Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation

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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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Status
Historical
Publication Date
09-Apr-2003
Technical Committee
Drafting Committee
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Designation:C1058–03
Standard Practice for
Selecting Temperatures for Evaluating and Reporting
1
Thermal Properties of Thermal Insulation
This standard is issued under the fixed designation C 1058; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope C 201 Test Method for Thermal Conductivity of Refracto-
3
ries
1.1 This practice covers standard mean temperatures for
C 335 Test Method for Steady-State Heat Transfer Proper-
reporting thermal properties of thermal insulations, products,
2
ties of Horizontal Pipe Insulation
and materials, and of related systems and components, both
C 518 Test Method for Steady-State Heat Flux Measure-
insulated and uninsulated.
ments and Thermal Transmission Properties by Means of
1.2 Thermal properties shall be determined as a function of
2
the Heat Flow Meter Apparatus
temperature by standard test methods. (Test Methods C 177,
C 653 Guide for Determination of the Thermal Resistance
C 201, C 236, C 335, C 518, C 745, C 976, C 1114, Guide
2
of Low-Density Blanket-Type Mineral Fiber Insulation
C 653, and Practice C 687, all in combination with Practice
C 687 Practice for Determination of theThermal Resistance
C 1045.)
2
of Loose-Fill Building Insulation
NOTE 1—Standard referenced materials are needed to span the tem-
C 745 Test Method for Heat Flux Through Evacuated Insu-
perature range of the tests.
2
lations Using a Guarded Flat Plate Boiloff Calorimeter
1.3 Thispracticerecommendsstandardconditionsforusein
C 1045 Practice for Calculating Thermal Transmission
2
testing and evaluating thermal properties as a function of
Properties from Steady-State Heat Flux Measurements
temperature by standard test methods.
C 1114 Test Method for Steady State Thermal Transmission
2
1.4 General applications of thermal insulations include:
Properties by Means of the Thin-Heater Apparatus
1.4.1 Building envelopes,
C 1363 Test Method for Thermal Performance of Building
2
1.4.2 Mechanical systems or processes, and
Assemblies by Means of a Hot Box Apparatus
1.4.3 Building and industrial insulations.
3. Terminology
1.5 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
3.1 Definitions— For definitions of terms and symbols used
only.Approximate inch-pound units are provided in the tables.
in this practice, refer to Terminology C 168.
1.6 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 The various methods for measuring and calculating
priate safety and health practices and determine the applica- thermal properties provide data and information for manufac-
bility of regulatory limitations prior to use.
turer’s published information, for comparison of related prod-
ucts, and for designers and users to evaluate insulation prod-
2. Referenced Documents
ucts for particular applications. For these purposes it is
2.1 ASTM Standards:
advisable to provide basic data and information produced
2
C 168 Terminology Relating to Thermal Insulation
under standard temperature conditions.
C 177 Test Method for Steady-State Heat Flux Measure-
4.2 Thermal properties of a specimen may change with
ments and Thermal Transmission Properties by Means of
mean temperature, with temperature difference across the
2
the Guarded-Hot-Plate Apparatus
specimens, and with high temperature exposure. Data and
information at standard temperatures are necessary for valid
comparison of thermal properties.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
4.3 The mean test temperatures to measure thermal proper-
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
ties shall be selected from those listed in Table 1. It is
Measurements.
Current edition approved April 10, 2003. Published May 2003. Originally
approved in 1986. Last previous edition approved 1997 as C 1058 – 97.
2 3
Annual Book of ASTM Standards, Vol 04.06. Annual Book of ASTM Standards, Vol 15.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1058–03
TABLE 1 Mean Test Temperatures for Reporting and Evaluation
4.3.2 Standard conditions are presented where the tempera-
of Thermal Properties of Thermal Insulations
tures of the two surfaces are fixed and surface coefficients are
Mean Test Temperature
not considered (Table 3).
Insulation Classification
A
°C °F
4.3.3 For conditio
...

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