意义和目的
4.1 在其推荐的法规中, the United Nations Committee of Experts on the Transport of Dangerous Goods places materials with flash points below 23°C (73.5°F) in Class II packaging. 然而, if viscous substances such as paints and related coatings, 粘合剂, polishers, ETC. meet certain requirements, they can be classified in Class III together with materials with flash points between 23 °C 和 60.5 ℃ (73.5 °F and 140 °F). One of the requirements is that less than 3% of the clear liquid is separated from most of the material when this test method is applied.

4.2 现在, most international regulatory bodies such as the International Civil Aviation Organization (国际民航组织) and the International Maritime Organization (IMO) use the UN recommendations. Most national transport regulators are expected to adopt the UN recommendations as their regulations for controlling the transport of hazardous materials. 现在, the United States allows the transshipment of hazardous materials through the United States to other countries in accordance with IMO and ICAO regulations.

美国材料试验协会D 4948-89-2022 秸秆浓液分离上层液量的测定

范围
1.1 该测试方法涵盖从粘性溶液或含有分散固体的分散体（例如油漆）中分离出的液体量, 搪瓷, 颜料漆, 粘合剂, 在一段时间内抛光和其他类似材料 24 小时.

笔记 1: 本次测试中分离出的澄清液体的量是《联合国危险货物运输建议书》的标准之一 2 将易燃粘性液体纳入与闪点相关的包装类别 (看 4.1).

1.2 以 SI 单位表示的值应被视为标准. 括号内的数值仅供参考.

美国材料试验协会D 4948-89-2022 秸秆浓液分离上层液量的测定

1.3 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.

1.4 本国际标准是根据《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则制定的, 世界贸易组织贸易技术壁垒委员会发布的指南和建议.