ASTM WK57078

    New Specification for Metric- and Inch-Sized Cross-Linked Polyethylene (PEX) Pipe Using the Minimum Required Strength (MRS) Pressure Rating Method

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    Developed by Subcommittee: F17.26 | Committee F17 | Contact Staff Manager



    WK57078

    1. Scope

    1.1 This specification covers cross-linked polyethylene (PEX) pipe that is outside diameter controlled in metric pipe sizes 16 to 1000 mm and inch pipe sizes 3 to 54 in., made in nominal pipe dimension ratios and pressure rated for water using the ISO 9080 MRS test method. This specification is similar to Specification F2788 that uses the Test Method D2837 HDB test method for pressure rating. Included are requirements and test methods for material, workmanship, dimensions, burst pressure, hydrostatic sustained pressure, excessive temperature-pressure, environmental stress cracking, stabilizer functionality, bent-pipe hydrostatic pressure, oxidative stability in potable chlorinated water, minimum operating temperature, and degree of cross-linking. Requirements for pipe markings are also given. The pipe covered by this specification is intended for pressure piping applications such as industrial and general-purpose pipelines, potable water pipelines, and fireextinguishing pipelines. 1.2 The text of this specification references notes, footnotes, and appendixes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.3 Units--The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 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 and health practices and determine the applicability of regulatory limitations prior to use.


    Keywords

    cross-linked polyethylene; MRS; CRS; design stress; PEX

    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:
    12-24-2016

    Technical Contact:
    Eugene Palermo

    Status:
    Draft Under Development