ASTM_D_4329_-_21.pdf

Designation:D432921Standard Practice forFluorescent Ultraviolet(UV)Lamp Apparatus Exposure ofPlastics1This standard is issued under the fixed designation D4329;the number immediately following the designation indicates the year oforiginal adoption or,in the case 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 specific procedures and test condi-tions that are applicable for using a fluorescent UV lamp andwater apparatus exposure of plastics conducted in accordancewith Practices G151 and G154.This practice also covers thepreparation of test specimens,the test conditions best suited forplastics,and the evaluation of test results.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1This standard and ISO 4892-3 address the same subjectmatter,but differ in technical contact.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD5870 Practice for Calculating Property Retention Index ofPlasticsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG141 Guide for Addressing Variability in Exposure Testingof Nonmetallic MaterialsG147 Practice for Conditioning and Handling of Nonmetal-lic Materials for Natural and Artificial Weathering TestsG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet(UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG169 Guide for Application of Basic Statistical Methods toWeathering TestsG177 Tables for Reference Solar Ultraviolet Spectral Distri-butions:Hemispherical on 37 Tilted Surface2.2 ISO Standard:3ISO 4892-3 PlasticsMethods of Exposure to LaboratoryLight SourcesPart 3,Fluorescent UV Lamps2.3 SAE Standard:4SAE J2020 Accelerated Exposure of Automotive ExteriorMaterials Using a Fluorescent UV and CondensationApparatus3.Terminology3.1 For definitions of terms relating to plastics used in thispractice,refer to Terminology D883.3.2 For definitions of terms relating to precision and biasand associated used in this practice,refer to Terminology E456.3.3 For definitions of terms relating to weathering used inthis practice,refer to Terminology G113.4.Significance and Use4.1 The ability of a plastic material to resist deteriorationcaused by exposure to light,heat,and water is a property ofsignificance in many applications.This practice is intended toinduce property changes associated with end-use conditions,including the effects of ultraviolet solar irradiance,moisture,and heat.The exposure used in this practice is not intended to1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.50 on Durability of Plastics.Current edition approved July 1,2021.Published July 2021.Originally approvedin 1984.Last previous edition approved in 2013 as D4329-13.DOI:10.1520/D4329-21.2For 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 onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1simulate the deterioration caused by localized weatherphenomena,such as,atmospheric pollution,biological attack,and saltwater exposure.(WarningVariation in operatingconditions