1.1 This specification covers outside-diameter-controlled, black metric-sized and IPS-sized crosslinked polyethylene (PEX) pipe, fittings, and joints made in pipe dimension ratios ranging from 6 to 17 and pressure rated for gas distribution. Included are requirements and test methods for material, workmanship, dimensions, burst pressure, hydrostatic sustained pressure, stabilizer functionality, bent-pipe hydrostatic pressure, degree of crosslinking, chemical resistance, and squeeze-off. Requirements for pipe and fittings markings are also given. The pipe, fittings, and joints covered by this specification are intended for buried gas distribution pressure piping applications. 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. NOTE 1-Metric-sized (SI units) pipe should only be joined with corresponding metric-sized fittings, and IPS-sized pipe should only be joined with corresponding IPS-sized fittings. IPS-sized fittings should not be used for metric-sized pipe, and metric-sized fittings should not be used for IPS-sized pipe. 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.
Keywordscrosslinked polyethylene; hydrostatic stress; PEX; PPI; pipe; pressure; HDB; gas distribution; metric
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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