ASTM C1303/C1303M-22
Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation

Standard No.

ASTM C1303/C1303M-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C1303/C1303M-23

Latest

ASTM C1303/C1303M-23

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 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. 1.7 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 Conditioning 7.5 Test Procedure 7.6 Calculations 7.7 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 June 1, 2022. Published July 2022. Originally approved in 1995. Last previous edition approved in 2019 as C1303/C1303M – 19. DOI: 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 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. 1 Reporting 8 Reporting for Part A, the Prescriptive Method 8.1 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 Qualification A1.2 Thermal Conductivity 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 1.9 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.

ASTM C1303/C1303M-22 Referenced Document

• ASTM C1029 Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• ASTM C1045 Standard Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
• ASTM C1126 Standard Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation
• ASTM C1289 Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board
• ASTM C168 Standard Terminology Relating to Thermal Insulation
• ASTM C177 Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
• ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
• ASTM C578 Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
• ASTM C591 Standard Specification for Unfaced Preformed Rigid Cellular Polyurethane Thermal Insulation
• ASTM D1622 Standard Test Method for Apparent Density of Rigid Cellular Plastics
• ASTM D6226 Standard Test Method for Open Cell Content of Rigid Cellular Plastics

ASTM C1303/C1303M-22 history

• 2023 ASTM C1303/C1303M-23 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2022 ASTM C1303/C1303M-22 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2019 ASTM C1303/C1303M-19 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2015 ASTM C1303/C1303M-15 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2014 ASTM C1303/C1303M-14 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2012 ASTM C1303/C1303M-12 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2011 ASTM C1303/C1303M-11a Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2011 ASTM C1303/C1303M-11 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2010 ASTM C1303/C1303M-10 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2009 ASTM C1303-09a Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2009 ASTM C1303-09 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2008 ASTM C1303-08e1 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2008 ASTM C1303-08 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2007 ASTM C1303-07 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• 2000 ASTM C1303-00 Standard Test Method for Estimating the Long-Term Change in the Thermal Resistance of Unfaced Rigid Closed Cell Plastic Foams by Slicing and Scaling Under Controlled Laboratory Conditions