ASTM C1303-08e1
(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
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.
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 2—Please see Appendix X3 for a discussion of the theory of accelerated aging via thin slicing.
Note 3—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.
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.
Specifications C 578, C 591, C 1029, C 1126 and C 1289 on rigid closed-cell foams ...
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) .
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 1—See Note 7 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 SI units are to be regarded as the standard. The inch-p...
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´1
Designation: C1303 – 08
Standard Test Method for
Predicting Long-Term Thermal Resistance of Closed-Cell
1
Foam Insulation
This standard is issued under the fixed designation C1303; 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
´ NOTE—Table A1.3 was editorially corrected in February 2009.
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
1.6 The values stated in SI units are to be regarded as the
faced rigid gas-filled closed-cell foam insulations by reducing
standard. The inch-pound values given in parentheses are for
the specimen thickness to accelerate aging under controlled
2 information only.
laboratory conditions (1-5) .
1.7 This standard does not purport to address all of the
1.2 Rigid gas-filled closed-cell foam insulation includes all
safety concerns, if any, associated with its use. It is the
cellular plastic insulations manufactured with the intent to
responsibility of the user of this standard to establish appro-
retain a blowing agent other than air.
priate safety and health practices and determine the applica-
1.3 This test method is limited to unfaced or permeably
bility of regulatory limitations prior to use.
faced, homogeneous materials. This method is applied to a
1.8 Table of Contents:
widerangeofrigidclosed-cellfoaminsulationtypes,including
Section
but not limited to: extruded polystyrene, polyurethane, poly-
Scope 1
isocyanurate, and phenolic. This test method does not apply to
Reference Documents 2
impermeably faced rigid closed-cell foams or to rigid closed- Terminology 3
Summary of Test Method 4
cell bun stock foams.
Significance and Use 5
Part A: The Prescriptive Method 6
NOTE 1—See Note 7 for more details regarding the applicability of this
Applicability 6.1
test method to rigid closed-cell bun stock foams.
Qualification Requirements 6.1.1
1.4 This test method utilizes referenced standard test proce- Facing Permeability 6.1.2
Apparatus 6.2
duresformeasuringthermalresistance.Periodicmeasurements
Sampling 6.3
are performed on specimens to observe the effects of aging.
Schedule 6.3.1
Representative Replicate Product Sheets 6.3.2
Specimens of reduced thickness (that is, thin slices) are used to
Replicate Test Specimen Sets 6.3.3
shorten the time required for these observations. The results of
Specimen Preparation 6.4
these measurements are used to predict the long-term thermal
Goal 6.4.1
Schedule 6.4.2
resistance of the material.
Specimen Extraction 6.4.3
1.5 The test method is given in two parts. The Prescriptive
Slice Flatness 6.4.4
Method in PartAprovides long-term thermal resistance values
Slice Thickness 6.4.5
Stack Composition 6.4.6
on a consistent basis that can be used for a variety of purposes,
Storage Conditioning 6.5
including product evaluation, specifications, or product com-
Test Procedure 6.6
parisons. The Research Method in part B provides a general
Thermal Resistance Measurement Schedule 6.6.1
Thermal Resistance Measurements 6.6.2
relationship between thermal conductivity, age, and product
Product Density 6.6.3
thickness.
Calculations 6.7
Part B: The Research Method 7
Background 7.1
1
TDSLApparatus 7.2
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal Sampling Schedule 7.3
Measurement. Specimen Preparation 7.4
Storage Conditioning 7.5
Current edition approved Sept. 15, 2008. Published October 2008. Originally
Test Procedure 7.6
approved in 1995. Last previous edition approved in 2007 as C1303 – 07. DOI:
Calculations 7.7
10.1520/C1303-08E01.
2
Reporting 8
The boldface numbers in parentheses refer to the list of references at the end of
Reporting for Part A, the Prescriptive Method 8.1
this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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C1303 – 08
6
of Closed-Cell Foam Insulation
Reporting for Part B, the Research Method 8.2
Precision and Bias 9
Keywords 10 3. Terminology
Mandatory Information – Qualification Annex
3.1 Definitions—For definitions of terms and symbols used
A1
Specimen Preparation A1.1 in this test method, refer to Terminology C168.
Homogeneity Qualification A1.2
3.2 Definitions of Terms Specific to This Standard:
Aging Equivalence Test Procedure A1.3
3.2.1 aging, v—the change in thermophysical properties of
...
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.
´1
Designation:C 1303–08 Designation: C1303 – 08
Standard Test Method for
Predicting Long-Term Thermal Resistance of Closed-Cell
1
Foam Insulation
This standard is issued under the fixed designation C1303; 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
´ NOTE—Table A1.3 was editorially corrected in February 2009.
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) .
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 1—See Note 7 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 SI units are to be regarded as the standard. The inch-pound values given in parentheses are for
information only.
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 and health 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
Representative Replicate Product Sheets 6.3.2
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 Sept. 15, 2008. Published October 2008. Originally approved in 1995. Last previous edition approved in 2007 as C1303 – 07. DOI:
10.1520/C1303-08E01.
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 ----------------------
´1
C1303 – 08
Replicate Test Specimen Sets 6.3.3
Specimen Preparation 6.4
Goal 6.4.1
Schedule 6.4.2
Specimen Extraction 6.4.3
Slice Flatness 6.4.4
Slice Thickness 6.4.5
Stack Composition 6.4.6
Storage Conditioning 6.5
Test Procedure 6.6
Thermal Resistance Measurement 6.6.1
Schedule
Thermal Resistance Measurements 6.6.2
Product Density 6.6.3
Calculations 6.7
Part B: The Research Method 7
Background 7.1
TDSLApparatus 7.2
Sampling Schedule 7.3
Specimen Preparation 7.4
Storage Conditioning 7.5
Test Procedure 7.6
Calculations 7.7
Reporting 8
Reporting for Part A, the Prescriptive 8.1
Method
Reporting for Part B, the Research Method 8.2
Precision and Bias 9
Keywords 10
Mandatory Information – Qualification Annex
A1
Specimen Preparation A1.1
Homogeneity Qu
...
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