ASTM C1676/C1676M-23

Standard Specification for Microporous Thermal Insulation

SCOPE
1.1 This specification covers the composition, physical properties, and product forms of microporous thermal insulation for use on surfaces at temperatures from 80°C [176°F] up to 1150°C [2102°F], unless otherwise agreed upon by the manufacturer and purchaser.  
1.2 This specification only covers microporous thermal insulation comprising compacted powder, fibers and opacifiers.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.20 - Homogeneous Inorganic Thermal Insulations

Standards Content (Sample)

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: C1676/C1676M − 23
Standard Specification for
1
Microporous Thermal Insulation
This standard is issued under the fixed designation C1676/C1676M; 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.
1. Scope the Guarded-Hot-Plate Apparatus
C201 Test Method for Thermal Conductivity of Refractories
1.1 This specification covers the composition, physical
C302 Test Method for Density and Dimensions of Pre-
properties, and product forms of microporous thermal insula-
formed Pipe-Covering-Type Thermal Insulation
tion for use on surfaces at temperatures from 80°C [176°F] up
C303 Test Method for Dimensions and Density of Pre-
to 1150°C [2102°F], unless otherwise agreed upon by the
formed Block and Board–Type Thermal Insulation
manufacturer and purchaser.
C335 Test Method for Steady-State Heat Transfer Properties
1.2 This specification only covers microporous thermal
of Pipe Insulation
insulation comprising compacted powder, fibers and opacifiers.
C356 Test Method for Linear Shrinkage of Preformed High-
Temperature Thermal Insulation Subjected to Soaking
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in Heat
C390 Practice for Sampling and Acceptance of Thermal
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be Insulation Lots
C518 Test Method for Steady-State Thermal Transmission
used independently of the other, and values from the two
systems shall not be combined. Properties by Means of the Heat Flow Meter Apparatus
C585 Practice for Inner and Outer Diameters of Thermal
1.4 This standard does not purport to address all of the
Insulation for Nominal Sizes of Pipe and Tubing
safety concerns, if any, associated with its use. It is the
C665 Specification for Mineral-Fiber Blanket Thermal Insu-
responsibility of the user of this standard to establish appro-
lation for Light Frame Construction and Manufactured
priate safety, health, and environmental practices and deter-
Housing
mine the applicability of regulatory limitations prior to use.
C795 Specification for Thermal Insulation for Use in Con-
1.5 This international standard was developed in accor-
tact with Austenitic Stainless Steel
dance with internationally recognized principles on standard-
C1045 Practice for Calculating Thermal Transmission Prop-
ization established in the Decision on Principles for the
erties Under Steady-State Conditions
Development of International Standards, Guides and Recom-
C1104/C1104M Test Method for Determining the Water
mendations issued by the World Trade Organization Technical
Vapor Sorption of Unfaced Mineral Fiber Insulation
Barriers to Trade (TBT) Committee.
E84 Test Method for Surface Burning Characteristics of
Building Materials
2. Referenced Documents
2
2.1 ASTM Standards:
3. Terminology
C165 Test Method for Measuring Compressive Properties of
3.1 Definitions—For definitions used in this specification,
Thermal Insulations
see Terminology C168.
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measure-
3.2 Definitions of Terms Specific to This Standard:
ments and Thermal Transmission Properties by Means of
3.2.1 flexible microporous insulation, n— nsulation that is
capable of conforming to a non planar surface being insulated
without damage over a specified temperature range.
1
This specification is under the jurisdiction of ASTM Committee C16 on
3.2.2 rigid microporous insulation , n—insulation that will
Thermal Insulation and is the direct responsibility of Subcommittee C16.20 on
Homogeneous Inorganic Thermal Insulations.
be damaged when forced to conform to a non-planar surface
Current edition approved June 1, 2023. Published July 2023. Originally approved
being insulated.
in 2008. Last previous edition approved in 2019 as C1676/C1676M – 19. DOI:
10.1520/C1676_C1676M-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4. Classification
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.1 Microporous thermal insulation covered by this specifi-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cation shall be classified into three types as shown in Table 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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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: C1676/C1676M − 19 C1676/C1676M − 23
Standard Specification for
1
Microporous Thermal Insulation
This standard is issued under the fixed designation C1676/C1676M; 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.
1. Scope
1.1 This specification covers the composition, physical properties, and product forms of microporous thermal insulation for use
on surfaces at temperatures from 80°C [176°F] up to 1150°C [2102°F], unless otherwise agreed upon by the manufacturer and
purchaser.
1.2 This specification only covers microporous thermal insulation comprising compacted powder, fibers and opacifiers.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
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
2
2.1 ASTM Standards:
C165 Test Method for Measuring Compressive Properties of Thermal Insulations
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
C201 Test Method for Thermal Conductivity of Refractories
C302 Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation
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
C356 Test Method for Linear Shrinkage of Preformed High-Temperature Thermal Insulation Subjected to Soaking Heat
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
C585 Practice for Inner and Outer Diameters of Thermal Insulation for Nominal Sizes of Pipe and Tubing
1
This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.20 on Homogeneous
Inorganic Thermal Insulations.
Current edition approved Sept. 1, 2019June 1, 2023. Published October 2019July 2023. Originally approved in 2008. Last previous edition approved in 20142019 as
C1676/C1676M – 14.C1676/C1676M – 19. DOI: 10.1520/C1676_C1676M-19.10.1520/C1676_C1676M-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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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C1676/C1676M − 23
C665 Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing
C795 Specification for Thermal Insulation for Use in Contact with Austenitic Stainless Steel
C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
C1104/C1104M Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation
E84 Test Method for Surface Burning Characteristics of Building Materials
3. Terminology
3.1 Definitions—For definitions used in this specification, see Terminology C168.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 flexible microporous insulation, n— nsulation that is capable of conforming to a non planar surface being insulated without
damage over a specified temperature range.
3.2.2 rigid microporous insulat
...