ASTM WK24164

    New Specification for Standard Specification for Pre-Insulated and Jacketed Thermal Distribution Piping Systems (non-air gap, polyurethane insulated systems)

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


    1. Scope

    This specification covered directly buried underground and above ground supported pre-insulated piping systems used to convey pressurized fluids for direct heating and cooling, geothermal, solar, waste heat recovery, cryogen liquids, process fluids, hot and cold water systems, fuel, and other fluids. The insulated piping systems covered by this specificaiton do not possess an air gap between the insulation and jacket. The three are bonded together. This specification coveres only piping systems insulated by bonded polyurethane rigid foam and jacketed by high-density polyethylene or fiberglass reinforced plastic. The systems and units covered by this specification are intended for long term service from -320 F (-196 C) to +250 F (+121 C) directly buried or supported above ground.


    pre-insulated pipe, polyurethane foam, buried pipe, above ground pipe, non-air gap


    It is needed because there are no industry standards for pre-insulated pipes. It will be used by mechanical specifiers of fluid distributions systems that require insulation and therefore may well use pre-insulated systems.

    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:

    Technical Contact:
    Robert Maffei


    C16.40 (20-01)

    Negative Votes Need Resolution