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ASTM F2968/F2968M-14

(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 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.

General Information

Status
Historical
Publication Date
14-Apr-2014
ICS
23.040.20 - Plastics pipes
23.100.40 - Piping and couplings
91.140.40 - Gas supply systems
Technical Committee
F17 - Plastic Piping Systems
Drafting Committee
F17.60 - Gas
Current Stage
Ref Project

Relations

Replaced By
ASTM F2968/F2968M-14a - Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution Applications
Effective Date
01-Nov-2014
Referred By
ASTM F3373-21 - Standard Specification for Polyethylene (PE) Electrofusion Fittings for Outside Diameter Controlled Crosslinked Polyethylene (PEX) Pipe
Effective Date
15-Apr-2014
Referred By
ASTM F412-23 - Standard Terminology Relating to Plastic Piping Systems
Effective Date
15-Apr-2014
Referred By
ASTM F2829/F2829M-21 - Standard Specification for Metric- and Inch-Sized Fittings for Crosslinked Polyethylene (PEX) Pipe
Effective Date
15-Apr-2014

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ASTM F2968/F2968M-14 - Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution ApplicationsASTM F2968/F2968M-14 - Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution Applications
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ASTM F2968/F2968M-14 - Standard Specification for Black Crosslinked Polyethylene (PEX) Pipe, Fittings and Joints For Gas Distribution Applications
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F2968/F2968M −14 AnAmerican 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
1.1 This specification covers outside diameter controlled, 2.1 ASTM Standards:
black metric-sized and IPS-sized crosslinked polyethylene D543 Practices for Evaluating the Resistance of Plastics to
(PEX) pipe, fittings and joints, made in pipe dimension ratios Chemical Reagents
ranging from 6 to 17, and pressure rated for gas distribution. D618 Practice for Conditioning Plastics for Testing
Included are requirements and test methods for material, D792 Test Methods for Density and Specific Gravity (Rela-
workmanship, dimensions, burst pressure, hydrostatic sus- tive Density) of Plastics by Displacement
tained pressure, stabilizer functionality, bent-pipe hydrostatic D1505 Test Method for Density of Plastics by the Density-
pressure, degree of crosslinking, chemical resistance, and Gradient Technique
squeeze-off. Requirements for pipe and fittings markings are D1598 Test Method for Time-to-Failure of Plastic Pipe
also given. The pipe, fittings and joints covered by this Under Constant Internal Pressure
specification are intended for buried gas distribution pressure D1599 Test Method for Resistance to Short-Time Hydraulic
piping applications. Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology forAbbreviatedTerms Relating to Plas-
1.2 The text of this specification references notes, footnotes,
tics
and appendixes, which provide explanatory material. These
D1603 Test Method for Carbon Black Content in Olefin
notesandfootnotes(excludingthoseintablesandfigures)shall
Plastics
not be considered as requirements of the specification.
D2122 Test Method for Determining Dimensions of Ther-
1.3 Units—The values stated in either SI units or inch-
moplastic Pipe and Fittings
pound units are to be regarded separately as standard. The
D2290 Test Method for Apparent Hoop Tensile Strength of
values stated in each system may not be exact equivalents;
Plastic or Reinforced Plastic Pipe
therefore,eachsystemshallbeusedindependentlyoftheother.
D2765 Test Methods for Determination of Gel Content and
Combining values from the two systems may result in non-
Swell Ratio of Crosslinked Ethylene Plastics
conformance with the standard.
D2837 Test Method for Obtaining Hydrostatic Design Basis
forThermoplasticPipeMaterialsorPressureDesignBasis
NOTE 1—Metric sized (SI units) pipe should only be joined with
corresponding metric sized fittings, and inch sized pipe should only be
for Thermoplastic Pipe Products
joinedwithcorrespondinginchsizedfittings.Inchsizedfittingsshouldnot
D4218 Test Method for Determination of Carbon Black
be used for metric sized pipe, and metric sized fittings should not be used
Content in Polyethylene Compounds By the Muffle-
for inch sized pipe.
Furnace Technique
1.4 This standard does not purport to address all of the
F412 Terminology Relating to Plastic Piping Systems
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
priate safety and health practices and determine the applica-
F1055 Specification for Electrofusion Type Polyethylene
bility of regulatory limitations prior to use.
Fittings for Outside Diameter Controlled Polyethylene
1 2
This specification is under the jurisdiction ofASTM Committee F17 on Plastic For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved April 15, 2014. Published June 2014. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
F2968–14. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2968/F2968M−14
and Crosslinked Polyethylene (PEX) Pipe and Tubing crosslinked polyethylene (PEX) followed by fourArabic digits
F1563 Specification for Tools to Squeeze-off Polyethylene as shown in Table 1, and as defined in Terminology F412 for
(PE) Gas Pipe or Tubing PEX pipe materials.
F1948 Specification for Metallic Mechanical Fittings for
4. Pipe Classification
Use on Outside Di
...

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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.
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