ASTM C578-23
(Specification)Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
ABSTRACT
This specification covers the standards for 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 proposed for use as thermal insulation. This specification, however, does not cover laminated products manufactured with any type of rigid board facer including fiberboard, perlite board, gypsum board, or oriented strand board. All thermal insulation shall be of uniform density and shall contain sufficient flame retardants to meet the oxygen index of requirements. They shall also meet the physical requirements such as thermal resistance, compressive resistance, flexural strength, water vapor permeance, water absorption, dimensional stability, and oxygen index specified herein.
SCOPE
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.
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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.
Designation: C578 − 23
Standard Specification for
1
Rigid, Cellular Polystyrene Thermal Insulation
This standard is issued under the fixed designation C578; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope ization established in the Decision on Principles for the
2 Development of International Standards, Guides and Recom-
1.1 This specification covers the types, physical properties,
mendations issued by the World Trade Organization Technical
and dimensions of cellular polystyrene boards with or without
Barriers to Trade (TBT) Committee.
facings or coatings made by molding (EPS) or extrusion (XPS)
of expandable polystyrene. Products manufactured to this
2. Referenced Documents
specification are intended for use as thermal insulation for
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temperatures from –65 to +165°F (–53.9 to +73.9°C). This 2.1 ASTM Standards:
specification does not apply to laminated products manufac-
C165 Test Method for Measuring Compressive Properties of
tured with any type of rigid board facer including fiberboard, Thermal Insulations
perlite board, gypsum board, or oriented strand board. C168 Terminology Relating to Thermal Insulation
1.1.1 Additional requirements for Types IV and XIII for C177 Test Method for Steady-State Heat Flux Measure-
pipe, tank, and equipment thermal insulation for temperatures ments and Thermal Transmission Properties by Means of
from –320 to +165°F (–196 to +73.9°C) are contained in the Guarded-Hot-Plate Apparatus
Annex A1. C203 Test Methods for Breaking Load and Flexural Proper-
ties of Block-Type Thermal Insulation
1.2 The use of thermal insulation materials covered by this
C272 Test Method for Water Absorption of Core Materials
specification is potentially regulated by codes that address fire
for Sandwich Constructions
performance. For some end uses, specifiers need to also
C303 Test Method for Dimensions and Density of Pre-
address the effect of moisture and wind pressure resistance.
formed Block and Board–Type Thermal Insulation
Guidelines regarding these end use considerations are included
C335 Test Method for Steady-State Heat Transfer Properties
in Appendix X1.
of Pipe Insulation
1.3 The values stated in inch-pound units are to be regarded
C390 Practice for Sampling and Acceptance of Thermal
as standard. The values given in parentheses are mathematical
Insulation Lots
conversions to SI units that are provided for information only
C518 Test Method for Steady-State Thermal Transmission
and are not considered standard.
Properties by Means of the Heat Flow Meter Apparatus
1.4 This standard does not purport to address all of the
C550 Test Method for Measuring Trueness and Squareness
safety concerns, if any, associated with its use. It is the
of Rigid Block and Board Thermal Insulation
responsibility of the user of this standard to establish appro-
C870 Practice for Conditioning of Thermal Insulating Ma-
priate safety, health, and environmental practices and deter- terials
mine the applicability of regulatory limitations prior to use.
C1045 Practice for Calculating Thermal Transmission Prop-
1.5 This international standard was developed in accor- erties Under Steady-State Conditions
dance with internationally recognized principles on standard-
C1058 Practice for Selecting Temperatures for Evaluating
and Reporting Thermal Properties of Thermal Insulation
C1114 Test Method for Steady-State Thermal Transmission
1
This specification is under the jurisdiction of ASTM Committee C16 on
Properties by Means of the Thin-Heater Apparatus
Thermal Insulation and is the direct responsibility of Subcommittee C16.22 on
C1303 Test Method for Predicting Long-Term Thermal Re-
Organic and Nonhomogeneous Inorganic Thermal Insulations.
sistance of Closed-Cell Foam Insulation
Current edition approved Sept. 1, 2023. Published October 2023. Originally
approved in 1965. Last previous edition approved in 2022 as C578 – 22. DOI:
10.1520/C0578-23.
2
This specification is similar to ISO 4898-1984, “Cellular Plastics–Specification
3
for Rigid Cellular Materials Used in the Thermal Insulation of Buildings,” in title For referenced ASTM standards, visit the ASTM website, www.astm.org, or
only. The scope and technical content are significantly different. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ISO standards are available from American National Standards Inst
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C578 − 22 C578 − 23
Standard Specification for
1
Rigid, Cellular Polystyrene Thermal Insulation
This standard is issued under the fixed designation C578; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
2
1.1 This specification 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.
2. Referenced Documents
3
2.1 ASTM Standards:
C165 Test Method for Measuring Compressive Properties of Thermal Insulations
C168 Terminology Relating to Thermal Insulation
1
This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.22 on Organic and
Nonhomogeneous Inorganic Thermal Insulations.
Current edition approved Aug. 1, 2022Sept. 1, 2023. Published August 2022October 2023. Originally approved in 1965. Last previous edition approved in 20192022 as
C578 – 19.C578 – 22. DOI: 10.1520/C0578-22.10.1520/C0578-23.
2
This specification is similar to ISO 4898-1984, “Cellular Plastics–Specification for Rigid Cellular Materials Used in the Thermal Insulation of Buildings,” in title only.
The scope and technical content are significantly different.
ISO standards are available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C578 − 23
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
C203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
C272 Test Method for Water Absorption of Core Materials for Sandwich Constructions
C303 Test Method for Dimensions and Density of Preformed Block and Board–Type Thermal Insulation
C335 Test Method for Steady-State Heat Transfer Properties of Pipe Insulation
C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C550 Test Method for Measuring Truenes
...
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