ASTM C240-97 - 10.9.1997
 
1. Scope

1.1 These test methods cover the testing of cellular glass insulation block for density, water absorption, compressive strength, flexural strength at ambient temperature; preparation for chemical analysis; and thermal conductivity measurements.

1.2 The values stated in SI are generally to be regarded as the standard. The SI dimensions are to be used for material supplied in metric sizes. The inch dimensions are to be used for material supplied in inch sizes.

1.3 This standard does not purport to address all of the safety problems 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

C168-25

Standard Terminology Relating to Thermal Insulation

C177-19(2026)

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

NRC 1.36

Nonmetallic Thermal Insulation for Austenitic Stainless Steel Available from Director of Regulatory Standards, US Atomic Energy Commission, Washington, DC 20545.

MIL-I-24244

Specification Insulation Materials with Special Corrosion, Chloride, and Fluoride Requirements Available from DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.

ISO 3951

Sampling Procedure and Charts for Inspection by Variables for Percent Nonconforming Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

D4869/D4869M-16a(2025)

Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing (Includes all amendments and changes 12/8/2025).

D226/D226M-25

Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

C871-18(2023)

Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions

C518-21

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

C390-08(2024)

Standard Practice for Sampling and Acceptance of Thermal Insulation Lots

C165-23

Standard Test Method for Measuring Compressive Properties of Thermal Insulations

C303-21

Standard Test Method for Dimensions and Density of Preformed Block and Board–Type Thermal Insulation

C203-22

Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation