ASTM F2023-09
(Test Method)Standard Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Tubing and Systems to Hot Chlorinated Water
Standard Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Tubing and Systems to Hot Chlorinated Water
SIGNIFICANCE AND USE
Environment or oxidative time-to-fail data derived from this test method, analyzed in accordance with Section 13, are suitable for extrapolation to typical end-use temperatures and hoop stresses. The extrapolated value(s) provides a relative indication of the resistance of the tested PEX tubing or system to the oxidative effects of hot, chlorinated water for conditions equivalent to those conditions under which the test data were obtained. The performance of a material or piping product under actual conditions of installation and use is dependent upon a number of factors including installation methods, use patterns, water quality, nature and magnitude of localized stresses, and other variables of an actual, operating hot-and-cold water distribution system that are not addressed in this test method. As such, the extrapolated values do not constitute a representation that a PEX tube or system with a given extrapolated time-to-failure value will perform for that period of time under actual use conditions.
SCOPE
1.1 This test method describes the general requirements for evaluating the long-term, chlorinated water, oxidative resistance of cross-linked polyethylene (PEX) tubing produced in accordance with Specification F876 or PEX tubing/fitting systems in accordance with Specification F877 used in hot-and-cold water distribution systems by exposure to hot, chlorinated water. This test method outlines the requirements of a pressurized flow-through test system, typical test pressures, test-fluid characteristics, failure type, and data analysis.
Note 1—Other known disinfecting systems (chlorine dioxide, ozone, and chloramines) are also used for protection of potable water. Free-chlorine is the most common disinfectant in use today. A PPI research project examined the relative aggressiveness of free chlorine and chloramines on PEX pipes, both at the same 4.0 ppm concentration and the same test temperatures. The results of the testing showed pipe failure times approximately 40% longer when tested with chloramines compared to testing with free chlorine, at the tested conditions. Based on these results, the data suggests that chloramines are less aggressive than free chlorine to PEX pipes.
1.2 Guidelines and requirements for test temperatures, test hoop stresses, and other test criteria have been established by prior testing of PEX tubing produced by the three most common commercial methods of cross-linking: silane, peroxide, and electron-beam (see Note 2). Other related system components that typically appear in a PEX hot-and-cold water distribution system can be evaluated with the PEX tubing. When testing PEX tubing and fittings as a system, it is recommended that the anticipated end-use fitting type(s) and material(s) be included in the test circuit since it is known that some fitting types and materials can impact failure times. Specimens used shall be representative of the piping product(s) and material(s) under investigation.
Note 2—The procedures described in this test method (with some modifications of test temperatures or stresses, or both) have been used to evaluate pipes manufactured from polybutylene (PB), polyethylene (PE), polypropylene (PP), multilayer (polymer-metal composite), copper, and stainless steel.
1.3 This test method is applicable to PEX tubing and systems used for transport of potable water containing free-chlorine for disinfecting purposes. The oxidizing potential of the test-fluid specified in this test method exceeds that typically found in potable water systems across the United States.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information purposes.
1.5 The following precautionary caveat pertains only to the test method portion, Section 12, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsi...
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An American National Standard
Designation:F2023–09
Standard Test Method for
Evaluating the Oxidative Resistance of Crosslinked
Polyethylene (PEX) Tubing and Systems to Hot Chlorinated
1
Water
This standard is issued under the fixed designation F2023; 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.
modifications of test temperatures or stresses, or both) have been used to
1. Scope
evaluate pipes manufactured from polybutylene (PB), polyethylene (PE),
1.1 This test method describes the general requirements for
polypropylene (PP), multilayer (polymer-metal composite), copper, and
evaluating the long-term, chlorinated water, oxidative resis-
stainless steel.
tance of cross-linked polyethylene (PEX) tubing produced in
1.3 This test method is applicable to PEX tubing and
accordance with Specification F876 or PEX tubing/fitting
systems used for transport of potable water containing free-
systems in accordance with Specification F877 used in hot-
chlorine for disinfecting purposes. The oxidizing potential of
and-cold water distribution systems by exposure to hot, chlo-
thetest-fluidspecifiedinthistestmethodexceedsthattypically
rinated water. This test method outlines the requirements of a
found in potable water systems across the United States.
pressurized flow-through test system, typical test pressures,
1.4 The values stated in inch-pound units are to be regarded
test-fluid characteristics, failure type, and data analysis.
as the standard. The values given in parentheses are for
NOTE 1—Other known disinfecting systems (chlorine dioxide, ozone,
information purposes.
and chloramines) are also used for protection of potable water. Free-
1.5 The following precautionary caveat pertains only to the
chlorine is the most common disinfectant in use today. A PPI research
test method portion, Section 12, of this specification. This
projectexaminedtherelativeaggressivenessoffreechlorineandchloram-
standard does not purport to address all of the safety concerns,
ines on PEX pipes, both at the same 4.0 ppm concentration and the same
if any, associated with its use. It is the responsibility of the user
test temperatures. The results of the testing showed pipe failure times
of this standard to establish appropriate safety and health
approximately 40% longer when tested with chloramines compared to
testing with free chlorine, at the tested conditions. Based on these results, practices and determine the applicability of regulatory limita-
the data suggests that chloramines are less aggressive than free chlorine to
tions prior to use.
PEX pipes.
2. Referenced Documents
1.2 Guidelines and requirements for test temperatures, test
2
2.1 ASTM Standards:
hoop stresses, and other test criteria have been established by
prior testing of PEX tubing produced by the three most D1600 Terminology for Abbreviated Terms Relating to
Plastics
common commercial methods of cross-linking: silane, perox-
ide, and electron-beam (see Note 2). Other related system D2122 Test Method for Determining Dimensions of Ther-
moplastic Pipe and Fittings
components that typically appear in a PEX hot-and-cold water
distribution system can be evaluated with the PEX tubing. F412 Terminology Relating to Plastic Piping Systems
F876 Specification for Crosslinked Polyethylene (PEX)
When testing PEX tubing and fittings as a system, it is
recommended that the anticipated end-use fitting type(s) and Tubing
F877 Specification for Crosslinked Polyethylene (PEX)
material(s) be included in the test circuit since it is known that
some fitting types and materials can impact failure times. Plastic Hot- and Cold-Water Distribution Systems
F948 Test Method for Time-to-Failure of Plastic Piping
Specimensusedshallberepresentativeofthepipingproduct(s)
and material(s) under investigation. Systems and Components Under Constant Internal Pres-
sure With Flow
NOTE 2—The procedures described in this test method (with some
2.2 ISO Standards:
ISO 9080 Thermoplastic Pipe for Transport of Fluids—
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test
2
Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2009. Published January 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2000. Last previous edition approved in 2008 as F2023 – 08. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F2023-09. the ASTM website.
Copyright © ASTM International, 100
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
Designation:F2023–08 Designation:F2023–09
Standard Test Method for
Evaluating the Oxidative Resistance of Crosslinked
Polyethylene (PEX) Tubing and Systems to Hot Chlorinated
1
Water
This standard is issued under the fixed designation F2023; 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 test method describes the general requirements for evaluating the long-term, chlorinated water, oxidative resistance of
cross-linked polyethylene (PEX) tubing produced in accordance with Specification F876 or PEX tubing/fitting systems in
accordancewithSpecificationF877usedinhot-and-coldwaterdistributionsystemsbyexposuretohot,chlorinatedwater.Thistest
method outlines the requirements of a pressurized flow-through test system, typical test pressures, test-fluid characteristics, failure
type, and data analysis.
NOTE 1—Other known disinfecting systems (chlorine dioxide, ozone, and chloramines) are also used for protection of potable water. Free-chlorine is
the most common disinfectant in use today.APPI research project examined the relative aggressiveness of free chlorine and chloramines on PEX pipes,
both at the same 4.0 ppm concentration and the same test temperatures. The results of the testing showed pipe failure times approximately 40% longer
when tested with chloramines compared to testing with free chlorine, at the tested conditions. Based on these results, the data suggests that chloramines
are less aggressive than free chlorine to PEX pipes.
1.2 Guidelines and requirements for test temperatures, test hoop stresses, and other test criteria have been established by prior
testing of PEX tubing produced by the three most common commercial methods of cross-linking: silane, peroxide, and
electron-beam(seeNote2).OtherrelatedsystemcomponentsthattypicallyappearinaPEXhot-and-coldwaterdistributionsystem
can be evaluated with the PEX tubing. When testing PEX tubing and fittings as a system, it is recommended that the anticipated
end-use fitting type(s) and material(s) be included in the test circuit since it is known that some fitting types and materials can
impact failure times. Specimens used shall be representative of the piping product(s) and material(s) under investigation.
NOTE 2—The procedures described in this test method (with some modifications of test temperatures or stresses, or both) have been used to evaluate
pipes manufactured from polybutylene (PB), polyethylene (PE), polypropylene (PP), multilayer (polymer-metal composite), copper, and stainless steel.
1.3 This test method is applicable to PEX tubing and systems used for transport of potable water containing free-chlorine for
disinfecting purposes. The oxidizing potential of the test-fluid specified in this test method exceeds that typically found in potable
water systems across the United States.
1.4 Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformation
purposes.
1.5 The following precautionary caveat pertains only to the test method portion, Section 12, of this specification. 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:
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
F412 Terminology Relating to Plastic Piping Systems
F876 Specification for Crosslinked Polyethylene (PEX) Tubing
F877 Specification for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems
F948 Test Method for Time-to-Failure of Plastic Piping Systems and Components Under Constant Internal Pressure With Flow
2.2 ISO Standards:
1
This test method is under the jurisdiction ofASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test Methods.
Current edition approved MarchDec. 1, 2008.2009. Published April 2008.January 2010. Originally approved in 2000. Last previous edition approved in 20052008 as
F2023 – 058. DOI: 10.1520/F2023-089.
2
For referencedASTM standards, visit theASTM website, ww
...
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