ASTM G147-2017 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《自然和人工老化试验用非金属材料修整和处理的标准实施规程》.pdf
《ASTM G147-2017 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《自然和人工老化试验用非金属材料修整和处理的标准实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM G147-2017 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《自然和人工老化试验用非金属材料修整和处理的标准实施规程》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: G147 09G147 17Standard Practice forConditioning and Handling of Nonmetallic Materials forNatural and Artificial Weathering Tests1This standard is issued under the fixed designation G147; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers specimen preparation, identification, packing, shipping, handling,
3、and conditioning before, during, andafter natural and artificial weathering testing.1.2 This practice includes details on the conditioning of specimens after exposure and before examination. This practice alsocovers long-term storage of file specimens.1.3 Conditioning in this practice does not refer
4、 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 responsibilityof the user of this standard to establish appropriate safety and health practices and determine
5、the applicability of regulatorylimitations prior to use.NOTE 1There is no equivalent ISO standard describing procedures for identification, shipping, conditioning, and handling of specimens intended fornatural or artificial weathering tests. ISO 139 and ISO 291 describe procedures used for condition
6、ing specimens prior to and during physical propertytesting.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations iss
7、uedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque MaterialsD1776 Practice for
8、 Conditioning and Testing TextilesD3924 Specification for Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials (Withdrawn2016)3E41 Terminology Relating To ConditioningG7 Practice for Atmospheric Environmental Exposure Testing of Nonmetallic MaterialsG24 Practice fo
9、r Conducting Exposures to Daylight Filtered Through GlassG90 Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural SunlightG113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonm
10、etallic Materials in Accelerated Test Devices that Use Laboratory Light SourcesG152 Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic MaterialsG153 Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic MaterialsG154 Practice for
11、 Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials2.2 Other Documents:4ISO 139 TextilesStandard Atmosphere for Conditioning and TestingISO 291 PlasticsStandard Atmosp
12、heres for Conditioning and Testing1 This practice is under the jurisdiction of ASTM Committee G03 on Weathering and Durability and is the direct responsibility of Subcommittee G03.01 on JointWeathering Projects.Current edition approved Feb. 1, 2009June 1, 2017. Published March 2009June 2017. Origina
13、lly approved in 1996. Last previous edition approved in 20022009 asG147 02.G147 09. DOI: 10.1520/G0147-09.10.1520/G0147-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, ref
14、er to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an
15、 ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. I
16、n all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Ter
17、minology3.1 The definitions given in Terminologies E41 and G113 are applicable to this practice.3.2 Unless otherwise stated, use of the term “specimens” in this practice refers to specimens of the test material and of anyapplicable reference or control materials included as part of the exposure expe
18、riment.3.3 Definitions of Terms Specific to This Standard:3.3.1 handling, nthe management of a specimen between exposure periods, or prior to, or after an exposure test.4. Significance and Use4.1 Weathering is an inherently variable science due to the fact that weather itself is variable. In additio
19、n, there can be variabilityin results in artificial accelerated testing even when all devices are running identical exposure cycles. Therefore, it is essential tocontrol all factors as much as possible in order to reduce the overall source of error.4.2 Proper handling of specimens is extremely impor
20、tant for maintaining the integrity of the material being evaluated. Damageto specimens caused by improper handling and labeling can adversely affect the validity of the testing program, causing loss ofmoney and time. Improper handling can introduce nonstandard procedures into the protocol which may
21、be a significant source ofvariability, adversely affecting the overall precision of results obtained. Improper handling may also introduce a bias in the resultsobtained.4.3 Changes to materials can occur even under a seemingly benign conditioning environment, especially if the specimen hasalready be
22、en exposed.Therefore it is necessary to minimize the number and length of non-testing periods in order that the exposureis the only cause of further changes.5. General Handling Procedures5.1 Handle all test specimens with care and attention. Physical damage resulting from improper handling can disto
23、rt the resultsfrom the exposure. Wear clean soft cotton gloves if the specimen will be touched on the exposed surface in order to avoid exposingsurfaces to skin oils.5.1.1 In climates where it is necessary to wear sunscreen, insect repellent, or other skin treatments, take extra precautions thatthes
24、e are not transferred to the test specimen.5.2 The front surface (that is, the side to be oriented towards the light source) is the primary surface of a test specimen. However,some three dimensional specimens may have more than one primary surface. The primary surface(s) must remain free of marksor
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