ASTM F2968/F2968M-20
(Specification)Standard Specification for Crosslinked Polyethylene (PEX) Pipe for Gas Distribution Applications
Standard Specification for Crosslinked Polyethylene (PEX) Pipe for Gas Distribution Applications
SCOPE
1.1 This specification covers outside diameter controlled, metric-sized and inch-sized black or yellow crosslinked polyethylene (PEX) pipe, 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, minimum operating temperature and squeeze-off. Requirements for pipe markings are also given. The pipe covered by this specification is intended for buried gas distribution and gas transmission pressure piping applications.
1.2 This specification also includes requirements for joints made between PEX pipe and polyethylene electrofusion fittings (such as Specification F1055). Fittings to be used with PEX pipe manufactured to this specification are in Specification F2829. Installation considerations are in X3.2.
Note 1: Inch-sized fittings should not be used for metric-sized pipe, and metric-sized fittings should not be used for inch-sized pipe.
1.3 The text of this specification references notes, footnotes, and appendixes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.4 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
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.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation:F2968/F2968M −20 An American National Standard
Standard Specification for
Crosslinked Polyethylene (PEX) Pipe for Gas Distribution
1
Applications
ThisstandardisissuedunderthefixeddesignationF2968/F2968M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers outside diameter controlled,
ization established in the Decision on Principles for the
metric-sized and inch-sized black or yellow crosslinked poly-
Development of International Standards, Guides and Recom-
ethylene (PEX) pipe, made in pipe dimension ratios ranging
mendations issued by the World Trade Organization Technical
from 6 to 17, and pressure rated for gas distribution. Included
Barriers to Trade (TBT) Committee.
are requirements and test methods for material, workmanship,
dimensions, burst pressure, hydrostatic sustained pressure,
2. Referenced Documents
stabilizer functionality, bent-pipe hydrostatic pressure, degree
2
2.1 ASTM Standards:
of crosslinking, chemical resistance, minimum operating tem-
D543 Practices for Evaluating the Resistance of Plastics to
perature and squeeze-off. Requirements for pipe markings are
Chemical Reagents
also given. The pipe covered by this specification is intended
D618 Practice for Conditioning Plastics for Testing
forburiedgasdistributionandgastransmissionpressurepiping
D792 Test Methods for Density and Specific Gravity (Rela-
applications.
tive Density) of Plastics by Displacement
1.2 This specification also includes requirements for joints
D1505 Test Method for Density of Plastics by the Density-
made between PEX pipe and polyethylene electrofusion fit-
Gradient Technique
tings (such as Specification F1055). Fittings to be used with
D1598 Test Method for Time-to-Failure of Plastic Pipe
PEX pipe manufactured to this specification are in Specifica-
Under Constant Internal Pressure
tion F2829. Installation considerations are in X3.2.
D1599 Test Method for Resistance to Short-Time Hydraulic
Pressure of Plastic Pipe, Tubing, and Fittings
NOTE 1—Inch-sized fittings should not be used for metric-sized pipe,
and metric-sized fittings should not be used for inch-sized pipe.
D1600 Terminology forAbbreviatedTerms Relating to Plas-
tics
1.3 The text of this specification references notes, footnotes,
D1603 Test Method for Carbon Black Content in Olefin
and appendixes, which provide explanatory material. These
Plastics
notesandfootnotes(excludingthoseintablesandfigures)shall
D2122 Test Method for Determining Dimensions of Ther-
not be considered as requirements of the specification.
moplastic Pipe and Fittings
1.4 Units—The values stated in either SI units or inch-
D2290 Test Method for Apparent Hoop Tensile Strength of
pound units are to be regarded separately as standard. The
Plastic or Reinforced Plastic Pipe
values stated in each system are not necessarily exact equiva-
D2565 Practice for Xenon-Arc Exposure of Plastics In-
lents; therefore, to ensure conformance with the standard, each
tended for Outdoor Applications
system shall be used independently of the other, and values
D2765 Test Methods for Determination of Gel Content and
from the two systems shall not be combined.
Swell Ratio of Crosslinked Ethylene Plastics
1.5 This standard does not purport to address all of the
D2837 Test Method for Obtaining Hydrostatic Design Basis
safety concerns, if any, associated with its use. It is the
forThermoplasticPipeMaterialsorPressureDesignBasis
responsibility of the user of this standard to establish appro-
for Thermoplastic Pipe Products
priate safety and health practices and determine the applica-
D4218 Test Method for Determination of Carbon Black
bility of regulatory limitations prior to use.
Content in Polyethylene Compounds by the Muffle-
Furnace Technique
1
This specification is under the jurisdiction ofASTM Committee F17 on Plastic
2
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2020. Published April 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2014. Last previous edition approved in 2014 as D2968/D2968M–14a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F2968/F2968M–20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoh
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2968/F2968M − 14a F2968/F2968M − 20 An American National Standard
Standard Specification for
Black Crosslinked Polyethylene (PEX) Pipe, Fittings and
1
Joints For Pipe for Gas Distribution Applications
This standard is issued under the fixed designation F2968/F2968M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers outside diameter controlled, black metric-sized and IPS-sized inch-sized black or yellow
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, minimum
operating temperature and squeeze-off. Requirements for pipe and fittings markings are also given. The pipe, fittings and joints pipe
covered by this specification areis intended for buried gas distribution and gas transmission pressure piping applications.
1.2 This specification also includes requirements for joints made between PEX pipe and polyethylene electrofusion fittings
(such as Specification F1055). Fittings to be used with PEX pipe manufactured to this specification are in Specification F2829.
Installation considerations are in X3.2.
NOTE 1—Inch-sized fittings should not be used for metric-sized pipe, and metric-sized fittings should not be used for inch-sized pipe.
1.3 The text of this specification references notes, footnotes, and appendixes, which provide explanatory material. These notes
and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.4 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
NOTE 1—Metric sized (SI units) pipe should only be joined with corresponding metric sized fittings, and inch sized pipe should only be joined with
corresponding inch sized fittings. Inch sized fittings should not be used for metric sized pipe, and metric sized fittings should not be used for inch sized
pipe.
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.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D618 Practice for Conditioning Plastics for Testing
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1603 Test Method for Carbon Black Content in Olefin Plastics
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Nov. 1, 2014March 1, 2020. Published December 2014April 2020. Originally approved in 2014. Last previous edition approved in 2014 as
D2968/D2968M–14.–14a. DOI: 10.1520/F2968–14A.10.1520/F2968/F2968M–20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the AST
...
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