1.1 This specification2 covers the types, physical properties, and dimensions of cellular polystyrene boards with or without facings or coatings made by molding (EPS) or extrusion (XPS) of expandable polystyrene. Products manufactured to this specification are intended for use as thermal insulation for temperatures from –65 to +165°F (–53.9 to +73.9°C). This specification does not apply to laminated products manufactured with any type of rigid board facer including fiberboard, perlite board, gypsum board, or oriented strand board.
1.1.1 Additional requirements for Types IV and XIII for pipe, tank, and equipment thermal insulation for temperatures from –320 to +165°F (–196 to +73.9°C) are contained in Annex A1.
1.2 The use of thermal insulation materials covered by this specification is potentially regulated by codes that address fire performance. For some end uses, specifiers need to also address the effect of moisture and wind pressure resistance. Guidelines regarding these end use considerations are included in Appendix X1.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
1.5 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 C578-22 Referenced Document
ASTM C1045 Standard Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
ASTM C1058 Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
ASTM C1114 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus
ASTM C1303 Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation*, 2024-04-22 Update
ASTM C1363 Standard Test Method for the Thermal Performance of Building Assemblies by Means of a Hot Box Apparatus
ASTM C1512 Standard Test Method for Characterizing the Effect of Exposure to Environmental Cycling on Thermal Performance of Insulation Products
ASTM C165 Standard Test Method for Measuring Compressive Properties of Thermal Insulations
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 C203 Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
ASTM C272 Standard Test Method for Water Absorption of Core Materials for Structural Sandwich Constructions
ASTM C303 Standard Test Method for Dimensions and Density of Preformed Block and Broad-Type Thermal Insulation
ASTM C335 Standard Test Method for Steady-State Heat Transfer Properties of Horizontal Pipe Insulation
ASTM C390 Standard Criteria for Sampling and Acceptance of Preformed Thermal Insulation Lots
ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
ASTM C550 Standard Test Method for Measuring Trueness and Squareness of Rigid Block and Board Thermal Insulation
ASTM C870 Standard Practice for Conditioning of Thermal Insulating Materials
ASTM D1600 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D1621 Standard Test Method for Compressive Properties of Rigid Cellular Plastics
ASTM D1622 Standard Test Method for Apparent Density of Rigid Cellular Plastics
ASTM D2126 Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging
ASTM D2863 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-like Combustion of Plastics (Oxygen Index)