ASTM_C_1058_-_C_1058M_-_10_2015.pdf

Designation:C1058/C1058M10(Reapproved 2015)Standard Practice forSelecting Temperatures for Evaluating and ReportingThermal Properties of Thermal Insulation1This standard is issued under the fixed designation C1058/C1058M;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 practice covers standard mean temperatures forreporting thermal properties of thermal insulations,products,and materials,and of related systems and components,bothinsulated and uninsulated.1.2 Thermal properties shall be determined as a function oftemperature by standard test methods.(Test Methods C177,C201,C335/C335M,C518,C745,C1114,C1363,Guide C653,and Practice C687,all in combination with Practice C1045.)NOTE1Standard referenced materials are needed to span the tem-perature range of the tests.1.3 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.1.4 This practice recommends standard conditions for use intesting and evaluating thermal properties as a function oftemperature by standard test methods.1.5 General applications of thermal insulations include:1.5.1 Building envelopes,1.5.2 Mechanical systems or processes,and1.5.3 Building and industrial insulations.1.6 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.2.Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC201 Test Method for Thermal Conductivity of RefractoriesC335/C335M Test Method for Steady-State Heat TransferProperties of Pipe InsulationC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC653 Guide for Determination of the Thermal Resistance ofLow-Density Blanket-Type Mineral Fiber InsulationC687 Practice for Determination of Thermal Resistance ofLoose-Fill Building InsulationC745 Test Method for Heat Flux Through Evacuated Insu-lations Using a Guarded Flat Plate Boiloff Calorimeter(Withdrawn 2008)3C1045 Practice for Calculating Thermal Transmission Prop-erties Under Steady-State ConditionsC1114 Test Method for Steady-State Thermal TransmissionProperties by Means of the Thin-Heater ApparatusC1363 Test Method for Thermal Performance of BuildingMaterials and Envelope Assemblies by Means of a HotBox Apparatus3.Terminology3.1 DefinitionsFor definitions of terms and symbols usedin this practice,refer to Terminology C168.1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.30 on ThermalMeasurement.Current edition approved March 1,2015.Published May 2015.Originallyapproved in 1986.Last previous edition approved 2010 as C1058/C1058M 10.DOI:10.1520/C1058_C1058M-10R15.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 The various methods for measuring and calculatingthermal properties provide data and information for manufac-turers published information,for comparison of relatedproducts,and for designers and users to evaluate insulationproducts for particular applications.For these purposes it isadvisable to provide basic data and information producedunder standard temperature conditions.4.2 It is possible that thermal properties of a specimen willchange with mean temperature,with temperature differenceacross the specimens,and with high temperature exposure.Data and information at standard temperatures are necessaryfor valid comparison of thermal properties.4.3 The mean test temperatures to measure thermal proper-ties shall be selected from those listed in Table 1.It isrecommended that thermal properties of insulation materials beevaluated over a mean temperature range that represents theintended end use.For this situation,the lowest and greatestmean temperatures need to be within 10C of the maximumand minimum mean temperature of interest.The temperaturediffer