ASTM C1303/C1303M-11a
(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 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.
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 C578, C591, C1029, C1126 and C1289 on rigid closed-cell foams measu...
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) .
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 manufa...
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Designation: C1303/C1303M – 11a
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
1.6 The values stated in either SI units or inch-pound units
faced rigid gas-filled closed-cell foam insulations by reducing
are to be regarded separately as standard. The values stated in
the specimen thickness to accelerate aging under controlled
2
each system may not be exact equivalents; therefore, each
laboratory conditions (1-5) .
system shall be used independently of the other. Combining
NOTE 1—See Terminology, 3.2.1, for the meaning of the word aging
values from the two systems may result in non-conformance
within this standard.
with the standard.
1.2 Rigid gas-filled closed-cell foam insulation includes all
1.7 This standard does not purport to address all of the
cellular plastic insulations manufactured with the intent to
safety concerns, if any, associated with its use. It is the
retain a blowing agent other than air.
responsibility of the user of this standard to establish appro-
1.3 This test method is limited to unfaced or permeably
priate safety and health practices and determine the applica-
faced, homogeneous materials. This method is applied to a
bility of regulatory limitations prior to use.
widerangeofrigidclosed-cellfoaminsulationtypes,including
1.8 Table of Contents:
but not limited to: extruded polystyrene, polyurethane, polyi-
Section
socyanurate, and phenolic. This test method does not apply to Scope 1
Reference Documents 2
impermeably faced rigid closed-cell foams or to rigid closed-
Terminology 3
cell bun stock foams.
Summary of Test Method 4
Significance and Use 5
NOTE 2—See Note 8 for more details regarding the applicability of this
Part A: The Prescriptive Method 6
test method to rigid closed-cell bun stock foams.
Applicability 6.1
Qualification Requirements 6.1.1
1.4 This test method utilizes referenced standard test proce-
Facing Permeability 6.1.2
duresformeasuringthermalresistance.Periodicmeasurements
Apparatus 6.2
Sampling 6.3
are performed on specimens to observe the effects of aging.
Schedule 6.3.1
Specimens of reduced thickness (that is, thin slices) are used to
Representative Replicate Product Sheets 6.3.2
shorten the time required for these observations. The results of Replicate Test Specimen Sets 6.3.3
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
1.5 The test method is given in two parts. The Prescriptive Specimen Extraction 6.4.3
Slice Flatness 6.4.4
Method in PartAprovides long-term thermal resistance values
Slice Thickness 6.4.5
on a consistent basis that can be used for a variety of purposes,
Stack Composition 6.4.6
including product evaluation, specifications, or product com-
Storage Conditioning 6.5
Test Procedure 6.6
parisons. The Research Method in part B provides a general
Thermal Resistance Measurement Schedule 6.6.1
relationship between thermal conductivity, age, and product
Thermal Resistance Measurements 6.6.2
thickness. Product Density 6.6.3
Calculations 6.7
Part B: The Research Method 7
1
Background 7.1
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
TDSLApparatus 7.2
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
Sampling Schedule 7.3
Measurement.
Specimen Preparation 7.4
Current edition approved May 15, 2011. Published July 2011. Originally
Storage Conditioning 7.5
approved in 1995. Last previous edition approved in 2011 as C1303 – 11. DOI:
Test Procedure 7.6
10.1520/C1303_C1303M-11A.
Calculations 7.7
2
The boldface numbers in parentheses refer to the list of references at the end of
Reporting 8
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/C1303M – 11a
3. Terminology
Reporting for Part A, the Prescriptive Method 8.1
Reporting for Part B, the Research Method 8.2
3.1 Definitions—For definitions of terms and symbols used
Precision and Bias 9
Keywords 10 in this test method, refer to Terminology C168.
Mandatory Information – Qualification Annex
3.2 Definitions 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.
Designation:C1303/C1303M–11 Designation: C1303/C1303M – 11a
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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
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,May 15, 2011. Published MarchJuly 2011. Originally approved in 1995. Last previous edition approved in 20102011 as C1303 – 101.
DOI: 10.1520/C1303_C1303M-11A.
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 – 11a
Representative Replicate Product Sheets 6.3.2
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
...
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