ASTM_C_1303_-_C_1303M_-_15.pdf

Designation:C1303/C1303M15Standard Test Method forPredicting Long-Term Thermal Resistance of Closed-CellFoam Insulation1This standard is issued under the fixed designation C1303/C1303M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for predicting thelong-term thermal resistance(LTTR)of unfaced or permeablyfaced rigid gas-filled closed-cell foam insulations by reducingthe specimen thickness to accelerate aging under controlledlaboratory conditions(1-5).2NOTE1See Terminology,3.2.1,for the meaning of the word agingwithin this standard.1.2 Rigid gas-filled closed-cell foam insulation includes allcellular plastic insulations manufactured with the intent toretain a blowing agent other than air.1.3 This test method is limited to unfaced or permeablyfaced,homogeneous materials.This method is applied to awide range of rigid closed-cell foam insulation types,includingbut not limited to:extruded polystyrene,polyurethane,polyisocyanurate,and phenolic.This test method does notapply to impermeably faced rigid closed-cell foams or to rigidclosed-cell bun stock foams.NOTE2See Note 8 for more details regarding the applicability of thistest method to rigid closed-cell bun stock foams.1.4 This test method utilizes referenced standard test proce-dures for measuring thermal resistance.Periodic measurementsare performed on specimens to observe the effects of aging.Specimens of reduced thickness(that is,thin slices)are used toshorten the time required for these observations.The results ofthese measurements are used to predict the long-term thermalresistance of the material.1.5 The test method is given in two parts.The PrescriptiveMethod in Part A provides long-term thermal resistance valueson a consistent basis that can be used for a variety of purposes,including product evaluation,specifications,or product com-parisons.The Research Method in part B provides a generalrelationship between thermal conductivity,age,and productthickness.1.5.1 To use the Prescriptive Method,the date of manufac-ture must be known,which usually involves the cooperation ofthe manufacturer.1.6 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.7 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.1.8 Table of Contents:SectionScope1Reference Documents2Terminology3Summary of Test Method4Significance and Use5Part A:The Prescriptive Method6Applicability6.1Qualification Requirements6.1.1Facing Permeability6.1.2Apparatus6.2Sampling6.3Schedule6.3.1Specimen Preparation6.4Goal6.4.1Schedule6.4.2Replicate Test Specimen Sets6.4.3Specimen Extraction6.4.4Slice Flatness6.4.5Slice Thickness6.4.6Stack Composition6.4.7Storage Conditioning6.5Test Procedure6.6Thermal Resistance Measurement Schedule6.6.1Thermal Resistance Measurements6.6.2Product Density6.6.3Calculations6.7Part B:The Research Method7Background7.1TDSL Apparatus7.2Sampling Schedule7.3Specimen Preparation7.4Storage Conditioning7.5Test Procedure7.6Calculations7.71This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.30 on ThermalMeasurement.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 1995.Last previous edition approved in 2014 as C1303 14.DOI:10.1520/C1303_C1303M-15.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Reporting8Reporting for Part A,the Prescriptive Method8.1Reporting for Part B,the Research Method8.2Precision and Bias9Keywords10Mandatory Information QualificationAnnexA1Specimen PreparationA1.1Homogeneity QualificationA1.2Thermal Conductivity Equivalence Test ProcedureA1.3Alternate Product Thickness QualificationA1.4Example CalculationsA1.5Mandatory Information-Preparation of Test Specimens forSpray-Foam ProductsAnnexA2Effect Of TDSLAppendixX1History of the StandardAppendixX2Theory of Foam AgingAppendixX3References2.Referenced Documents2.1 ASTM Standards:3C168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC518 Test Method for Steady-State