1、Designation: C 1058 03 (Reapproved 2008)Standard Practice forSelecting Temperatures for Evaluating and ReportingThermal Properties of Thermal Insulation1This standard is issued under the fixed designation C 1058; the number immediately following the designation indicates the year oforiginal adoption
2、 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. Scope1.1 This practice covers standard mean temperatures forreporting thermal propert
3、ies 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 C 177,C 201, C 236, C 335, C 518, C 745, C 976, C 1114, GuideC 653,
4、and Practice C 687, all in combination with PracticeC 1045.)NOTE 1Standard referenced materials are needed to span the tem-perature range of the tests.1.3 This practice recommends standard conditions for use intesting and evaluating thermal properties as a function oftemperature by standard test met
5、hods.1.4 General applications of thermal insulations include:1.4.1 Building envelopes,1.4.2 Mechanical systems or processes, and1.4.3 Building and industrial insulations.1.5 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly. Appr
6、oximate inch-pound units are provided in the tables.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
7、 regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal InsulationC 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC 201 Test Method for Thermal Condu
8、ctivity of Refracto-riesC 335 Test Method for Steady-State Heat Transfer Proper-ties of Pipe InsulationC 518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC 653 Guide for Determination of the Thermal Resistanceof Low-Density Blanket-Type Mineral
9、 Fiber InsulationC 687 Practice for Determination of Thermal Resistance ofLoose-Fill Building InsulationC 745 Test Method for Heat Flux Through Evacuated Insu-lations Using a Guarded Flat Plate Boiloff CalorimeterC 1045 Practice for Calculating Thermal TransmissionProperties Under Steady-State Condi
10、tionsC 1114 Test Method for Steady-State Thermal TransmissionProperties by Means of the Thin-Heater ApparatusC 1363 Test Method for Thermal Performance of BuildingMaterials and Envelope Assemblies by Means of a HotBox Apparatus3. Terminology3.1 Definitions For definitions of terms and symbols usedin
11、 this practice, refer to Terminology C 168.4. Significance and Use4.1 The various methods for measuring and calculatingthermal properties provide data and information for manufac-turers published information, for comparison of related prod-ucts, and for designers and users to evaluate insulation pro
12、d-ucts for particular applications. For these purposes it isadvisable to provide basic data and information producedunder standard temperature conditions.4.2 Thermal properties of a specimen may change withmean temperature, with temperature difference across thespecimens, and with high temperature e
13、xposure. Data andinformation at standard temperatures are necessary for validcomparison of thermal properties.4.3 The mean test temperatures to measure thermal proper-ties shall be selected from those listed in Table 1.Itisrecommended that thermal properties of insulation materials beevaluated over
14、a mean temperature range that represents theintended end use. For this situation, the lowest and greatest1This 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 Aug. 1,
15、2008. Published August 2008. Originallyapproved in 1986. Last previous edition approved 2003 as C 1058 03.2For 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 standa
16、rds Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.mean temperatures should be within 10C of the maximum andminimum mean temperature of interest. The temperature dif-ferences for any chosen m
17、ean temperature will depend uponboth the thermal insulation application (see appropriate mate-rials specification), the method of evaluation, and the limita-tions of the apparatus. Temperature differences or relevanttemperatue conditions required by ASTM material specifica-tions shall take precedenc
18、e over those recommended in thispractice.4.3.1 Standard conditions are presented where both surfacesare exposed to fixed ambient temperatures that are typical fortesting building constructions, both insulated and uninsulated(Table 2).4.3.2 Standard conditions are presented where the tempera-tures of
19、 the two surfaces are fixed and surface coefficients arenot considered (Table 3).4.3.3 For conditions where the temperature of only onesurface is fixed with the other exposed to fixed ambienttemperature, use the mean temperatures of Table 1.4.4 These conditions must be stated to describe accuratelyt
20、hermal properties such as thermal conductivity versus meantemperature for thermal insulating materials. Thermal insula-tions exhibiting inflection points due to the change of state ofinsulating gases (see Note 2), must be tested at sufficientlysmall temperature differences between (1) the hot and co
21、ldsides and (2) between mean temperatures. The test temperaturedifferences used depend on the vapor pressure versus tempera-ture relationship of the gases involved and the ability of the testapparatus to provide accurate measurements of low tempera-ture differences.NOTE 2Certain closed-cell cellular
22、 plastic insulations are of this type.5. Procedure5.1 Since there are distinctly different needs or uses forthermal performance information, the test conditions selectedmust be appropriate to the need or use.5.2 Determine the use classification described in 5.3 andchoose the appropriate temperature
23、conditions from the tables.5.2.1 If the tables do not contain the appropriate temperatureconditions, specifically report exceptions.5.3 Thermal insulation classifications are:5.3.1 Building EnvelopesTypically, building assembliesor constructions, both insulated and uninsulated, are tested withboth s
24、urfaces exposed to fixed ambient temperatures as pre-scribed in Table 2. Normally, Test Method C 1363 is used forevaluation of building assemblies. For building envelopes inmoderate climates with an anticipated exterior temperaturerange of 0 to 50C (nominally 30 to 120F), recommendedmean temperature
25、s are 4, 24, and 43C (40, 75 and 110F).5.3.2 Mechanical Processes or Systems and Building andIndustrial InsulationsEvaluations of thermal performanceare generally limited to a single material where data is neededfor codes, specifications, and technical literature. Evaluationsinvolve either (1) fixin
26、g both surface temperatures as pre-scribed in Tables 2 and 3 or (2) fixing one surface temperaturewith the other exposed to a fixed ambient temperature using themean temperatures of Table 1 and Test Method C335. Formechanical systems and processes for applications from -100to 150C (nominally -200 to
27、 300F), recommended meanTABLE 1 Mean Test Temperatures for Reporting and Evaluationof Thermal Properties of Thermal InsulationsInsulation ClassificationMean Test TemperatureC FABuilding Envelopes 4 2544010 5024 7538 10043 110Mechanical Systems or Processes and Buildingand Industrial Insulations: Use
28、 those listed in thistable above and the following:200 300100 20075 10050 5025 0100 200150 300200 400250 500300 600350 700400 800500 1000600 1200700 1400800 16001000 18001100 2000AThe values in degrees Fahrenheit given in this table are not intended to beexact conversions of those values in degrees
29、Celsius.TABLE 2 Standard Temperatures for Thermal Transmittance Evaluations With Both Specimen Surfaces Exposed to FixedAmbient TemperaturesATemperature, CBTemperature, FBMean Hot AmbientCCold AmbientCMean Hot AmbientCCold AmbientC4 24 6 5 326 525756 9 25 6 94246 5 156 540 6 956 910 24 6 546 55 6 92
30、56 924 38 6 5106 5 75 100 6 06 938 52 6 6 5 100 125 6 976 943 63 6 46 5 110 145 6 56 9AThermal transmission properties of panels of various building constructions are thermal transmittance (U), and thermal conductance (C).BCelsius temperatures are standard. The values in degrees Fahrenheit given in
31、this table are not intended to be exact conversions of those values given in degreesCelsius.CAmbient temperatures other than shown may be required for applications other than normal building interior ambient temperatures. Thermal properties should bedetermined from test data using ambient temperatur
32、es suitable for the applications, but the change must be reported.C 1058 03 (2008)2temperatures are those in 5.3.1 plus 100 and -50C (200 and-50F). For industrial applications from -200 to 600C (nomi-nally -300 to 1200F), recommended mean temperatures are-100, 24, 150, 300, and 500C (-200, 75, 300,
33、600, and1000F).6. Keywords6.1 building envelope; industrial application; mean testtemperature; mechanical process; selecting temperatures; ther-mal insulation; thermal propertyASTM International takes no position respecting the validity of any patent rights asserted in connection with any item menti
34、onedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee a
35、nd must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting
36、of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Bo
37、x C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE
38、 3 Standard Temperatures for Thermal Transmission Property Testing and Evaluation Both Surface Temperatures FixedANOTE 1Typical for use with Test Methods C 177, C 201, C 518, and C 1114.Temperature, CBTemperature, FBMeanTemperature DifferenceCDMeanTemperature DifferenceCDSmall Large Small Large200 2
39、56 5 100 6 20 300 506 10 200 6 30100 25 6 5 200 6 20 200 50 6 10 300 6 3075 25 6 5 150 6 20 100 50 6 10 300 6 3050 25 6 5 150 6 20 50 50 6 10 300 6 2025 25 6 5 100 6 10 0 50 6 10 300 6 204 256 5506 10 25 50 6 10 100 6 20426 546 10 40 50 6 10 80 6 2010 256 6 10 50 506 10 80 6 2024 25 6 06 10 75 50 6
40、10 80 6 2038 25 6 546 15 100 50 6 10 80 6 2543 25 6 6 15 110 50 6 10 80 6 25100 50 6 15 150 6 30 200 100 6 25 250 6 50150 506 15 275 6 30 300 100 6 25 450 6 50200 50 6 15 400 6 30 400 100 6 25 650 6 50250 506 15 525 6 30 500 1006 25 850 6 50300 50 6 15 650 6 30 600 100 6 25 1050 6 50350 50 6 15 775
41、6 30 700 100 6 25 1250 6 50400 100 6 30 800 6 60 800 200 6 50 1400 6 100500 100 6 30 900 6 60 1000 200 6 50 18006 100600 1006 30 1000 6 60 1200 2006 50 2200 6 100700 100 6 30 1300 6 60 1400 200 6 50 2600 6 100800 100 6 30 1500 6 60 1600 2006 50 3000 6 1001000 100 6 30 1700 6 60 1800 200 6 50 32006 1
42、001100 100 6 30 2100 6 60 2000 200 6 50 3600 6 100AThermal properties of insulation materials and systems such as thermal transference (Tt), conductance (C), and surface heat transfer coefficient (h0) are calculatedfrom test measurements of heat input, hot surface temperature, cold surface temperatu
43、re and ambient air temperature.BCelsius temperatures are standard. The values in degrees Fahrenheit are not intended to be exact conversions of those values in degrees Celsius.CAmbient temperatures other than shown may be required for applications other than normal building interior ambient temperat
44、ures. Thermal properties should bedetermined from test data using ambient temperatures suitable for the applications, but the change must be reported.DSelection of temperature difference for property evaluations should reflect the actual temperature differences of the intended applications.C 1058 03 (2008)3
