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18566398802标准号ASTM G147-2017
中文名 自然与人工气候试验用非金属材料的状态调节和处理的标准规程
英文名 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
发布日期2017
实施日期
废止日期无
中国标准分类号A21
国际标准分类号19.020 (Test conditions and procedures in general)
发布单位US-ASTM
Weathering is an inherently variable science due to the fact that weather itself is variable. In addition, there can be variability in results in artificial accelerated testing even when all devices are running identical exposure cycles. Therefore, it is essential to control all factors as much as possible in order to reduce the overall source of error.
Proper handling of specimens is extremely important for maintaining integrity of the material being evaluated. Damage to specimens caused by improper handling and labeling can adversely affect the validity of the testing program, causing loss of money and time. Improper handling can introduce nonstandard procedures into the protocol which may be a significant source of variability, adversely affecting the overall precision of results obtained. Improper handling may also introduce a bias in the results obtained.
Changes to materials can occur even under a seemingly benign conditioning environment, especially if the specimen has already been exposed. Therefore it is necessary to minimize the number and length of non-testing periods in order that the exposure is the only cause of further changes.
1.1 This practice covers specimen preparation, identification, packing, shipping, handling, and conditioning before, during, and after natural and artificial weathering testing.
1.2 This practice includes details on the conditioning of specimens after exposure and before examination. This practice also covers long-term storage of file specimens.
1.3 Conditioning in this practice does not refer to the specific act of exposing the specimens to the weathering factors.
1.4 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.
NOTE 1:There is no equivalent ISO standard describing procedures for identification, shipping, conditioning, and handling of specimens intended for natural or artificial weathering tests. ISO 139 and ISO 291 describe procedures used for conditioning specimens prior to and during physical property testing.
1.5 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.
1.1本规程涵盖自然和人工风化试验之前、期间和之后的试样制备、识别、包装、装运、搬运和调节。
1.2本规程包括暴露后和检查前试样调节的细节。本规程还包括文件样本的长期储存。
1.3本规程中的调节不是指将试样暴露在风化因子下的具体行为。
1.4本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全和健康实践，并确定监管限制的适用性。
注1：没有同等的ISO标准描述用于自然或人工风化试验的样品的识别、装运、调节和处理程序。ISO 139和ISO 291描述了物理性能测试之前和期间用于调节试样的程序。
1.5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。
Q-LAB的Q-SUN系列氙灯试验箱符合ASTM G147-2017标准。