ASTM F2023-21
(Test Method)Standard Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Pipe, Tubing and Systems to Hot Chlorinated Water
Standard Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Pipe, Tubing and Systems to Hot Chlorinated Water
SIGNIFICANCE AND USE
5.1 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 pipe or 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) pipe or tubing produced in accordance with PEX specifications, such as Specification F876 or Specification F2788/F2788M 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 pipe or 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 pipe or tubing. When testing PEX pipe or 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 pipe or 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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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...
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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: F2023 − 21
Standard Test Method for
Evaluating the Oxidative Resistance of Crosslinked
Polyethylene (PEX) Pipe, Tubing and Systems to Hot
1
Chlorinated 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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
evaluate pipes manufactured from polybutylene (PB), polyethylene (PE),
1. Scope*
polypropylene (PP), multilayer (polymer-metal composite), copper, and
1.1 This test method describes the general requirements for
stainless steel.
evaluating the long-term, chlorinated water, oxidative resis-
1.3 ThistestmethodisapplicabletoPEXpipeortubingand
tance of cross-linked polyethylene (PEX) pipe or tubing
systems used for transport of potable water containing free-
produced in accordance with PEX specifications, such as
chlorine for disinfecting purposes. The oxidizing potential of
Specification F876 or Specification F2788/F2788M by expo-
thetest-fluidspecifiedinthistestmethodexceedsthattypically
sure to hot, chlorinated water. This test method outlines the
found in potable water systems across the United States.
requirementsofapressurizedflow-throughtestsystem,typical
1.4 The values stated in inch-pound units are to be regarded
test pressures, test-fluid characteristics, failure type, and data
as standard. The values given in parentheses are mathematical
analysis.
conversions to SI units that are provided for information only
NOTE 1—Other known disinfecting systems (chlorine dioxide, ozone,
and are not considered standard.
and chloramines) are also used for protection of potable water. Free-
chlorine is the most common disinfectant in use today. A PPI research 1.5 The following precautionary caveat pertains only to the
projectexaminedtherelativeaggressivenessoffreechlorineandchloram-
test method portion, Section 12, of this specification. This
ines on PEX pipes, both at the same 4.0 ppm concentration and the same
standard does not purport to address all of the safety concerns,
test temperatures. The results of the testing showed pipe failure times
if any, associated with its use. It is the responsibility of the user
approximately 40% longer when tested with chloramines compared to
of this standard to establish appropriate safety, health, and
testing with free chlorine, at the tested conditions. Based on these results,
thedatasuggeststhatchloraminesarelessaggressivethanfreechlorineto environmental practices and determine the applicability of
PEX pipes.
regulatory limitations prior to use.
1.2 Guidelines and requirements for test temperatures, test 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
hoop stresses, and other test criteria have been established by
prior testing of PEX pipe or tubing produced by the three most ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
common commercial methods of cross-linking: silane,
peroxide,andelectron-beam(seeNote2).Otherrelatedsystem mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
components that typically appear in a PEX hot-and-cold water
distribution system can be evaluated with the PEX pipe or
tubing. When testing PEX pipe or tubing and fittings as a 2. Referenced Documents
system, it is recommended that the anticipated end-use fitting 2
2.1 ASTM Standards:
type(s) and material(s) be included in the test circuit since it is
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
known that some fitting types and materials can impact failure
tics
times. Specimens used shall be representative of the piping
D2122Test Method for Determining Dimensions of Ther-
product(s) and material(s) under investigation.
moplastic Pipe and Fittings
F412Terminology Relating to Plastic Piping Systems
NOTE 2—The procedures described in this test method (with some
modifications of test temperatures or stresses, or both) have been used to
F876SpecificationforCrosslinkedPolyethylene(PEX)Tub-
ing
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
2
Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 15, 2021. Published January 2022. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2000. Last previ
...
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: F2023 − 15 F2023 − 21
Standard Test Method for
Evaluating the Oxidative Resistance of Crosslinked
Polyethylene (PEX) Pipe, Tubing and Systems to Hot
1
Chlorinated 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) pipe or tubing produced in accordance with PEX specifications, such as Specification F876 or
Specification F2788/F2788M 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 pipe or 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 pipe or tubing. When testing PEX pipe or 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 pipe or 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 standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 Methods.
Current edition approved Dec. 1, 2015Dec. 15, 2021. Published January 2016January 2022. Originally approved in 2000. Last previous edition approved in 20132015 as
F2023 – 13.F2023 – 15. DOI: 10.1520/F2023-15.10.1520/F2023-21.
*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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F2023 − 21
FIG. 1 Pictorial Illustration of Failure Types
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 safety, health, and healthenvironmental 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
...
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