ASTM WK41438

    New Specification for Specification for Modified Asphalt Protective Jacket for Use over Thermal Insulation

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    Developed by Subcommittee: C16.40 | Committee C16 | Contact Staff Manager



    WK41438

    1. Scope

    1.Scope 1.1.This specification addresses the minimum performance for flexible protective jackets using a laminated foil/polymer film coated with modified asphalt for use over thermal insulation on pipes, duct, and equipment operating at both above and below ambient temperatures and installed outdoors, above ground. This specification also includes flexible jackets incorporating polymer/foil laminates coated with modified asphalt used as vapor barriers in direct burial applications of insulated pipe. It does not include the following: protective metal jacket, homogenous plastic film jacket materials, laminate jacket materials using pressure sensitive adhesives, and butyl rubber membranes. For aluminum jacket, see C1729. 1.2.These types of materials consist of a laminate of polymer film and foil to which is applied a coating of asphalt that has been typically modified with SBS synthetic rubber. Vapor retarders not intended as protective jackets are addressed in specification C1136. 1.3.This specification includes jacket materials designed for use outdoors and below grade in direct burial applications. 1.4.While all jacket materials covered by this specification have low water vapor permeance values, they are not necessarily always used as vapor retarders. The water vapor transmission tests are for the jacket materials only and not for overlaps or taped joints. All materials are weather resistant and of sufficient strength to provide some degree of protection for mechanical insulation. 1.5.Materials covered under this specification for outdoor use will have a high, medium, or low surface emittance and are available in more than one color. 1.6.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. 1.7.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.

    This type of jacketing has been commercially available for a long time so an ASTM specification is long overdue.


    Keywords

    rubber jacketing:asphalt jacketing:direct burial

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    03-22-2013

    Technical Contact:
    Anthony Garone

    Status:
    Draft Under Development