ASTM C1676/C1676M-19 - 1.9.2019
 
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

C795-08(2023)

Standard Specification for Thermal Insulation for Use in Contact with Austenitic Stainless Steel

C302-13(2022)

Standard Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation

C585-22

Standard Practice for Inner and Outer Diameters of Thermal Insulation for Nominal Sizes of Pipe and Tubing

C303-21

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

C335-05a

Standard Test Method for Steady-State Heat Transfer Properties of Pipe 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

C168-25

Standard Terminology Relating to Thermal Insulation

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

C356-22

Standard Test Method for Linear Shrinkage of Preformed High-Temperature Thermal Insulation Subjected to Soaking Heat

E84-26a

Standard Test Method for Surface Burning Characteristics of Building Materials (Includes all amendments and changes 4/15/2026).

C165-23

Standard Test Method for Measuring Compressive Properties of Thermal Insulations

C1104/C1104M-19(2025)

Standard Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation

C1045-19(2026)

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

C201-24

Standard Test Method for Thermal Conductivity of Refractories

C665-24

Standard Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing