ASTM G147-2017發(fā)行信息

標準號ASTM G147-2017

中文名 自然與人工氣候試驗用非金屬材料的狀態(tài)調(diào)節(jié)和處理的標準規(guī)程

英文名 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests

發(fā)布日期2017

實施日期

廢止日期無

中國標準分類號A21 

國際標準分類號19.020 (Test conditions and procedures in general) 

發(fā)布單位US-ASTM

ASTM G147-2017適用范圍

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本規(guī)程涵蓋自然和人工風化試驗之前、期間和之后的試樣制備、識別、包裝、裝運、搬運和調(diào)節(jié)。

1.2本規(guī)程包括暴露后和檢查前試樣調(diào)節(jié)的細節(jié)。本規(guī)程還包括文件樣本的長期儲存。

1.3本規(guī)程中的調(diào)節(jié)不是指將試樣暴露在風化因子下的具體行為。

1.4本標準并非旨在解決與其使用相關(guān)的所有安全問題（如有）。本標準的使用者有責任在使用前建立適當?shù)陌踩徒】祵嵺`，并確定監(jiān)管限制的適用性。

注1：沒有同等的ISO標準描述用于自然或人工風化試驗的樣品的識別、裝運、調(diào)節(jié)和處理程序。ISO 139和ISO 291描述了物理性能測試之前和期間用于調(diào)節(jié)試樣的程序。

1.5本國際標準是根據(jù)世界貿(mào)易組織技術(shù)性貿(mào)易壁壘（TBT）委員會發(fā)布的《關(guān)于制定國際標準、指南和建議的原則的決定》中確立的國際公認標準化原則制定的。

Q-LAB的Q-SUN系列氙燈試驗箱符合ASTM G147-2017標準。