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ASTM F2818-10(2023)

(Specification)

Standard Specification for Specification for Crosslinked Polyethylene (PEX) Material Gas Pressure Pipe and Tubing

Standard Specification for Specification for Crosslinked Polyethylene (PEX) Material Gas Pressure Pipe and Tubing

ABSTRACT
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. Requirements cover workmanship, pipe and tubing dimensions and tolerances, chemical resistance, sustained pressure, elevated temperature, thermal stability, slow crack growth resistance, minimum hydrostatic burst pressure/apparent tensile strength (quick burst), apparent tensile strength at yield, squeeze-off, thermal stability, slow crack growth resistance, and joints.
SCOPE
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.  
1.2 The text of this specification references notes and footnotes 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.

General Information

Status
Published
Publication Date
30-Jun-2023
ICS
23.040.20 - Plastics pipes
Technical Committee
F17 - Plastic Piping Systems
Drafting Committee
F17.60 - Gas
Current Stage
Ref Project

Relations

Refers
ASTM F412-20 - Standard Terminology Relating to Plastic Piping Systems
Effective Date
01-Apr-2020
Refers
ASTM F1041-20 - Standard Guide for Squeeze-Off of Polyolefin Gas Pressure Pipe and Tubing
Effective Date
01-Aug-2020

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ASTM F2818-10(2023) - Standard Specification for Specification for Crosslinked Polyethylene (PEX) Material Gas Pressure Pipe and TubingASTM F2818-10(2023) - Standard Specification for Specification for Crosslinked Polyethylene (PEX) Material Gas Pressure Pipe and Tubing
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ASTM F2818-10(2023) - Standard Specification for Specification for Crosslinked Polyethylene (PEX) Material Gas Pressure Pipe and Tubing
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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: F2818 − 10 (Reapproved 2023) An American National Standard
Standard Specification for
Specification for Crosslinked Polyethylene (PEX) Material
1
Gas Pressure Pipe and Tubing
This standard is issued under the fixed designation F2818; 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 D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers requirements and test methods
D1505 Test Method for Density of Plastics by the Density-
for material dimensions and tolerances, hydrostatic burst
Gradient Technique
strength, chemical resistance, and impact resistance of PEX
D1598 Test Method for Time-to-Failure of Plastic Pipe
pipe and tubing for use in fuel gas mains and services for direct
Under Constant Internal Pressure
burial applications.
D1599 Test Method for Resistance to Short-Time Hydraulic
1.2 The text of this specification references notes and
Pressure of Plastic Pipe, Tubing, and Fittings
footnotes provide explanatory material. These notes and foot-
D1600 Terminology for Abbreviated Terms Relating to Plas-
notes (excluding those in tables and figures) shall not be
tics
considered as requirements of the specification. 3
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
D2122 Test Method for Determining Dimensions of Ther-
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical moplastic Pipe and Fittings
D2290 Test Method for Apparent Hoop Tensile Strength of
conversions to SI units that are provided for information only
and are not considered standard. Plastic or Reinforced Plastic Pipe
D2513 Specification for Polyethylene (PE) Gas Pressure
1.4 This standard does not purport to address all of the
Pipe, Tubing, and Fittings
safety concerns, if any, associated with its use. It is the
D2765 Test Methods for Determination of Gel Content and
responsibility of the user of this standard to establish appro-
Swell Ratio of Crosslinked Ethylene Plastics
priate safety, health, and environmental practices and deter-
D2837 Test Method for Obtaining Hydrostatic Design Basis
mine the applicability of regulatory limitations prior to use.
for Thermoplastic Pipe Materials or Pressure Design Basis
1.5 This international standard was developed in accor-
for Thermoplastic Pipe Products
dance with internationally recognized principles on standard-
D3350 Specification for Polyethylene Plastics Pipe and Fit-
ization established in the Decision on Principles for the
tings Materials
Development of International Standards, Guides and Recom-
D4883 Test Method for Density of Polyethylene by the
mendations issued by the World Trade Organization Technical
Ultrasound Technique
Barriers to Trade (TBT) Committee.
F412 Terminology Relating to Plastic Piping Systems
F1473 Test Method for Notch Tensile Test to Measure the
2. Referenced Documents
Resistance to Slow Crack Growth of Polyethylene Pipes
2
2.1 ASTM Standards:
and Resins
D543 Practices for Evaluating the Resistance of Plastics to
F1563 Specification for Tools to Squeeze-off Polyethylene
Chemical Reagents
(PE) Gas Pipe or Tubing
D618 Practice for Conditioning Plastics for Testing
F1041 Guide for Squeeze-Off of Polyolefin Gas Pressure
D638 Test Method for Tensile Properties of Plastics
Pipe and Tubing
2.2 Other Standards and Publications:
4
B31.8 Gas Transmission and Distribution Piping Systems
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic
PPI-TR3 Policies and Procedures for Developing Hydro-
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
static Design Basis (HDB), Pressure Design Basis (PDB),
Current edition approved July 1, 2023. Published July 2023. Originally published
in 2010. Last previous edition approved in 2019 as F2818 – 10 (2019).
DOI:10.1520/F2818-10R23.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.astm.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
...

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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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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.  
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Annex  
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In-Plant Quality Control for PVC materials
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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.  
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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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