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  • ASTM
    C1303-08 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
    Edition: 2008
    $93.60
    Unlimited Users per year

Description of ASTM-C1303 2008

ASTM C1303-08

Historical Standard: Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation




ASTM C1303

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-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
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 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 Conditioning 7.5
Test Procedure 7.6
Calculations 7.7
Reporting 9
Reporting for Part A, the Prescriptive Method 9.1
Reporting for Part B, the Research Method 9.2
Precision and Bias 10
Keywords 11
Mandatory Information – Qualification Annex A1
Specimen Preparation A1.1
Homogeneity Qualification A1.2
Aging Equivalence Test Procedure A1.3
Alternate Product Thickness Qualification A1.4
Example Calculations A1.5
Mandatory Information-Preparation of Test Specimens for Spray-Foam Products Annex A2
Effect Of TDSL Appendix X1
History of the Standard Appendix X2
Theory of Foam Aging Appendix X3
References

Keywords

aging; long-term thermal resistance; LTTR; rigid closed-cell plastic foams; scaling factors; thermal insulation; thermal resistance; time-averaged thermal resistance; Aging resistance; Controlled testing conditions/environments; Foamed-in-place thermal insulation; Long-term behavior/performance; Phenolic plastics; Polyisocyanurate insulation; Polystyrene (PS); Polyurethane insulation; Rigid closed cell plastic foams; Rigid thermal insulation; Scaling; Spray-applied thermal insulation; Thermal insulating materials; Thermal resistance/resistivity; Time-averaged thermal resistance; Unfaced thermal insulation


ICS Code

ICS Number Code 83.100 (Cellular materials)


DOI: 10.1520/C1303-08

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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