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    ASTM C921-10(2015)

    Standard Practice for Determining the Properties of Jacketing Materials for Thermal Insulation (Withdrawn 2021)

    Withdrawn Standard: ASTM C921-10(2015) | Developed by Subcommittee: C16.33


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    Withdrawn Rationale:

    Formerly under the jurisdiction of Committee C16 on Thermal Insulation, this practice was withdrawn in September 2021. This standard is being withdrawn without replacement due to its limited use by industry.

    1. Scope

    1.1 This practice covers jackets applied over thermal insulation on piping and equipment, including materials applied solely for physical protection, and materials applied as vapor retarders.

    1.2 This practice provides material and physical requirements, or both, for jackets. Guidance in selecting the proper jacket for a given application can be found in Guide C1423.

    1.3 This practice does not cover field applied mastics or barrier coatings and their attendant reinforcements, nor does it cover jackets for buried insulation systems.

    1.4 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.

    1.5 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 limitations prior to use.



    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

    A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

    A336/A336M Specification for Alloy Steel Forgings for Pressure and High-Temperature Parts

    A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

    A792/A792M Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

    B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate

    C168 Terminology Relating to Thermal Insulation

    C390 Practice for Sampling and Acceptance of Thermal Insulation Lots

    C921

    C1258 Test Method for Elevated Temperature and Humidity Resistance of Vapor Retarders for Insulation

    C1263 Test Method for Thermal Integrity of Flexible Water Vapor Retarders

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

    C1423 Guide for Selecting Jacketing Materials for Thermal Insulation

    D774/D774M Test Method for Bursting Strength of Paper

    D828 Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus

    D882 Test Method for Tensile Properties of Thin Plastic Sheeting

    D1204 Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E96/E96M Test Methods for Water Vapor Transmission of Materials

    TAPPI Standards

    T461 Flame Resistance of Treated Paper and Paperboard Available from Technical Association of the Pulp and Paper Industry (TAPPI), 15 Technology Parkway South, Suite 115, Peachtree Corners, GA 30092, http://www.tappi.org.


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

    DOI: 10.1520/C0921-10R15

    Citation Format

    ASTM C921-10(2015), Standard Practice for Determining the Properties of Jacketing Materials for Thermal Insulation (Withdrawn 2021), ASTM International, West Conshohocken, PA, 2015, www.astm.org

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