ASTM-C1303:2008 Edition

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C1303-08e1 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation

Published By	Publication Date	Number of Pages
ASTM	2008	20

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Description

ASTM C1303-08e1

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:

Keywords

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

ICS Code

ICS Number Code 83.100 (Cellular materials)

DOI: 10.1520/C1303-08E01

PDF Catalog

PDF Pages	PDF Title
1	Scope
2	Referenced Documents Terminology
3	Summary of Test Method Significance and Use Part A: The Prescriptive Method
5	FIG. 1
6	FIG. 2 FIG. 3
7	Part B: The Research Method
9	FIG. 4 TABLE 1
10	Report TABLE 2
11	Precision and Bias TABLE 3
12	Keywords A1. QUALIFICATION A1.1 Specimen Preparation A1.2 Homogeneity Qualification A1.3 Aging Equivalence Test Procedure A1.4 Alternate Product Thickness Qualification
13	A1.5 Example Calculations
14	TABLE A1.1 TABLE A1.2 TABLE A1.3
15	A2. PREPARATION OF TEST SPECIMENS FOR SPRAY-FOAM PRODUCTS A2.1 A2.2 A2.3 A2.4 A2.5 A2.6 A2.7 A2.8 A2.9 FIG. A2.1 FIG. A2.2
16	X1. EFFECT OF TDSL X1.1 Background X1.2 Error in the Measured Thermal Resistivity X1.3 Error in the Scaled Time X1.4 X1.5 X1.6
17	FIG. X1.1 FIG. X1.2
18	FIG. X1.3
19	X2. HISTORY OF THE STANDARD X2.1 X2.2 X3. THEORY OF FOAM AGING X3.1 The Aging Process X3.2 Use of Thin Specimens
20	REFERENCES

Additional information

Mandatory Information-Preparation of Test Specimens for Spray-Foam Products	Annex A2
Stack Composition	6.4.6
Part B: The Research Method	7
Representative Replicate Product Sheets	6.3.2
Mandatory Information – Qualification	Annex A1
Reporting	9
Qualification Requirements	6.1.1
Part A: The Prescriptive Method	6
Significance and Use	5
Storage Conditioning	7.5
Sampling Schedule	7.3
Aging Equivalence Test Procedure	A1.3
Scope	1
History of the Standard	Appendix X2
References
Schedule	6.4.2
Specimen Preparation	A1.1
Applicability	6.1
Test Procedure	7.6
TDSL Apparatus	7.2
Facing Permeability	6.1.2
Background	7.1
Effect Of TDSL	Appendix X1
Reporting for Part A, the Prescriptive Method	9.1
Product Density	6.6.3
Terminology	3
Keywords	11
Reference Documents	2
Homogeneity Qualification	A1.2
Alternate Product Thickness Qualification	A1.4
Slice Flatness	6.4.4
Theory of Foam Aging	Appendix X3
Summary of Test Method	4
Replicate Test Specimen Sets	6.3.3
Goal	6.4.1
	Section
Thermal Resistance Measurement Schedule	6.6.1
Slice Thickness	6.4.5
Calculations	7.7
Example Calculations	A1.5
Specimen Extraction	6.4.3
Apparatus	6.2
Precision and Bias	10
Sampling	6.3
Reporting for Part B, the Research Method	9.2
Thermal Resistance Measurements	6.6.2