ASTM F1281-24
(Specification)Standard Specification for Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe
Standard Specification for Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe
ABSTRACT
This specification covers coextruded cross linked polyethylene composite pressure pipe with welded aluminum tube reinforcement between the inner and outer layers. The inner and outer cross linked polyethylene layers are bonded to the aluminum tube by a melt adhesive. Included is a system of nomenclature for the cross linked polyethylene-aluminum cross linked polyethylene (PEX-AL-PEX) pipes, the requirements and test methods for materials, the dimensions of the component layers and finished pipe, adhesion tests, and the burst and sustained pressure performance. Also given are the requirements and methods of marking. The pipe covered by this specification is intended for use in potable water distribution systems for residential and commercial applications, water service, underground irrigation systems, and radiant panel heating systems, baseboard, snow- and ice-melt systems, and gases that are compatible with the composite pipe and fittings. It covers only composite pipes incorporating a welded aluminum tube. The PEX-AL-PEX pipes are classified by the outside diameter. The pipe shall be free of visible cracks, holes, foreign inclusions, blisters, and other known injurious defects. The pipe shall be as uniform as practicable in color, opacity, density, and other physical properties.
SCOPE
1.1 This specification covers a coextruded crosslinked polyethylene composite pressure pipe with a welded aluminum tube reinforcement between the inner and outer layers. The inner and outer crosslinked polyethylene layers are bonded to the aluminum tube by a melt adhesive. Included is a system of nomenclature for the crosslinked polyethylene-aluminum-crosslinked polyethylene (PEX-AL-PEX) pipes, the requirements and test methods for materials, the dimensions of the component layers and finished pipe, adhesion tests, and the burst and sustained pressure performance. Also given are the requirements and methods of marking. The pipe covered by this specification is intended for use in potable water distribution systems for residential and commercial applications, water service, building supply lines, underground irrigation systems, and radient panel heating systems, baseboard, snow- and ice-melt systems, and gases that are compatible with the composite pipe and fittings.
Note 1: Piping covered by this specification is not recommended for use in indoor flammable gas applications.
1.2 This specification covers only composite pipes incorporating a welded aluminum tube. Pipes consisting of metallic layers not welded together are outside the scope of this specification.
1.3 Specifications for connectors for use with pipe meeting the requirements of this specification are given in Annex A1.
1.4 This specification excludes polyethylene-aluminum-polyethylene pipes (see Specification F1282).
1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.6 The following precautionary caveat pertains only to the test methods portion, Section 9, 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, health and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 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: F1281 − 24 An American National Standard
Standard Specification for
Crosslinked Polyethylene/Aluminum/Crosslinked
1
Polyethylene (PEX-AL-PEX) Pressure Pipe
This standard is issued under the fixed designation F1281; 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* if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety, health and
1.1 This specification covers a coextruded crosslinked poly-
environmental practices and determine the applicability of
ethylene composite pressure pipe with a welded aluminum tube
regulatory limitations prior to use.
reinforcement between the inner and outer layers. The inner
1.7 This international standard was developed in accor-
and outer crosslinked polyethylene layers are bonded to the
dance with internationally recognized principles on standard-
aluminum tube by a melt adhesive. Included is a system of
ization established in the Decision on Principles for the
nomenclature for the crosslinked polyethylene-aluminum-
Development of International Standards, Guides and Recom-
crosslinked polyethylene (PEX-AL-PEX) pipes, the require-
mendations issued by the World Trade Organization Technical
ments and test methods for materials, the dimensions of the
Barriers to Trade (TBT) Committee.
component layers and finished pipe, adhesion tests, and the
burst and sustained pressure performance. Also given are the
2. Referenced Documents
requirements and methods of marking. The pipe covered by
2
2.1 ASTM Standards:
this specification is intended for use in potable water distribu-
D618 Practice for Conditioning Plastics for Testing
tion systems for residential and commercial applications, water
D883 Terminology Relating to Plastics
service, building supply lines, underground irrigation systems,
D1598 Test Method for Time-to-Failure of Plastic Pipe
and radient panel heating systems, baseboard, snow- and
Under Constant Internal Pressure
ice-melt systems, and gases that are compatible with the
D1599 Test Method for Resistance to Short-Time Hydraulic
composite pipe and fittings.
Pressure of Plastic Pipe, Tubing, and Fittings
NOTE 1— Piping covered by this specification is not recommended for
D1600 Terminology for Abbreviated Terms Relating to Plas-
use in indoor flammable gas applications. 3
tics (Withdrawn 2024)
3
1.2 This specification covers only composite pipes incorpo-
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
rating a welded aluminum tube. Pipes consisting of metallic
D2122 Test Method for Determining Dimensions of Ther-
layers not welded together are outside the scope of this
moplastic Pipe and Fittings
specification.
D2765 Test Methods for Determination of Gel Content and
Swell Ratio of Crosslinked Ethylene Plastics
1.3 Specifications for connectors for use with pipe meeting
D3350 Specification for Polyethylene Plastics Pipe and Fit-
the requirements of this specification are given in Annex A1.
tings Materials
1.4 This specification excludes polyethylene-aluminum-
E8/E8M Test Methods for Tension Testing of Metallic Ma-
polyethylene pipes (see Specification F1282).
terials
1.5 The values stated in SI units are to be regarded as
F412 Terminology Relating to Plastic Piping Systems
standard. The values given in parentheses after SI units are F1282 Specification for Polyethylene/Aluminum/
provided for information only and are not considered standard.
Polyethylene (PE-AL-PE) Composite Pressure Pipe
F1974 Specification for Metal Insert Fittings for
1.6 The following precautionary caveat pertains only to the
Polyethylene/Aluminum/Polyethylene and Crosslinked
test methods portion, Section 9, of this specification: This
Polyethylene/Aluminum/Crosslinked Polyethylene Com-
standard does not purport to address all of the safety concerns,
posite Pressure Pipe
1 2
This specification is under the jurisdiction of ASTM 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 F17.11 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Composite. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Feb. 1, 2024. Published February 2024. Originally the ASTM website.
3
approved in 1990. Last previous edition approved in 2023 as F1281 – 23a. DOI: The last approved version of this historical
...
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: F1281 − 23a F1281 − 24 An American National Standard
Standard Specification for
Crosslinked Polyethylene/Aluminum/Crosslinked
1
Polyethylene (PEX-AL-PEX) Pressure Pipe
This standard is issued under the fixed designation F1281; 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 a coextruded crosslinked polyethylene composite pressure pipe with a welded aluminum tube
reinforcement between the inner and outer layers. The inner and outer crosslinked polyethylene layers are bonded to the aluminum
tube by a melt adhesive. Included is a system of nomenclature for the crosslinked polyethylene-aluminum-crosslinked polyethylene
(PEX-AL-PEX) pipes, the requirements and test methods for materials, the dimensions of the component layers and finished pipe,
adhesion tests, and the burst and sustained pressure performance. Also given are the requirements and methods of marking. The
pipe covered by this specification is intended for use in potable water distribution systems for residential and commercial
applications, water service, building supply lines, underground irrigation systems, and radient panel heating systems, baseboard,
snow- and ice-melt systems, and gases that are compatible with the composite pipe and fittings.
NOTE 1— Piping covered by this specification is not recommended for use in indoor flammable gas applications.
1.2 This specification covers only composite pipes incorporating a welded aluminum tube. Pipes consisting of metallic layers not
welded together are outside the scope of this specification.
1.3 Specifications for connectors for use with pipe meeting the requirements of this specification are given in Annex A1.
1.4 This specification excludes polyethylene-aluminum-polyethylene pipes (see Specification F1282).
1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for
information only and are not considered standard.
1.6 The following precautionary caveat pertains only to the test methods portion, Section 9, 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, health and environmental practices and determine the applicability of regulatory
limitations prior to use.
1.7 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.
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.11 on Composite.
Current edition approved July 1, 2023Feb. 1, 2024. Published July 2023February 2024. Originally approved in 1990. Last previous edition approved in 2023 as
F1281 – 23.F1281 – 23a. DOI: 10.1520/F1281-23A.10.1520/F1281-24.
*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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F1281 − 24
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
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
3
D1600 Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
3
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2765 Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
D3350 Specification for Polyethylene Plastics Pipe and Fittings Materials
E8/E8M Test Methods for Tension Testing of Metallic Materials
F412 Terminology Relating to Plastic Piping Systems
F1282 Specification for Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure Pipe
F1974 Specification for Metal Insert
...
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