ASTM C1058-03(2008)
(Practice)Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
SIGNIFICANCE AND USE
The various methods for measuring and calculating thermal properties provide data and information for manufacturer's published information, for comparison of related products, and for designers and users to evaluate insulation products for particular applications. For these purposes it is advisable to provide basic data and information produced under standard temperature conditions.
Thermal properties of a specimen may change with mean temperature, with temperature difference across the specimens, and with high temperature exposure. Data and information at standard temperatures are necessary for valid comparison of thermal properties.
The mean test temperatures to measure thermal properties shall be selected from those listed in Table 1. It is recommended that thermal properties of insulation materials be evaluated over a mean temperature range that represents the intended end use. For this situation, the lowest and greatest mean temperatures should be within 10°C of the maximum and minimum mean temperature of interest. The temperature differences for any chosen mean temperature will depend upon both the thermal insulation application (see appropriate materials specification), the method of evaluation, and the limitations of the apparatus. Temperature differences or relevant temperatue conditions required by ASTM material specifications shall take precedence over those recommended in this practice.
Standard conditions are presented where both surfaces are exposed to fixed ambient temperatures that are typical for testing building constructions, both insulated and uninsulated (Table 2).
Standard conditions are presented where the temperatures of the two surfaces are fixed and surface coefficients are not considered (Table 3).
For conditions where the temperature of only one surface is fixed with the other exposed to fixed ambient temperature, use the mean temperatures of Table 1.
These conditions must be stated to describe accurately thermal properties su...
SCOPE
1.1 This practice covers standard mean temperatures for reporting thermal properties of thermal insulations, products, and materials, and of related systems and components, both insulated and uninsulated.
1.2 Thermal properties shall be determined as a function of temperature by standard test methods. (Test Methods C 177, C 201, C 236, C 335, C 518, C 745, C 976, C 1114, Guide C 653, and Practice C 687, all in combination with Practice C 1045.)
Note 1—Standard referenced materials are needed to span the temperature range of the tests.
1.3 This practice recommends standard conditions for use in testing and evaluating thermal properties as a function of temperature by standard test methods.
1.4 General applications of thermal insulations include:
1.4.1 Building envelopes,
1.4.2 Mechanical systems or processes, and
1.4.3 Building and industrial insulations.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Approximate inch-pound units are provided in the tables.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:C1058–03 (Reapproved 2008)
Standard Practice for
Selecting Temperatures for Evaluating and Reporting
Thermal Properties of Thermal Insulation
This standard is issued under the fixed designation C1058; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C201 Test Method for Thermal Conductivity of Refracto-
ries
1.1 This practice covers standard mean temperatures for
C335 Test Method for Steady-State Heat Transfer Proper-
reporting thermal properties of thermal insulations, products,
ties of Pipe Insulation
and materials, and of related systems and components, both
C518 Test Method for Steady-State Thermal Transmission
insulated and uninsulated.
Properties by Means of the Heat Flow Meter Apparatus
1.2 Thermal properties shall be determined as a function of
C653 GuideforDeterminationoftheThermalResistanceof
temperature by standard test methods. (Test Methods C177,
Low-Density Blanket-Type Mineral Fiber Insulation
C201, C236, C335, C518, C745, C976, C1114, Guide C653,
C687 Practice for Determination of Thermal Resistance of
and Practice C687, all in combination with Practice C1045.)
Loose-Fill Building Insulation
NOTE 1—Standard referenced materials are needed to span the tem-
C745 Test Method for Heat Flux Through Evacuated Insu-
perature range of the tests.
lations Using a Guarded Flat Plate Boiloff Calorimeter
1.3 Thispracticerecommendsstandardconditionsforusein
C1045 PracticeforCalculatingThermalTransmissionProp-
testing and evaluating thermal properties as a function of
erties Under Steady-State Conditions
temperature by standard test methods.
C1114 Test Method for Steady-State Thermal Transmission
1.4 General applications of thermal insulations include:
Properties by Means of the Thin-Heater Apparatus
1.4.1 Building envelopes,
C1363 Test Method for Thermal Performance of Building
1.4.2 Mechanical systems or processes, and
Materials and Envelope Assemblies by Means of a Hot
1.4.3 Building and industrial insulations.
Box Apparatus
1.5 The values stated in SI units are to be regarded as the
3. Terminology
standard. The values given in parentheses are for information
only.Approximate inch-pound units are provided in the tables.
3.1 Definitions— For definitions of terms and symbols used
1.6 This standard does not purport to address all of the
in this practice, refer to Terminology C168.
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.1 The various methods for measuring and calculating
bility of regulatory limitations prior to use. thermal properties provide data and information for manufac-
turer’s published information, for comparison of related prod-
2. Referenced Documents
ucts, and for designers and users to evaluate insulation prod-
2.1 ASTM Standards:
ucts for particular applications. For these purposes it is
C168 Terminology Relating to Thermal Insulation
advisable to provide basic data and information produced
C177 Test Method for Steady-State Heat Flux Measure-
under standard temperature conditions.
ments and Thermal Transmission Properties by Means of
4.2 Thermal properties of a specimen may change with
the Guarded-Hot-Plate Apparatus
mean temperature, with temperature difference across the
specimens, and with high temperature exposure. Data and
information at standard temperatures are necessary for valid
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
comparison of thermal properties.
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
4.3 The mean test temperatures to measure thermal proper-
Measurement.
Current edition approved Aug. 1, 2008. Published August 2008. Originally ties shall be selected from those listed in Table 1.Itis
approved in 1986. Last previous edition approved 2003 as C1058 – 03. DOI:
recommendedthatthermalpropertiesofinsulationmaterialsbe
10.1520/C1058-03R08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1058–03 (2008)
TABLE 1 Mean Test Temperatures for Reporting and Evaluation
4.3.3 For conditions where the temperature of only one
of Thermal Properties of Thermal Insulations
surface is fixed with the other exposed to fixed ambient
Mean Test Temperature
temperature, use the mean temperatures of Table 1.
Insulation Classification
A
°C °F
4.4 These conditions must be stated to describe accurately
Building Envelopes −4 25 thermal properties such as thermal conductivity versus mean
temperature for thermal insulating materials. Thermal insula-
10 50
tions exhibiting inflection points due to the change of state of
24 75
38 100 insulating gases (see Note 2), must be tested at sufficiently
43 110
small temperature differences between (1) the hot and cold
sides and (2) between mean temperatures.The test temperature
Mechanical Systems or Processes and Building −200 −300
and Industrial Insulations: Use those listed in this differences used depend on the vapor pressure versus tempera-
table above and the following:
turerelationshipofthegasesinvolvedandtheabilityofthetest
−100 −200
apparatus to provide accurate measurements of low tempera-
−75 −100
−50 −50 ture differences.
−25 0
100 200
NOTE 2—Certain closed-cell cellular plastic insulations are of this type.
150 300
200 400
5. Procedure
250 500
300 600
5.1 Since there are distinctly different needs or uses for
350 700
thermal performance information, the test conditions selected
400 800
500 1000 must be appropriate to the need or use.
600 1200
5.2 Determine the use classification described in 5.3 and
700 1400
choose the appropriate temperature conditions from the tables.
800 1600
1000 1800
5.2.1 Ifthetablesdonotcontaintheappropriatetemperature
1100 2000
conditions, specifically report exceptions.
A
The values in degrees Fahrenheit given in this table are not intended to be
5.3 Thermal insulation classifications are:
exact conversions of those values in degrees Celsius.
5.3.1 Building Envelopes—Typically, building assemblies
orconstructions,bothinsulatedanduninsulated,aretestedwith
evaluated over a
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C1058–97 Designation:C1058–03 (Reapproved 2008)
Standard Practice for
Selecting Temperatures for Evaluating and Reporting
Thermal Properties of Thermal Insulation
This standard is issued under the fixed designation C1058; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers standard mean temperatures for reporting thermal properties of thermal insulations, products, and
materials, and of related systems and components, both insulated and uninsulated.
1.2 Thermal properties mayshall be determined as a function of temperature by standard test methods. (Test Methods C177,
C201, C236, C335, C518, C745, C976, C1114, Guide C653, and Practice C687, all in combination with Practice C1045.)
NOTE 1—Standard referenced materials are needed to span the temperature range of the tests.
1.3 This practice recommends standard conditions for use in testing and evaluating thermal properties as a function of
temperature by standard test methods.
1.4 General applications of thermal insulations include:
1.4.1 Building envelopes,
1.4.2 Mechanical systems or processes, and
1.4.3 Building and industrial insulations.
1.5The mean test temperatures to measure thermal properties shall be selected from those listed in Table 1. It is recommended
that thermal properties of insulation materials be evaluated over a mean temperature range that represents the intended end use.
For this situation, the lowest and greatest mean temperatures should be within 10°C of the maximum and minimum mean
temperatureofinterest.Thetemperaturedifferencesforanychosenmeantemperaturewilldependuponboththethermalinsulation
application (see appropriate materials specification), the method of evaluation, and the limitations of the apparatus. Temperature
differences or relevant temperatue conditions required by ASTM material specifications shall take precedence over those
recommended in this practice.
1.5.1Standardconditionsarepresentedwherebothsurfacesareexposedtofixedambienttemperaturesthataretypicalfortesting
building constructions, both insulated and uninsulated (Table 2).
1.5.2Standard conditions are presented where the temperatures of the two surfaces are fixed and surface coefficients are not
considered (Table 2 or Table 3).
1.5.3For conditions where the temperature of only one surface is fixed with the other exposed to fixed ambient temperature, use
the mean temperatures of Table 1.
1.6The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Approximate inch-pound units are provided in the tables.
1.7
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Approximate inch-pound units are provided in the tables.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C168Terminology Relating to Thermal Insulating Mate- rials Terminology Relating to Thermal Insulation
This practice is under the jurisdiction of ASTM Committee C-16C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
Measurements.
Current edition approved May 10, 1997.Aug. 1, 2008. Published August 1997.2008. Originally published as C1058–86.approved in 1986. Last previous edition
C1058–92.approved 2003 as C1058–03.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 04.06.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1058–03 (2008)
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
C201 Test Method for Thermal Conductivity of Refractories C236Test Method for Steady-State Thermal Performance of
Building Assemblies by Means of a Guarded Hot Box
C335 Test Method for Steady-State Heat Transfer Properties of Horizontal Pipe Insulation
C518 TestMethodforSteady-StateHeatFluxMeasurementsandThermalTransmissionPropertiesbyMeansoftheHeatFlow
Meter Apparatus
C653 Guide for Determination of the Thermal Resistance of Low-Density Blanket-Type Mineral Fiber Insulation
C687 Practice for Determination of the Thermal Resistance of Loose-Fill Building Insulation
C745Test Method for Heat Flux Through Evacuated Insulations Using a Guarded Flat Plate Boiloff Calorimeter
C976Test Method forThermal Performance of BuildingAssemblies by Means of a Calibrated Hot Box Test Method for Heat
Flux Through Evacuated Insulations Using a Guarded Flat Plate Boiloff Calorimeter
C1045Practice for Calculating Thermal Transmission Properties from Steady-State Heat Flux Measurements Practice for
Calculating Thermal Transmission Properties Under Steady-State Conditions
C1114Test Method for Steady State Thermal Transmission Properties by Means of the Thin-HeaterApparatus Test Method
for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus
C1363 Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box
Apparatus
3. Terminology
3.1 Definitions— For definitions of terms and symbols used in this practice, refer to Terminology C168.
4. Significance and Use
4.1 The various methods for measuring and calculating thermal properties provide data and information for manufacturer’s
publishedinformation,forcomparisonofrelatedproducts,andfordesignersanduserstoevaluateinsulationproductsforparticular
applications. For these purposes it is advisable to provide basic data and information produced under standard temperature
conditions.
4.2 Thermal properties of a specimen may change with mean temperature, with temperature difference across the specimens,
and with high temperature exposure. Data and information at standard temperatures are necessary for valid comparison of thermal
properties.
4.3These conditions must be stated to describe accurately thermal properties such as thermal conductivity versus mean
temperature for thermal insulating materials. Thermal insulations exhibiting inflection points due to the change of state of
insulating gases (see
4.3 The mean test temperatures to measure thermal properties shall be selected from those listed inTable 1. It is recommended
that thermal properties of insulation materials be evaluated over a mean temperature range that represents the intended end use.
For this situation, the lowest and greatest mean temperatures should be within 10°C of the maximum and minimum mean
temperatureofinterest.Thetemperaturedifferencesforanychosenmeantemperaturewilldependuponboththethermalinsulation
application (see appropriate materials specification), the method of evaluation, and the limitations of the apparatus. Temperature
differences or relevant temperatue conditions required by ASTM material specifications shall take precedence over those
recommended in this practice.
4.3.1 Standard conditions are presented where both surfaces are exposed to fixed ambient temperatures that are typical for
testing building constructions, both insulated and uninsulated (Table 2).
4.3.2 Standard conditions are presented where the temperatures of the two surfaces are fixed and surface coefficients are not
consi
...
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