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ASTM F3288/F3288M-20

(Specification)

Standard Specification for MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene (PEX) Pressure Pipe

Standard Specification for MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene (PEX) Pressure Pipe

SCOPE
1.1 This specification covers crosslinked polyethylene (PEX) pipe that is outside diameter controlled in metric pipe sizes (DN 16 to 1000) and inch pipe sizes (NPS 3 to 54), and pressure rated (see Appendix X1) using the MRS rating system. This Specification is intended for PEX pipe made by various processes, as long as the PEX pipe made by that process meets all the requirements of this Specification. Included are requirements and test methods for material, workmanship, UV protection, dimensions, hydrostatic sustained pressure, environmental stress cracking, stabilizer functionality, bent-pipe hydrostatic pressure, oxidative stability in potable chlorinated water, minimum operating temperature, degree of crosslinking, and hydrostatic burst pressure. Requirements for pipe markings are also given. The pipe covered by this specification is intended for pressure piping applications such as, industrial and general-purpose pipelines, potable water pipelines, fire – extinguishing pipelines, oil and gas producing applications to convey fluids such as oil, dry or wet gas, gas gathering, multiphase fluids, and non-potable oilfield water, and chemical pipelines. It is not intended for municipal natural gas distribution.  
1.2 This specification also includes requirements for qualifying joints made using polyethylene electrofusion fittings and PEX pipe. Installation considerations are in X3.2.
Note 1: NPS fittings should not be used for DN sized pipe, and DN sized fittings should not be used for NPS pipe.  
1.3 The text of this specification references notes, footnotes, and appendixes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) should not be considered as requirements of the specification.  
1.4 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4.1 For consistency with ISO 9080, MRS values are only in MPa and degrees Centigrade for conversion to the pipe material designation code (for example PEX pipe with an MRS of 8 MPa is called a PEX 80.  
1.5 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.  
1.6 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.

General Information

Status
Published
Publication Date
31-Jul-2020
ICS
23.040.20 - Plastics pipes
Technical Committee
F17 - Plastic Piping Systems
Drafting Committee
F17.26 - Olefin Based Pipe
Current Stage
Ref Project

Relations

Refers
ASTM D1603-20 - Standard Test Method for Carbon Black Content in Olefin Plastics
Effective Date
01-Feb-2020
Refers
ASTM D4218-20 - Standard Test Method for Determination of Carbon Black Content in Polyethylene Compounds by the Muffle-Furnace Technique
Effective Date
01-Feb-2020
Refers
ASTM F412-20 - Standard Terminology Relating to Plastic Piping Systems
Effective Date
01-Apr-2020

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ASTM F3288/F3288M-20 - Standard Specification for MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene (PEX) Pressure PipeASTM F3288/F3288M-20 - Standard Specification for MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene (PEX) Pressure Pipe
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ASTM F3288/F3288M-20 - Standard Specification for MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene (PEX) Pressure Pipe
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Standards Content (Sample)

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:F3288/F3288M −20 An American National Standard
Standard Specification for
MRS-Rated Metric- and Inch-sized Crosslinked Polyethylene
1
(PEX) Pressure Pipe
ThisstandardisissuedunderthefixeddesignationF3288/F3288M;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 system shall be used independently of the other, and values
from the two systems shall not be combined.
1.1 This specification covers crosslinked polyethylene
1.4.1 For consistency with ISO 9080, MRS values are only
(PEX) pipe that is outside diameter controlled in metric pipe
in MPa and degrees Centigrade for conversion to the pipe
sizes (DN 16 to 1000) and inch pipe sizes (NPS 3 to 54), and
materialdesignationcode(forexamplePEXpipewithanMRS
pressure rated (see Appendix X1) using the MRS rating
of 8 MPa is called a PEX 80.
system. This Specification is intended for PEX pipe made by
1.5 This standard does not purport to address all of the
various processes, as long as the PEX pipe made by that
safety concerns, if any, associated with its use. It is the
process meets all the requirements of this Specification. In-
responsibility of the user of this standard to establish appro-
cluded are requirements and test methods for material,
priate safety, health, and environmental practices and deter-
workmanship, UV protection, dimensions, hydrostatic sus-
mine the applicability of regulatory limitations prior to use.
tained pressure, environmental stress cracking, stabilizer
1.6 This international standard was developed in accor-
functionality,bent-pipehydrostaticpressure,oxidativestability
dance with internationally recognized principles on standard-
in potable chlorinated water, minimum operating temperature,
ization established in the Decision on Principles for the
degreeofcrosslinking,andhydrostaticburstpressure.Require-
Development of International Standards, Guides and Recom-
ments for pipe markings are also given. The pipe covered by
mendations issued by the World Trade Organization Technical
this specification is intended for pressure piping applications
Barriers to Trade (TBT) Committee.
suchas,industrialandgeneral-purposepipelines,potablewater
pipelines, fire – extinguishing pipelines, oil and gas producing
2. Referenced Documents
applications to convey fluids such as oil, dry or wet gas, gas
2
gathering, multiphase fluids, and non-potable oilfield water,
2.1 ASTM Standards:
and chemical pipelines. It is not intended for municipal natural
D618 Practice for Conditioning Plastics for Testing
gas distribution.
D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.2 This specification also includes requirements for quali-
D1505 Test Method for Density of Plastics by the Density-
fying joints made using polyethylene electrofusion fittings and
Gradient Technique
PEX pipe. Installation considerations are in X3.2.
D1598 Test Method for Time-to-Failure of Plastic Pipe
NOTE 1—NPS fittings should not be used for DN sized pipe, and DN
Under Constant Internal Pressure
sized fittings should not be used for NPS pipe.
D1599 Test Method for Resistance to Short-Time Hydraulic
1.3 Thetextofthisspecificationreferencesnotes,footnotes,
Pressure of Plastic Pipe, Tubing, and Fittings
and appendixes, which provide explanatory material. These
D1600 TerminologyforAbbreviatedTermsRelatingtoPlas-
notes and footnotes (excluding those in tables and figures)
tics
should not be considered as requirements of the specification.
D1603 Test Method for Carbon Black Content in Olefin
1.4 Units—The values stated in either SI units or inch- Plastics
pound units are to be regarded separately as standard. The D2122 Test Method for Determining Dimensions of Ther-
values stated in each system are not necessarily exact equiva- moplastic Pipe and Fittings
lents; therefore, to ensure conformance with the standard, each D2290 Test Method for Apparent Hoop Tensile Strength of
Plastic or Reinforced Plastic Pipe
1
This specification is under the jurisdiction ofASTM Committee F17 on Plastic
2
Piping Systems and is the direct responsibility of Subcommittee F17.26 on Olefin For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Based Pipe. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Aug. 1, 2020. Published August 2020. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
F3288–20 the ASTM web
...

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1.1 This terminology is a compilation of definitions of technical terms used in the plastic piping industry. Terms that are generally understood or adequately defined in other readily available sources are not included.  
1.2 When a term is used in an ASTM document for which Committee F17 is responsible it is included only when judged, after review, by Subcommittee F17.91 to be a generally usable term.  
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Standard Test Method for Determination of Gel Content of Crosslinked Polyethylene (PEX) Pipes and Tubing

SIGNIFICANCE AND USE
5.1 Many important properties of crosslinked ethylene plastics vary with the gel content. Hence, determination of the gel content provides a basis for controlling production processes and a means of establishing the quality of finished products.  
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SCOPE
1.1 The gel content of pipe and tubing produced from crosslinked polyethylene plastics as described in Specification F876 and other pipe or tubing standards is determined by extracting with solvents such as xylenes. A test method for quantitative determination of gel content is described herein. The method is applicable to PEX pipe and tubing of all densities, including those containing fillers, and provides correction for the inert fillers present in some of those compounds.  
1.2 Continuous extraction (see definition in Section 3) is used in this method to test the gel content of crosslinked polyethylene specimens. Continuous extraction when used for testing gel content has the advantages of decreased cost of testing, increased accuracy and consistency of results, and decreased test time. This is because extraction with a pure solvent is more efficient than extraction with a partially saturated solvent.  
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5.1 This test method is useful to measure the slow crack growth resistance of molded plaques of polyethylene materials at accelerated conditions such as 80 °C, 2.4 MPa stress, and with a sharp notch.  
5.2 The testing time or time to failure depends on the following test parameters: temperature; stress; notch depth; and specimen geometry. Increasing temperature, stress, and notch depth decrease the time to failure. Material parameters, not controlled by the laboratory, that could impact the test results (time to failure) are: pigment (color or carbon black) and the carrier resin for the pigment, or both. Thus, in reporting the test time or time to failure, all the conditions of the test shall be specified.  
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SCOPE
1.1 This test method determines the resistance of polyethylene materials to slow crack growth under conditions specified within.
Note 1: This test method is known as PENT (Pennsylvania Notch Test) test.  
1.2 The standard test is performed at 80 °C and at 2.4 MPa, but it shall be acceptable to conduct tests at a temperature below 80 °C and with other stresses low enough to preclude ductile failure and thereby eventually induce brittle type of failure. The standard test is conducted in an air environment; however, it shall be acceptable to immerse test specimens in an alternate environment such as water or a water/detergent solution, or other liquid or a different environment such as an inert gas to evaluate slow crack growth performance in different environments. Generally, polyethylenes will ultimately fail in a brittle manner by slow crack growth at 80 °C if the stress is at or below 2.4 MPa
Note 2: When testing in environments other than air, it is recommended to consider maintaining the efficacy of the test media (for example, a detergent solution) to minimize any effect of aging.  
1.3 The test method is for specimens cut from compression molded plaques.2 See Appendix X1 for information relating to specimens from pipe.  
1.4 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.  
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1.1 This specification covers requirements and test methods for material dimensions and tolerances, hydrostatic burst strength, chemical resistance, and impact resistance of PEX pipe and tubing for use in fuel gas mains and services for direct burial applications.  
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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 specification covers the requirements for smooth-wall perforated and nonperforated poly(vinyl chloride) (PVC) plastic pipe and couplings for use in subsurface drainage systems of highways, airports, and similar applications. Two classes (or pipe stiffness) are included and designated as PS 28 and PS 46. The pipe stiffness, impact resistance, pipe flattening, and solvent cement joint tightness shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers the requirements for smooth-wall perforated and nonperforated poly(vinyl chloride) (PVC) plastic pipe and couplings for use in subsurface drainage systems of highways, airports, and similar applications in nominal sizes of 4, 6, and 8 in. and in pipe stiffnesses (PS) that are designated as Type PS 28 and Type PS 46 in accordance with its minimum pipe stiffness.  
1.2 Molded fittings for use with highway underdrain pipe are in accordance with Specification D3034. For convenience, some of these fittings are reproduced in Annex A1.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
Note 1: Type PS 28 and Type PS 46 indicate “pipe stiffness” of 28 and 46, respectively, as outlined in 11.1.
Note 2: Pipe and fittings should be installed in accordance with Practice D2321, or applicable state or local specifications.  
1.4 Units—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 safety hazards caveat pertains only to the test methods portion, Section 11, 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.  
1.6 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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