D1816 , D3455 , D3487 压缩性 79 – 85 条件作用 11 D685 聚合度 86 – 89 D4243 空气中的介电强度 53 – 59 D149 油中的介电强度 60 – 65 D149 , D2413 , D3426 板材尺寸 12 – 17 含水量 31 – 35 D644 吸油量 72 – 78 报告 10 采样 6 – 9 D3636 收缩 24 – 30 D644 拉伸性能 66 – 71 D202型 1.5 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 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咨询并建立适当的安全、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。 ====意义和用途====== 19.1 表观密度影响绝缘板的介电和物理特性，是影响其在设备中使用的经济性的一个因素。该测试对于规范、设计和质量控制目的非常有用。

1.1 These test methods cover the sampling and testing of electrical insulating boards. These boards are porous, usually fibrous sheets used for dielectric and structural purposes in electrical apparatus. 1.2 These test methods are not intended for testing vulcanized fibre or molded laminated sheets. 1.3 These test methods are applicable to board materials having a nominal thickness of at least 0.030 in. (0.76 mm). Note 1: For materials thinner than 0.030 in. (0.76 mm) see Test Methods D202 . 1.4 The test methods appear in the following sections: Sections ASTM Method Reference Apparent Density 18 – 23 Aqueous Extract Characteristics 36 – 42 D202 Ash Content 43 – 46 T 413 Compatibility with Dielectric Liquids 47 – 52 D664 , D877 , D924 , D971 , D974 , D1169 , D1500 , D1816 , D3455 , D3487 Compressibility 79 – 85 Conditioning 11 D685 Degree of Polymerization 86 – 89 D4243 Dielectric Strength in Air 53 – 59 D149 Dielectric Strength in Oil 60 – 65 D149 , D2413 , D3426 Dimensions of Sheets 12 – 17 Moisture Content 31 – 35 D644 Oil Absorption 72 – 78 Reports 10 Sampling 6 – 9 D3636 Shrinkage 24 – 30 D644 Tensile Properties 66 – 71 D202 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 consult and 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. ====== Significance And Use ====== 19.1 Apparent density affects the dielectric and physical characteristics of insulating board and is a factor in the economics of its use in apparatus. This test is useful for specification, design, and quality control purposes.