1、Designation: C 1058 03Standard 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 or, in the case o
2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers standard mean temperatures forreporting thermal properties of thermal in
3、sulations, 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, and Practice C 68
4、7, 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 methods.1.4 General
5、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. Approximate inch-poun
6、d 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 regulatory limit
7、ations prior to use.2. Referenced Documents2.1 ASTM Standards:C 168 Terminology Relating to Thermal Insulation2C 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate Apparatus2C 201 Test Method for Thermal Conductivity of Refra
8、cto-ries3C 335 Test Method for Steady-State Heat Transfer Proper-ties of Horizontal Pipe Insulation2C 518 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Heat Flow Meter Apparatus2C 653 Guide for Determination of the Thermal Resistanceof Low-De
9、nsity Blanket-Type Mineral Fiber Insulation2C 687 Practice for Determination of the Thermal Resistanceof Loose-Fill Building Insulation2C 745 Test Method for Heat Flux Through Evacuated Insu-lations Using a Guarded Flat Plate Boiloff Calorimeter2C 1045 Practice for Calculating Thermal TransmissionPr
10、operties from Steady-State Heat Flux Measurements2C 1114 Test Method for Steady State Thermal TransmissionProperties by Means of the Thin-Heater Apparatus2C 1363 Test Method for Thermal Performance of BuildingAssemblies by Means of a Hot Box Apparatus23. Terminology3.1 Definitions For definitions of
11、 terms and symbols usedin 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 t
12、o evaluate insulation prod-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, an
13、d with high temperature exposure. 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. It is1This practice is under the jurisdiction of ASTM C
14、ommittee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.30 on ThermalMeasurements.Current edition approved April 10, 2003. Published May 2003. Originallyapproved in 1986. Last previous edition approved 1997 as C 1058 97.2Annual Book of ASTM Standards, Vol 04.06.3Annual
15、 Book of ASTM Standards, Vol 15.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.recommended that thermal properties of insulation materials beevaluated over a mean temperature range that represents theintended end use. For this si
16、tuation, the lowest and greatestmean temperatures should be within 10C of the maximum andminimum mean temperature of interest. The temperature dif-ferences for any chosen mean temperature will depend uponboth the thermal insulation application (see appropriate mate-rials specification), the method o
17、f evaluation, and the limita-tions of the apparatus. Temperature differences or relevanttemperatue conditions required by ASTM material specifica-tions shall take precedence over those recommended in thispractice.4.3.1 Standard conditions are presented where both surfacesare exposed to fixed ambient
18、 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 fixed and surface coefficients arenot considered (Table 3).4.3.3 For conditions where the temperature of o
19、nly 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 such as thermal conductivity versus meantemperature for thermal insulating materials. Thermal insula-tions exh
20、ibiting 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) between mean temperatures. The test temperaturedifferences used depend on the vapor pressure versus tempera-ture
21、 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 are of this type.5. Procedure5.1 Since there are distinctly different needs or uses forthermal performance
22、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 tables.5.2.1 If the tables do not contain the appropriate temperatureconditions, specifically report excepti
23、ons.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. Normally, Test Method C 1363 is used forevaluation of b
24、uilding 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 Building andIndustrial InsulationsEvaluations o
25、f 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 surface temperaturewith the other exposed to a fi
26、xed ambient temperature using theTABLE 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 Insulat
27、ions: Use 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
28、 degrees 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 54
29、6 55 6 9256 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
30、given in 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 t
31、emperatures suitable for the applications, but the change must be reported.C1058032mean temperatures of Table 1 and Test Method C335. Formechanical systems and processes for applications from -100to 150C (nominally -200 to 300F), recommended meantemperatures are those in 5.3.1 plus 100 and -50C (200
32、 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, 600, and1000F).6. Keywords6.1 building envelope; industrial application; mean testtemperature; mechanical process; selecting temperatures
33、; ther-mal insulation; thermal propertyASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the
34、riskof infringement of such rights, are entirely their own responsibility.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
35、this standard or for additional standardsand should be addressed 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 shouldma
36、ke 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 Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained
37、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 3 Standard Temperatures for Thermal Transmission Property Testing and Evaluation Both Surface Temperatures FixedANOTE 1Typical for use w
38、ith Test Methods C 177, C 201, C 518, and C 1114.Temperature, CBTemperature, FBMeanTemperature DifferenceCDMeanTemperature DifferenceCDSmall Large Small Large200 256 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
39、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 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
40、 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 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 6
41、0 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 1001100 100 6 30 2100 6 60 2000 200 6 50 3600 6 100AThermal properties of insulation materials and systems such as thermal transference (T
42、t), conductance (C), and surface heat transfer coefficient (h0) are calculatedfrom test measurements of heat input, hot surface temperature, cold surface temperature and ambient air temperature.BCelsius temperatures are standard. The values in degrees Fahrenheit are not intended to be exact conversi
43、ons 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 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.C1058033
