ASTM F3253-23
(Specification)Standard Specification for Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier for Hot- and Cold-Water Hydronic Distribution Systems
Standard Specification for Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier for Hot- and Cold-Water Hydronic Distribution Systems
ABSTRACT
This specification covers the requirements, test methods, and markings for crosslinked polyethylene (PEX) tubing with a polymeric oxygen barrier layer, made in one standard dimension ratio (SDR 9), and distribution system components intended for hydronic heating and cooling applications up to and including a maximum working temperature of 200°F (93°C). Components are comprised of tubing, fittings, valves, and manifolds that are intended for use in residential and commercial hydronic heating and cooling systems. Tubing made to this specification incorporates a single outer or middle wall oxygen barrier layer designed to inhibit the transmission or permeation of oxygen through the tubing wall. The requirements and test methods cover materials, workmanship, tubing dimensions and tolerances, burst pressure, sustained pressure, excessive temperature and pressure, thermo-cycling, bent tube, oxidative resistance, layer adhesion, UV resistance, oxygen permeation, and fitting pullout strength tests.
This specification does not apply to potable water applications.
SCOPE
1.1 This specification covers requirements, test methods, and marking requirements for crosslinked polyethylene (PEX) tubing with a polymeric oxygen barrier layer, made in one standard dimension ratio (SDR 9), and distribution system components intended for hydronic heating and cooling applications up to and including a maximum working temperature of 200 °F (93 °C).
1.1.1 Components are comprised of tubing, fittings, valves, and manifolds. Tubing made to this specification incorporates a single outer or middle wall oxygen barrier layer intended for inhibiting the transmission or permeation of oxygen through the tubing wall. Requirements and test methods are included for materials, workmanship, tubing dimensions and tolerances, burst pressure, sustained pressure, excessive temperature and pressure, thermo-cycling, bent tube, oxidative resistance, layer adhesion, UV resistance, oxygen permeation, and fitting pull-out strength tests. The components covered by this specification are intended for use in residential and commercial hydronic heating and cooling systems. Requirements for potable water applications are outside the scope of this specification.
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 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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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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.
Designation: F3253 − 23 An American National Standard
Standard Specification for
Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier
1
for Hot- and Cold-Water Hydronic Distribution Systems
This standard is issued under the fixed designation F3253; 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* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers requirements, test methods,
mendations issued by the World Trade Organization Technical
and marking requirements for crosslinked polyethylene (PEX)
Barriers to Trade (TBT) Committee.
tubing with a polymeric oxygen barrier layer, made in one
standard dimension ratio (SDR 9), and distribution system
2. Referenced Documents
components intended for hydronic heating and cooling appli-
2
2.1 ASTM Standards:
cations up to and including a maximum working temperature
D618 Practice for Conditioning Plastics for Testing
of 200 °F (93 °C).
D792 Test Methods for Density and Specific Gravity (Rela-
1.1.1 Components are comprised of tubing, fittings, valves,
tive Density) of Plastics by Displacement
and manifolds. Tubing made to this specification incorporates
D1505 Test Method for Density of Plastics by the Density-
a single outer or middle wall oxygen barrier layer intended for
Gradient Technique
inhibiting the transmission or permeation of oxygen through
D1598 Test Method for Time-to-Failure of Plastic Pipe
the tubing wall. Requirements and test methods are included
Under Constant Internal Pressure
for materials, workmanship, tubing dimensions and tolerances,
D1599 Test Method for Resistance to Short-Time Hydraulic
burst pressure, sustained pressure, excessive temperature and
Pressure of Plastic Pipe, Tubing, and Fittings
pressure, thermo-cycling, bent tube, oxidative resistance, layer
D1600 Terminology for Abbreviated Terms Relating to Plas-
adhesion, UV resistance, oxygen permeation, and fitting pull-
tics
out strength tests. The components covered by this specifica-
D2122 Test Method for Determining Dimensions of Ther-
tion are intended for use in residential and commercial hy-
moplastic Pipe and Fittings
dronic heating and cooling systems. Requirements for potable
D2749 Symbols for Dimensions of Plastic Pipe Fittings
water applications are outside the scope of this specification.
D2765 Test Methods for Determination of Gel Content and
1.2 The text of this specification references notes, footnotes,
Swell Ratio of Crosslinked Ethylene Plastics
and appendixes which provide explanatory material. These
D2837 Test Method for Obtaining Hydrostatic Design Basis
notes and footnotes (excluding those in tables and figures) shall
for Thermoplastic Pipe Materials or Pressure Design Basis
not be considered as requirements of the specification.
for Thermoplastic Pipe Products
1.3 The values stated in inch-pound units are to be regarded
F412 Terminology Relating to Plastic Piping Systems
as standard. The values given in parentheses are mathematical
F876 Specification for Crosslinked Polyethylene (PEX) Tub-
conversions to SI units that are provided for information only
ing
and are not considered standard.
F877 Specification for Crosslinked Polyethylene (PEX) Hot-
and Cold-Water Distribution Systems
1.4 This standard does not purport to address all of the
F1281 Specification for Crosslinked Polyethylene/
safety concerns, if any, associated with its use. It is the
Aluminum/Crosslinked Polyethylene (PEX-AL-PEX)
responsibility of the user of this standard to establish appro-
Pressure Pipe
priate safety, health, and environmental practices and deter-
F1588 Test Method for Constant Tensile Load Joint Test
mine the applicability of regulatory limitations prior to use.
(CTLJT)
1.5 This international standard was developed in accor-
F1960 Specification for Cold Expansion Fittings with PEX
dance with internationally recognized principles on standard-
Reinforcing Rings for Use with Cross-linked Polyethylene
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic
2
Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2023. Published April 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2017. Last previous edition approved in 2019 as F3253
...
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: F3253 − 19 F3253 − 23 An American National Standard
Standard Specification for
Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier
1
for Hot- and Cold-Water Hydronic Distribution Systems
This standard is issued under the fixed designation F3253; 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 requirements, test methods, and marking requirements for crosslinked polyethylene (PEX) tubing
with a polymeric oxygen barrier layer, made in one standard dimension ratio (SDR 9), and distribution system components
intended for hydronic heating and cooling applications up to and including a maximum working temperature of 200 °F (93 °C).
1.1.1 Components are comprised of tubing, fittings, valves, and manifolds. Tubing made to this specification incorporates a single
outer or middle wall oxygen barrier layer intended for inhibiting the transmission or permeation of oxygen through the tubing wall.
Requirements and test methods are included for materials, workmanship, tubing dimensions and tolerances, burst pressure,
sustained pressure, excessive temperature and pressure, thermo-cycling, bent tube, oxidative resistance, layer adhesion, UV
resistance, oxygen permeation, and fitting pull-out strength tests. The components covered by this specification are intended for
use in residential and commercial hydronic heating and cooling systems. Requirements for potable water applications are outside
the scope of this specification.
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 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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:
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
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water.
Current edition approved Nov. 1, 2019Feb. 1, 2023. Published November 2019April 2023. Originally approved in 2017. Last previous edition approved in 20182019 as
F3253–18. DOI: 10.1520/F3253–19–19. DOI: 10.1520/F3253–23
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 States
1
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F3253 − 23
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
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2749 Symbols for Dimensions of Plastic Pipe Fittings
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 Pressur
...
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