1、Designation: C1058/C1058M 10 (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 origi
2、nal 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 the
3、rmal 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 C
4、653,and Practice C687, all in combination with Practice C1045.)NOTE 1Standard 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
5、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 s
6、tandard 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 th
7、eresponsibility 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
8、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
9、 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 Usin
10、g 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
11、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 responsibili
12、ty 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, orconta
13、ct 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, P
14、O Box C700, West Conshohocken, PA 19428-2959. United States14. 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
15、 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 spec
16、imens, 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.Itisrecommended that thermal properties of insu
17、lation 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 temperaturedifferences for any chosen mean temperature will d
18、epend uponboth the thermal insulation application (see appropriate mate-rials specification), the method of evaluation, and the limita-tions of the apparatus. Temperature differences or relevanttemperature conditions required by ASTM material specifica-tions shall take precedence over those recommen
19、ded 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 the two surfaces are
20、 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 accuratelythermal properties suc
21、h 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 coldsides and (2) betwe
22、en 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 plastic insulations
23、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 conditions from the t
24、ables.NOTE 3These mean temperatures result from test temperatures for thehot and cold surfaces. Report the hot and cold surface temperatures thatare used in Practice C1045 to analyze non linear temperature dependen-cies for the thermal performance.5.2.1 If the tables do not contain the appropriate t
25、emperatureconditions, specifically report exceptions.5.3 Thermal insulation classifications are:5.3.1 Building EnvelopesTypically, building assembliesor constructions, both insulated and uninsulated, are tested withboth surfaces exposed to fixed ambient temperatures as pre-scribed in Table 2. Normal
26、ly, Test Method C1363 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 temperatures are 4, 24, and 43C 40, 75 and 110F.5.3.2 Mechanical Processes or Systems and B
27、uilding andIndustrial InsulationsEvaluations of thermal performanceare generally limited to a single material where data is neededfor codes, specifications, and technical literature. Evaluationsinvolve either (1) fixing both surface temperatures as pre-scribed in Tables 2 and 3 or (2) fixing one sur
28、face temperaturewith the other exposed to a fixed ambient temperature using themean temperatures of Table 1 and Test Method C335/C335M.For mechanical systems and processes for applications from-100 to 150C nominally -200 to 300F, recommended meantemperatures are those in 5.3.1 plus 100 and -50C 200
29、andTABLE 1 Mean Test Temperatures for Reporting and Evaluationof Thermal Properties of Thermal InsulationsInsulation ClassificationMean Test TemperatureC FABuilding Envelopes 4 254 4010 5024 7538 10043 110Mechanical Systems or Processes and Buildingand Industrial Insulations: Use those listed in thi
30、stable 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 be exactconversions of those values in degrees Celsius.C1058/C1058M
31、 10 (2015)2-50F. 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, 600, and1000F.6. Keywords6.1 building envelope; industrial application; mean testtemperature; mechanical process; selecting temperatur
32、es; ther-mal insulation; thermal propertyTABLE 2 Standard Temperatures for Thermal Transmittance Evaluations With Both Specimen Surfaces Exposed to FixedAmbient TemperaturesATemperature, CBTemperature, FBMean Hot AmbientCCold AmbientCMean Hot AmbientCCold AmbientC4 24 5 32 5 25 75 9 25 94 24 5 15 5
33、40 75 9 5 910 245 45 50 759 25924 385 105 75 1009 50938 52 5 24 5 100 125 9 75 943 635 245 110 1459 759AThermal transmission properties of panels of various building constructions are thermal transmittance (U), and thermal conductance (C).BCelsius temperatures are standard. The values in degrees Fah
34、renheit given in this table are not intended to be exact conversions of those values given in degreesCelsius.CIt is possible that ambient temperatures other than shown will be required for applications other than normal building interior ambient temperatures. It is acceptable todetermine thermal pro
35、perties from test data using ambient temperatures suitable for the applications, but the change must be reported.TABLE 3 Standard Temperatures for Thermal Transmission Property Testing and Evaluation Both Surface Temperatures FixedANOTE 1Typical for use with Test Methods C177, C201, C518, and C1114.
36、Temperature, CBTemperature, FBMeanTemperature DifferenceCDMeanTemperature DifferenceCDSmall Large Small Large200 25 5 100 20 300 50 10 200 30100 25 5 200 20 200 50 10 300 3075 25 5 150 20 100 50 10 300 3050 25 5 150 20 50 50 10 300 2025 25 5 100 10 0 50 10 300 204 25 5 50 10 25 50 10 100 204 25 5 40
37、 10 40 50 10 80 2010 25 5 40 10 50 50 10 80 2024 25 5 40 10 75 50 10 80 2038 25 5 40 15 100 50 10 80 2543 25 5 40 15 110 50 10 80 25100 50 15 150 30 200 100 25 250 50150 50 15 275 30 300 100 25 450 50200 50 15 400 30 400 100 25 650 50250 50 15 525 30 500 100 25 850 50300 50 15 650 30 600 100 25 1050
38、 50350 50 15 775 30 700 100 25 1250 50400 100 30 800 60 800 200 50 1400 100500 100 30 900 60 1000 200 50 1800 100600 100 30 1000 60 1200 200 50 2200 100700 100 30 1300 60 1400 200 50 2600 100800 100 30 1500 60 1600 200 50 3000 1001000 100 30 1700 60 1800 200 50 3200 1001100 100 30 2100 60 2000 200 5
39、0 3600 100AThermal properties of insulation materials and systems such as thermal transference (Tt), conductance (C), and surface heat transfer coefficient (h0) are calculated fromtest measurements of heat input, hot surface temperature, cold surface temperature and ambient air temperature.BCelsius
40、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 temperatures. Thermal properties should bedeterm
41、ined from test data using ambient temperatures suitable for the applications, but the change must be reported.DSelection of temperature difference for property evaluations needs to reflect the actual temperature differences of the intended applications.C1058/C1058M 10 (2015)3ASTM International takes
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43、onsibility.This standard is subject to revision at any time by the responsible technical committee and 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 addresse
44、d to ASTM International Headquarters. Your comments will receive careful consideration at a meeting 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
45、address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 10 (2015)4
