ASTM F2968/F2968M-14a
(Specification)Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution Applications
Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution Applications
ABSTRACT
This specification covers the requirements and corresponding test methods for 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 provided, along with quality assurance. The pipe, fittings and joints covered by this specification are intended for buried gas distribution pressure piping applications. Several tables list the PEX pipe material designation codes; metric-sized outside diameters and tolerances for PEX pipe; inch-sized outside diameters and tolerances for PEX pipe; metric-sized wall thickness and tolerances for PEX plastic pipe; inch-sized wall thickness and tolerances for PEX plastic pipe; and pipe category.
SCOPE
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 and gas transmission pressure piping applications.
1.2 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.
1.3 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 non-conformance with the standard.
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.
1.4 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.
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Designation:F2968/F2968M −14a An American National Standard
Standard Specification for
Black Crosslinked Polyethylene (PEX) Pipe, Fittings and
1
Joints For Gas Distribution 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers outside diameter controlled,
D543 Practices for Evaluating the Resistance of Plastics to
black metric-sized and IPS-sized crosslinked polyethylene
Chemical Reagents
(PEX) pipe, fittings and joints, made in pipe dimension ratios
D618 Practice for Conditioning Plastics for Testing
ranging from 6 to 17, and pressure rated for gas distribution.
D792 Test Methods for Density and Specific Gravity (Rela-
Included are requirements and test methods for material,
tive Density) of Plastics by Displacement
workmanship, dimensions, burst pressure, hydrostatic sus-
D1505 Test Method for Density of Plastics by the Density-
tained pressure, stabilizer functionality, bent-pipe hydrostatic
Gradient Technique
pressure, degree of crosslinking, chemical resistance, and
D1598 Test Method for Time-to-Failure of Plastic Pipe
squeeze-off. Requirements for pipe and fittings markings are
Under Constant Internal Pressure
also given. The pipe, fittings and joints covered by this
D1599 Test Method for Resistance to Short-Time Hydraulic
specification are intended for buried gas distribution and gas
Pressure of Plastic Pipe, Tubing, and Fittings
transmission pressure piping applications.
D1600 Terminology forAbbreviatedTerms Relating to Plas-
tics
1.2 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
D2290 Test Method for Apparent Hoop Tensile Strength of
1.3 Units—The values stated in either SI units or inch-
Plastic or Reinforced Plastic Pipe
pound units are to be regarded separately as standard. The
D2765 Test Methods for Determination of Gel Content and
values stated in each system may not be exact equivalents;
Swell Ratio of Crosslinked Ethylene Plastics
therefore,eachsystemshallbeusedindependentlyoftheother.
D2837 Test Method for Obtaining Hydrostatic Design Basis
Combining values from the two systems may result in non-
forThermoplasticPipeMaterialsorPressureDesignBasis
conformance with the standard.
for Thermoplastic Pipe Products
D4218 Test Method for Determination of Carbon Black
NOTE 1—Metric sized (SI units) pipe should only be joined with
corresponding metric sized fittings, and inch sized pipe should only be
Content in Polyethylene Compounds By the Muffle-
joinedwithcorrespondinginchsizedfittings.Inchsizedfittingsshouldnot
Furnace Technique
be used for metric sized pipe, and metric sized fittings should not be used
F412 Terminology Relating to Plastic Piping Systems
for inch sized pipe.
F876 SpecificationforCrosslinkedPolyethylene(PEX)Tub-
1.4 This standard does not purport to address all of the
ing
safety concerns, if any, associated with its use. It is the F1041 Guide for Squeeze-Off of Polyolefin Gas Pressure
responsibility of the user of this standard to establish appro- Pipe and Tubing
F1055 Specification for Electrofusion Type Polyethylene
priate safety and health practices and determine the applica-
Fittings for Outside Diameter Controlled Polyethylene
bility of regulatory limitations prior to use.
and Crosslinked Polyethylene (PEX) Pipe and Tubing
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 Nov. 1, 2014. Published December 2014. 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–14. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F2968–14A. 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 Conshohocken, PA 19428-2959. United States
1
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F2968/F2968M−14a
F1563 Specification for Tools to Squeeze-off Polyethylene crosslinked polyethyl
...
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 − 14 F2968/F2968M − 14a An American National Standard
Standard Specification for
Black Crosslinked Polyethylene (PEX) Pipe, Fittings and
1
Joints 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 Scope*
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 and gas transmission pressure piping applications.
1.2 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.
1.3 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 non-conformance with the standard.
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.
1.4 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.
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
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2290 Test Method for Apparent Hoop Tensile Strength of Plastic or Reinforced Plastic Pipe
D2765 Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for
Thermoplastic Pipe Products
D4218 Test Method for Determination of Carbon Black Content in Polyethylene Compounds By the Muffle-Furnace Technique
F412 Terminology Relating to Plastic Piping Systems
F876 Specification for Crosslinked Polyethylene (PEX) Tubing
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 April 15, 2014Nov. 1, 2014. Published June 2014December 2014. Originally approved in 2014. Last previous edition approved in 2014 as
D2968/D2968M–14. DOI: 10.1520/F2968–14.10.1520/F2968–14A.
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 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 Conshohocken, PA 19428-2959. United State
...
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