ASTM_D_4803_-_10.pdf

Designation:D480310An American National StandardStandard Test Method forPredicting Heat Buildup in PVC Building Products1This standard is issued under the fixed designation D4803;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 test method covers prediction of the heat buildup inrigid and flexible PVC building products above ambient airtemperature,relative to black,which occurs due to absorptionof the suns energy.NOTE1This test method is expected to be applicable to all types ofcolored plastics.The responsible subcommittee intends to broaden thescope beyond PVC when data on other materials is submitted for review.NOTE2There are no ISO standards covering the primary subjectmatter of this test method.1.2 Rigid PVC exterior profile extrusions for assembledwindows and doors are covered in Specification D4726.1.3 Rigid PVC exterior profiles for fencing are covered inSpecification F964.1.4 Rigid PVC siding profiles are covered in SpecificationD3679.1.5 Rigid PVC soffit profiles are covered in SpecificationD4477.1.6 Rigid PVC and Rigid CPVC plastic building productscompounds are covered in Specification D4216.1.7 The text of this test method references notes andfootnotes which provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of this test method.1.8 The values stated in inch-pound units are to be regardedas the standard.1.9 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 applica-bility of regulatory limitations prior to use.Specific safetyhazard statements are given in Section 7.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens,Plaques,or SheetsD3679 Specification for Rigid Poly(Vinyl Chloride)(PVC)SidingD4216 Specification for Rigid Poly(Vinyl Chloride)(PVC)and Related PVC and Chlorinated Poly(Vinyl Chloride)(CPVC)Building Products CompoundsD4477 Specification for Rigid(Unplasticized)Poly(VinylChloride)(PVC)SoffitD4726 Specification for Rigid Poly(Vinyl Chloride)(PVC)Exterior-Profile Extrusions Used for Assembled Windowsand DoorsE631 Terminology of Building ConstructionsF964 Specification for Rigid Poly(Vinyl Chloride)(PVC)Exterior Profiles Used for Fencing and Railing3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nologies D883 or E631 and abbreviations with TerminologyD1600 unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 heat buildupthe increase in temperature above thatof ambient air due to the amount of energy absorbed by aspecimen from the sun.3.2.2 temperature risethe increase in temperature abovethat of ambient(laboratory)air due to absorption of energyfrom a heating lamp(source).4.Summary of Test Method4.1 The PVC product(extruded product,injection moldedpart,or compression molded)is cut apart to obtain a flat testspecimen at least 3 by 3 by 0.060 6 0.020 in.(76 by 76 by 1.56 0.5 mm).1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved Nov.1,2010.Published January 2011.Originallyapproved in 1989.Last previous edition approved in 2002 as D4803-97(2002)1.DOI:10.1520/D4803-10.2For 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.*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 States1 4.2 The test specimen is heated under the infrared reflectiveheat lamp to determine the temperature rise above ambient(laboratory)temperature relative to a black control sample.4.3 The temperature rise data,obtained in the laboratory fora given test specimen,is then used to predict the heat buildup,which may occur outdoors due to the sun.5.Significance and Use5.1 Heat buildup in PVC exterior building products due toabsorption of the energy from the sun may lead to distortionproblems.Heat buildup is affected by the color,emittance,absorptance,and reflectance of a product.Generally,the darkerthe color of the product,the more energy is absorbed and thegreater is the heat buildup.However,even with the sameapparent color,the heat buildup may vary due to the specificpigment syste