ASTM C1594 - 11

    Standard Specification for Polyimide Rigid Cellular Thermal Insulation

    Active Standard ASTM C1594 | Developed by Subcommittee: C16.22

    Book of Standards Volume: 04.06

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    This specification establishes the composition and physical properties of rigid polyimide cellular foams intended for use as thermal and sound-isolating insulation in commercial and industrial environments. The polyimide insulations covered are classified into three types (Types I, II, and III) according to closed cell content, and into four grades (Grades 1, 2, 3, and 4) according to density. Type II insulation is further divided into two classes (Classes 1 and 2) according to upper temperature limits. Materials shall be manufactured from the appropriate monomers and necessary ingredients. Specimens shall be sampled, tested, and conform accordingly to the following physical property requirements: apparent thermal conductivity; water and gas permeability; density; percent closed cell; upper temperature limit; high temperature stability; compressive strength; compressive force deflection; water vapor transmission; steam aging characteristics (tensile strength, dimensional and weight changes), corrosiveness; chemical resistance; vertical burn characteristics (flame application and time, burn length, and dripping); specific optical smoke density for both flaming and non-flaming exposures; toxic smoke generation; surface burning characteristics (flame spread and smoke developed indices); combustion by-products (carbon monoxide, hydrogen fluoride, hydrogen chloride, nitrogen oxides, sulfur dioxide, and hydrogen cyanide); oxygen index, and ¼ scale room burn.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers the composition and physical properties of polyimide foam insulation with nominal densities from 1.0 lb/ft3 to 8.0 lb/ft3 (16 kg/m3 to 128 kg/m3) and intended for use as thermal and sound-isolating insulation for temperatures from 423°F to +600°F (253°C to +316°C) in commercial and industrial environments.

    1.1.1 The annex shall apply to this specification for marine applications.

    1.1.2 This standard is designed as a material specification and not a design document.

    1.1.3 The values stated in Table 1 and Table 2 are not to be used as design values. It is the buyers responsibility to specify design requirements and obtain supporting documentation from the material supplier.

    1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units are given in parentheses for information only and are approximate.

    1.3 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 and health practices and determine the applicability of regulatory requirements prior to use.

    Note 1—The subject matter of this material specification is not covered by any other ASTM specification. There is no known ISO standard covering the subject of this standard.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    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

    C335 Test Method for Steady-State Heat Transfer Properties of Pipe Insulation

    C390 Practice for Sampling and Acceptance of Thermal Insulation Lots

    C411 Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation

    C421 Test Method for Tumbling Friability of Preformed Block-Type and Preformed Pipe-Covering-Type Thermal Insulation

    C447 Practice for Estimating the Maximum Use Temperature of Thermal Insulations

    C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

    C634 Terminology Relating to Building and Environmental Acoustics

    C665 Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing

    C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions

    C1058 Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation

    C1114 Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus

    C1304 Test Method for Assessing the Odor Emission of Thermal Insulation Materials

    C1338 Test Method for Determining Fungi Resistance of Insulation Materials and Facings

    C1482 Specification for Polyimide Flexible Cellular Thermal and Sound Absorbing Insulation

    C1559 Test Method for Determining Wicking of Fibrous Glass Blanket Insulation (Aircraft Type)

    D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents

    D638 Test Method for Tensile Properties of Plastics

    D1621 Test Method for Compressive Properties of Rigid Cellular Plastics

    D2126 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging

    D2863 Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)

    D3574 Test Methods for Flexible Cellular Materials--Slab, Bonded, and Molded Urethane Foams

    D6226 Test Method for Open Cell Content of Rigid Cellular Plastics

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E96/E96M Test Methods for Water Vapor Transmission of Materials

    E176 Terminology of Fire Standards

    E662 Test Method for Specific Optical Density of Smoke Generated by Solid Materials

    E2231 Practice for Specimen Preparation and Mounting of Pipe and Duct Insulation Materials to Assess Surface Burning Characteristics

    U.S. Federal Standards

    FAR 25.853(a), Appendix F, Part 1, (a) (1) (i) Test Criteria and Procedures for Showing Compliance with Sec. 25.853, or 25.855 Federal Aviation Regulations Part 25 (Airworthiness Standards, Transport Category Aircraft, and Section 25.853. Procedure in appendix F, Part I (a) (1) (i) and (ii). Available from Superintendent of Documents, U.S. Government Printing Office P.O. Box 371954, Pittsburgh, PA 15250-7954.

    ICS Code

    ICS Number Code 83.100 (Cellular materials); 91.120.10 (Thermal insulation of buildings)

    UNSPSC Code

    UNSPSC Code 30141500(Thermal insulation); 30141601(Acoustical insulation)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C1594-11

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM C1594-11, Standard Specification for Polyimide Rigid Cellular Thermal Insulation, ASTM International, West Conshohocken, PA, 2011,

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