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  • ASTM
    C1303/C1303M-11 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
    Edition: 2011
    $134.78
    Unlimited Users per year

Description of ASTM-C1303 2011

ASTM C1303/C1303M-11

Historical Standard: ASTM C1303/C1303M-11 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation

SUPERSEDED (see Active link, below)




ASTM C1303 / C1303M

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 conditions (1-5) .

Note 1See 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 2See 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C168 Terminology Relating to Thermal Insulation

C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus

C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

C578 Specification for Rigid, Cellular Polystyrene Thermal Insulation

C591 Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation

C1029 Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation

C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions

C1126 Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation

C1289 Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board

D1622 Test Method for Apparent Density of Rigid Cellular Plastics

D6226 Test Method for Open Cell Content of Rigid Cellular Plastics

E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

Other Standards

CAN/ULCS770 Standard Test Method for Determination of Long-Term Thermal Resistance of Closed-Cell Thermal Insulation Foams Underwriters Laboratory of Canada, 333 Pfingsten Road, Northbrook, IL 60062-2096 USA,www.ulc.ca

Keywords

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


ICS Code

ICS Number Code 83.100 (Cellular materials)


DOI: 10.1520/C1303_C1303M-11

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About ASTM

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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