ASTM C1303/C1303M-22
(Test Method)Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
SIGNIFICANCE AND USE
5.1 Rigid gas-filled closed-cell foam insulations include all cellular plastic insulations which rely on a blowing agent (or gas), other than air, for thermal resistance values. At the time of manufacture, the cells of the foam usually contain their highest percentage of blowing agent and the lowest percentage of atmospheric gases. As time passes, the relative concentrations of these gases change due primarily to diffusion. This results in a general reduction of the thermal resistance of the foam due to an increase in the thermal conductivity of the resultant cell gas mixture. These phenomena are typically referred to as foam aging.
5.1.1 For some rigid gas-filled closed-cell foam insulation products produced using blowing agent gases that diffuse very rapidly out of the full-thickness foam product, such as expanded polystyrene, there is no need to accelerate the aging process.
5.1.2 Physical gas diffusion phenomena occur in three dimensions. The one-dimensional form of the diffusion equations used in the development of this practice are valid only for planar geometries, that is, for specimens that have parallel faces and where the thickness is much smaller than the width and much smaller than the length.
Note 3: Please see Appendix X3 for a discussion of the theory of accelerated aging via thin slicing.
Note 4: Theoretical and experimental evaluations of the aging of insulation in radial forms, such as pipe insulation, have been made. (6) However, these practices have not evolved to the point of inclusion in the test standard.
5.2 The change in thermal resistance due to the phenomena described in 5.1 usually occurs over an extended period of time. Information regarding changes in the thermal resistance of these materials as a function of time is required in a shorter period of time so that decisions regarding formulations, production, and comparisons with other materials can be made.
5.3 Specifications C578, C591, C1029, C1126 and C1289 on rigid cl...
SCOPE
1.1 This test method covers a procedure for predicting the long-term thermal resistance (LTTR) of unfaced or permeably faced rigid gas-filled closed-cell foam insulations by reducing the specimen thickness to accelerate aging under controlled laboratory conditions (1-5) .2
Note 1: See Terminology, 3.2.1, for the meaning of the word aging within this standard.
1.2 Rigid gas-filled closed-cell foam insulation includes all cellular plastic insulations manufactured with the intent to retain a blowing agent other than air.
1.3 This test method is limited to unfaced or permeably faced, homogeneous materials. This method is applied to a wide range of rigid closed-cell foam insulation types, including but not limited to: extruded polystyrene, polyurethane, polyisocyanurate, and phenolic. This test method does not apply to impermeably faced rigid closed-cell foams or to rigid closed-cell bun stock foams.
Note 2: See Note 8 for more details regarding the applicability of this test method to rigid closed-cell bun stock foams.
1.4 This test method utilizes referenced standard test procedures for measuring thermal resistance. Periodic measurements are performed on specimens to observe the effects of aging. Specimens of reduced thickness (that is, thin slices) are used to shorten the time required for these observations. The results of these measurements are used to predict the long-term thermal resistance of the material.
1.5 The test method is given in two parts. The Prescriptive Method in Part A provides long-term thermal resistance values on a consistent basis that can be used for a variety of purposes, including product evaluation, specifications, or product comparisons. The Research Method in part B provides a general relationship between thermal conductivity, age, and product thickness.
1.5.1 To use the Prescriptive Method, the date of manufacture must be known, which usually involves the cooperation of the m...
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1303/C1303M − 22
Standard Test Method for
Predicting Long-Term Thermal Resistance of Closed-Cell
1
Foam Insulation
This standard is issued under the fixed designation C1303/C1303M; 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 1.5.1 To use the Prescriptive Method, the date of manufac-
ture must be known, which usually involves the cooperation of
1.1 This test method covers a procedure for predicting the
the manufacturer.
long-term thermal resistance (LTTR) of unfaced or permeably
faced rigid gas-filled closed-cell foam insulations by reducing
1.6 The values stated in either SI units or inch-pound units
the specimen thickness to accelerate aging under controlled
are to be regarded separately as standard. The values stated in
2
laboratory conditions (1-5).
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be
NOTE 1—See Terminology, 3.2.1, for the meaning of the word aging
used independently of the other, and values from the two
within this standard.
systems shall not be combined.
1.2 Rigid gas-filled closed-cell foam insulation includes all
cellular plastic insulations manufactured with the intent to
1.7 This standard does not purport to address all of the
retain a blowing agent other than air.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
1.3 This test method is limited to unfaced or permeably
priate safety, health, and environmental practices and deter-
faced, homogeneous materials. This method is applied to a
mine the applicability of regulatory limitations prior to use.
widerangeofrigidclosed-cellfoaminsulationtypes,including
but not limited to: extruded polystyrene, polyurethane, 1.8 Table of Contents:
polyisocyanurate, and phenolic. This test method does not
Section
Scope 1
apply to impermeably faced rigid closed-cell foams or to rigid
Reference Documents 2
closed-cell bun stock foams.
Terminology 3
NOTE 2—See Note 8 for more details regarding the applicability of this
Summary of Test Method 4
test method to rigid closed-cell bun stock foams.
Significance and Use 5
Part A: The Prescriptive Method 6
1.4 This test method utilizes referenced standard test proce-
Applicability 6.1
duresformeasuringthermalresistance.Periodicmeasurements
Qualification Requirements 6.1.1
Facing Permeability 6.1.2
are performed on specimens to observe the effects of aging.
Apparatus 6.2
Specimens of reduced thickness (that is, thin slices) are used to
Sampling 6.3
shorten the time required for these observations. The results of
Schedule 6.3.1
Specimen Preparation 6.4
these measurements are used to predict the long-term thermal
Goal 6.4.1
resistance of the material.
Schedule 6.4.2
Replicate Test Specimen Sets 6.4.3
1.5 The test method is given in two parts. The Prescriptive
Specimen Extraction 6.4.4
Method in PartAprovides long-term thermal resistance values
Slice Flatness 6.4.5
on a consistent basis that can be used for a variety of purposes, Slice Thickness 6.4.6
Stack Composition 6.4.7
including product evaluation, specifications, or product com-
Storage Conditioning 6.5
parisons. The Research Method in part B provides a general
Test Procedure 6.6
relationship between thermal conductivity, age, and product Thermal Resistance Measurement Schedule 6.6.1
Thermal Resistance Measurements 6.6.2
thickness.
Product Density 6.6.3
Calculations 6.7
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal Part B: The Research Method 7
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal Background 7.1
TDSLApparatus 7.2
Measurement.
Sampling Schedule 7.3
CurrenteditionapprovedJune1,2022.PublishedJuly2022.Originallyapproved
Specimen Preparation 7.4
in 1995. Last previous edition approved in 2019 as C1303/C1303M – 19. DOI:
Storage Conditioning 7.5
10.1520/C1303_C1303M-22.
2 Test Procedure 7.6
The boldface numbers in parentheses refer to the list of references at the end of
Calculations 7.7
this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1303/C1303M − 22
2.3 ASTM Adjuncts:
Reporting 8
Reporting for Part A, the Prescriptive Method 8.1
Test Method for Predicting Long-Term Thermal Resistance
Reporting for Part B, the Research Method 8.2
5
of
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: C1303/C1303M − 19 C1303/C1303M − 22
Standard Test Method for
Predicting Long-Term Thermal Resistance of Closed-Cell
1
Foam Insulation
This standard is issued under the fixed designation C1303/C1303M; 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
1.1 This test method covers a procedure for predicting the long-term thermal resistance (LTTR) of unfaced or permeably faced
rigid gas-filled closed-cell foam insulations by reducing the specimen thickness to accelerate aging under controlled laboratory
2
conditions (1-5).
NOTE 1—See Terminology, 3.2.1, for the meaning of the word aging within this standard.
1.2 Rigid gas-filled closed-cell foam insulation includes all cellular plastic insulations manufactured with the intent to retain a
blowing agent other than air.
1.3 This test method is limited to unfaced or permeably faced, homogeneous materials. This method is applied to a wide range
of rigid closed-cell foam insulation types, including but not limited to: extruded polystyrene, polyurethane, polyisocyanurate, and
phenolic. This test method does not apply to impermeably faced rigid closed-cell foams or to rigid closed-cell bun stock foams.
NOTE 2—See Note 8 for more details regarding the applicability of this test method to rigid closed-cell bun stock foams.
1.4 This test method utilizes referenced standard test procedures for measuring thermal resistance. Periodic measurements are
performed on specimens to observe the effects of aging. Specimens of reduced thickness (that is, thin slices) are used to shorten
the time required for these observations. The results of these measurements are used to predict the long-term thermal resistance
of the material.
1.5 The test method is given in two parts. The Prescriptive Method in Part A provides long-term thermal resistance values on a
consistent basis that can be used for a variety of purposes, including product evaluation, specifications, or product comparisons.
The Research Method in part B provides a general relationship between thermal conductivity, age, and product thickness.
1.5.1 To use the Prescriptive Method, the date of manufacture must be known, which usually involves the cooperation of the
manufacturer.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
1
This test method is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
Measurement.
Current edition approved March 1, 2019June 1, 2022. Published March 2019July 2022. Originally approved in 1995. Last previous edition approved in 20152019 as
C1303/C1303M – 15.C1303/C1303M – 19. DOI: 10.1520/C1303_C1303M-19.10.1520/C1303_C1303M-22.
2
The boldface numbers in parentheses refer to the list of references at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1303/C1303M − 22
1.7 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.8 Table of Contents:
Section
Scope 1
Reference Documents 2
Terminology 3
Summary of Test Method 4
Significance and Use 5
Part A: The Prescriptive Method 6
Applicability 6.1
Qualification Requirements 6.1.1
Facing Permeability 6.1.2
Apparatus 6.2
Sampling 6.3
Schedule 6.3.1
Specimen Preparation 6.4
Goal 6.4.1
Schedule 6.4.2
Replicate Test Specimen Sets 6.4.3
Specimen Extraction 6.4.4
Slice Flatness 6.4.5
Slice Thickness 6.4.6
Stack Composition 6.4.7
Storage Conditioning 6.5
Test Procedure 6.6
Thermal Resistance Measurement Schedule 6.6.1
Thermal Resistance Measurements 6.6.2
Product Density 6.6.3
Calculations 6.7
Part B: The Research Method 7
Background 7.1
TDSL Apparatus 7.2
Sampling Schedule 7.3
Specimen Preparation 7.4
Storage Co
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1303/C1303M − 22
Standard Test Method for
Predicting Long-Term Thermal Resistance of Closed-Cell
1
Foam Insulation
This standard is issued under the fixed designation C1303/C1303M; 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 1.5.1 To use the Prescriptive Method, the date of manufac-
ture must be known, which usually involves the cooperation of
1.1 This test method covers a procedure for predicting the
the manufacturer.
long-term thermal resistance (LTTR) of unfaced or permeably
faced rigid gas-filled closed-cell foam insulations by reducing
1.6 The values stated in either SI units or inch-pound units
the specimen thickness to accelerate aging under controlled
are to be regarded separately as standard. The values stated in
2
laboratory conditions (1-5).
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be
NOTE 1—See Terminology, 3.2.1, for the meaning of the word aging
within this standard. used independently of the other, and values from the two
systems shall not be combined.
1.2 Rigid gas-filled closed-cell foam insulation includes all
cellular plastic insulations manufactured with the intent to
1.7 This standard does not purport to address all of the
retain a blowing agent other than air.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
1.3 This test method is limited to unfaced or permeably
priate safety, health, and environmental practices and deter-
faced, homogeneous materials. This method is applied to a
mine the applicability of regulatory limitations prior to use.
wide range of rigid closed-cell foam insulation types, including
but not limited to: extruded polystyrene, polyurethane, 1.8 Table of Contents:
polyisocyanurate, and phenolic. This test method does not
Section
Scope 1
apply to impermeably faced rigid closed-cell foams or to rigid
Reference Documents 2
closed-cell bun stock foams.
Terminology 3
NOTE 2—See Note 8 for more details regarding the applicability of this
Summary of Test Method 4
test method to rigid closed-cell bun stock foams.
Significance and Use 5
Part A: The Prescriptive Method 6
1.4 This test method utilizes referenced standard test proce-
Applicability 6.1
dures for measuring thermal resistance. Periodic measurements
Qualification Requirements 6.1.1
Facing Permeability 6.1.2
are performed on specimens to observe the effects of aging.
Apparatus 6.2
Specimens of reduced thickness (that is, thin slices) are used to
Sampling 6.3
shorten the time required for these observations. The results of
Schedule 6.3.1
Specimen Preparation 6.4
these measurements are used to predict the long-term thermal
Goal 6.4.1
resistance of the material.
Schedule 6.4.2
Replicate Test Specimen Sets 6.4.3
1.5 The test method is given in two parts. The Prescriptive
Specimen Extraction 6.4.4
Method in Part A provides long-term thermal resistance values
Slice Flatness 6.4.5
on a consistent basis that can be used for a variety of purposes, Slice Thickness 6.4.6
Stack Composition 6.4.7
including product evaluation, specifications, or product com-
Storage Conditioning 6.5
parisons. The Research Method in part B provides a general
Test Procedure 6.6
relationship between thermal conductivity, age, and product Thermal Resistance Measurement Schedule 6.6.1
Thermal Resistance Measurements 6.6.2
thickness.
Product Density 6.6.3
Calculations 6.7
1
This test method is under the jurisdiction of ASTM Committee C16 on Thermal Part B: The Research Method 7
Background 7.1
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
TDSL Apparatus 7.2
Measurement.
Sampling Schedule 7.3
Current edition approved June 1, 2022. Published July 2022. Originally approved
Specimen Preparation 7.4
in 1995. Last previous edition approved in 2019 as C1303/C1303M – 19. DOI:
Storage Conditioning 7.5
10.1520/C1303_C1303M-22.
2 Test Procedure 7.6
The boldface numbers in parentheses refer to the list of references at the end of
Calculations 7.7
this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1303/C1303M − 22
2.3 ASTM Adjuncts:
Reporting 8
Reporting for Part A, the Prescriptive Method 8.1
Test Method for Predicting Long-Term Thermal Resistance
Reporting for Part B, the Research Method 8.2
5
of Closed-Cell Foam Insulation
Precision and Bias 9
Keywords 10
Mandatory Information – Qualification Annex 3. Ter
...
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