ASTM G147-2009 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《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实施规程》.pdf
《ASTM G147-2009 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《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实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM G147-2009 Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests《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实施规程》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: G 147 09Standard Practice forConditioning and Handling of Nonmetallic Materials forNatural and Artificial Weathering Tests1This standard is issued under the fixed designation G 147; the number immediately following the designation indicates the year oforiginal adoption or, in the case o
2、f 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, identifica-tion, packing, shipping, handling, and
3、conditioning before,during, and after natural and artificial weathering testing.1.2 This practice includes details on the conditioning ofspecimens after exposure and before examination. This prac-tice also covers long-term storage of file specimens.1.3 Conditioning in this practice does not refer to
4、 thespecific act of exposing the specimens to the weatheringfactors.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the a
5、pplica-bility of regulatory limitations prior to use.NOTE 1There is no equivalent ISO standard describing procedures foridentification, shipping, conditioning, and handling of specimens intendedfor natural or artificial weathering tests. ISO 139 and ISO 291 describeprocedures used for conditioning s
6、pecimens prior to and during physicalproperty testing.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for TestingD 1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffusely-Illuminated Opaque MaterialsD 1776 Practice for Conditioning and Testi
7、ng TextilesD 3924 Specification for Environment for Conditioning andTesting Paint, Varnish, Lacquer, and Related MaterialsE41 Terminology Relating To ConditioningG7 Practice for Atmospheric Environmental ExposureTesting of Nonmetallic MaterialsG24 Practice for Conducting Exposures to Daylight Fil-te
8、red Through GlassG90 Practice for Performing Accelerated Outdoor Weath-ering of Nonmetallic Materials Using Concentrated Natu-ral SunlightG113 Terminology Relating to Natural and ArtificialWeathering Tests of Nonmetallic MaterialsG 151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test
9、 Devices that Use Laboratory Light SourcesG 152 Practice for Operating Open Flame CarbonArc LightApparatus for Exposure of Nonmetallic MaterialsG 153 Practice for Operating Enclosed Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG 154 Practice for Operating Fluorescent Light Apparatu
10、sfor UV Exposure of Nonmetallic MaterialsG 155 Practice for Operating Xenon Arc Light Apparatusfor Exposure of Non-Metallic Materials2.2 Other Documents:ISO 139 TextilesStandard Atmosphere for Conditioningand Testing3ISO 291 PlasticsStandard Atmospheres for Conditioningand Testing33. Terminology3.1
11、The definitions given in Terminologies E 41 and G 113are applicable to this practice.3.2 Unless otherwise stated, use of the term “specimens” inthis practice refers to specimens of the test material and of anyapplicable reference or control materials included as part of theexposure experiment.3.3 De
12、finitions of Terms Specific to This Standard:3.3.1 handling, nthe management of a specimen betweenexposure periods, or prior to, or after an exposure test.4. Significance and Use4.1 Weathering is an inherently variable science due to thefact that weather itself is variable. In addition, there can be
13、variability in results in artificial accelerated testing even when1This practice is under the jurisdiction of ASTM Committee G03 on Weatheringand Durability and is the direct responsibility of Subcommittee G03.01 on JointWeathering Projects.Current edition approved Feb. 1, 2009. Published March 2009
14、. Originallyapproved in 1996. Last previous edition approved in 2002 as G 14702.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page
15、onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、 19428-2959, United States.all devices are running identical exposure cycles. Therefore, itis essential to control all factors as much as possible in order toreduce the overall source of error.4.2 Proper handling of specimens is extremely important formaintaining the integrity of the material being
17、evaluated.Damage to specimens caused by improper handling andlabeling can adversely affect the validity of the testing pro-gram, causing loss of money and time. Improper handling canintroduce nonstandard procedures into the protocol which maybe a significant source of variability, adversely affectin
18、g theoverall precision of results obtained. Improper handling mayalso introduce a bias in the results obtained.4.3 Changes to materials can occur even under a seeminglybenign conditioning environment, especially if the specimenhas already been exposed. Therefore it is necessary to mini-mize the numb
19、er and length of non-testing periods in order thatthe exposure is 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 distortthe results from the exposure. Wear clean soft cotton gl
20、oves ifthe specimen will be touched on the exposed surface in orderto avoid exposing surfaces to skin oils.5.1.1 In climates where it is necessary to wear sunscreen,insect repellent, or other skin treatments, take extra precautionsthat these are not transferred to the test specimen.5.2 The front sur
21、face (that is, the side to be oriented towardsthe light source) is the primary surface of a test specimen.However, some three dimensional specimens may have morethan one primary surface. The primary surface(s) must remainfree of marks or damage not caused by the weatheringelements. Handle test speci
22、mens by the edges wheneverpossible.5.3 It is recommended that the test specimens be separatedduring shipment or storage. This ensures that the specimensurface will not be damaged by abrasion or by interaction withother specimens. For flat specimens, this can be accomplishedusing slotted containers o
23、r racks. If specimens are to bestacked, use of a smooth liner film or paper between adjacentspecimens is recommended. Non-textured paper, coated paperssuch as release liners, or unstabilized polyethylene or polyesterfilms are suitable protective layers.Any material placed againstthe face of the test
24、 specimens shall not contaminate or haveother interaction with the specimen that affects durability orappearance. For some materials, specimens can be stackedface-to-face. However, this is not recommended because of thedamage which can be caused by abrasion or interactionbetween the surfaces of adja
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMG1472009STANDARDPRACTICEFORCONDITIONINGANDHANDLINGOFNONMETALLICMATERIALSFORNATURALANDARTIFICIALWEATHERINGTESTS

链接地址:http://www.mydoc123.com/p-540386.html