ASTM F2769-24

Standard Specification for Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems

ABSTRACT
This specification covers the requirements for polyethylene of raised temperature (PE-RT) plastic hot- and cold-water tubing and distribution systems components made in one standard dimension ratio and intended for specified water service pressures and maximum working temperatures. The components covered here are comprised of tubing, fittings, valves, and manifolds intended for use in residential and commercial, hot and cold, potable water distribution systems. The polyethylene used to make tubing shall be virgin plastic and/or reworked plastic, while fittings shall be made from materials that are generally regarded as corrosion resistant. Sampled specimens shall be tested for conformance with workmanship, dimension (out-of-roundness, outside diameter, and wall thickness), burst pressure, sustained pressure, oxidative stability in potable chlorinated water, thermocycling, bend strength, excessive temperature-pressure capacity, environmental stress cracking, adhesion, and slow crack growth resistance requirements.
SCOPE
1.1 This specification establishes requirements for polyethylene of raised temperature (PE-RT) plastic hot- and cold-water tubing and distribution systems components made in one standard dimension ratio and intended for 100 psig (6.9 bar) water service up to and including a maximum working temperature of 180 °F (82 °C). Components are comprised of tubing, fittings, valves and manifolds. Tubing may incorporate an optional polymeric inner, middle or outer layer. Testing of fittings and PE-RT tubing to the requirements of this standard indicate that these fittings are appropriate for use with PE-RT piping systems. Requirements and test methods are included for materials, workmanship, dimensions and tolerances, burst pressure, sustained pressure, oxidative resistance, temperature cycling tests, bend strength and environmental stress cracking. Also included are tests related to system malfunctions. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems, and building supply lines.  
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
Note 1: Suggested hydrostatic design stresses and hydrostatic pressure ratings for tubing and fittings are listed in Appendix X1. UV labeling guidelines are provided in Appendix X2. Design, assembly, and installation considerations are provided in Appendix X3. An optional performance qualification and an in-plant quality control program are recommended in Appendix X4.  
1.3 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.  
1.4 The following safety hazards caveat pertains only to the test methods portion, Section 7, 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.  
1.5 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: 31-Jan-2024
• ICS: 23.040.01 - Pipeline components and pipelines in general
• ICS: 91.140.60 - Water supply systems
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.26 - Olefin Based Pipe

Relations

• Replaces: ASTM F2769-23a - Standard Specification for Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems
• Effective Date: 01-Feb-2024
• Refers: ASTM F1473-24 - Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
• Effective Date: 01-Apr-2024
• Refers: ASTM D3261-24 - Standard Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
• Effective Date: 01-Feb-2024
• Refers: ASTM F1473-23 - Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
• Effective Date: 01-Jul-2023
• Refers: ASTM D3261-16 - Standard Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
• Effective Date: 01-Nov-2016
• Referred By: ASTM F2165-19 - Standard Specification for Flexible Pre-Insulated Plastic Piping
• Effective Date: 01-Feb-2024
• Referred By: ASTM F2080-23 - Standard Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe and SDR9 Polyethylene of Raised Temperature (PE-RT) Pipe
• Effective Date: 01-Feb-2024
• Referred By: ASTM F2623-24 - Standard Specification for Polyethylene of Raised Temperature (PE-RT) Systems for Non-Potable Water Applications
• Effective Date: 01-Feb-2024
• Referred By: ASTM F3348-23a - Standard Specification for Plastic Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Feb-2024
• Referred By: ASTM F2098-18 - Standard Specification for Stainless Steel Clamps for Securing SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) to Metal Insert and Plastic Insert Fittings
• Effective Date: 01-Feb-2024
• Referred By: ASTM F1807-23 - Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps, for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Feb-2024
• Referred By: ASTM F1960-23b - Standard Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Feb-2024
• Referred By: ASTM F412-23 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Feb-2024
• Referred By: ASTM F1055-16a(2022) - Standard Specification for Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing
• Effective Date: 01-Feb-2024
• Referred By: ASTM F2159-23a - Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps for SDR9 Crosslinked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 01-Feb-2024

Overview

ASTM F2769-24 is the standard specification for Polyethylene of Raised Temperature (PE-RT) plastic hot and cold-water tubing and distribution system components. Developed by ASTM International, this specification outlines the essential requirements for PE-RT tubing, fittings, valves, and manifolds used in residential and commercial potable water systems. With a focus on performance at elevated temperatures and durability under pressure, ASTM F2769-24 ensures that PE-RT piping materials are suitable for the demands of modern plumbing applications where both hot- and cold-water conveyance is necessary.

Key Topics

• Material Requirements

  • Specifies the use of PE-RT virgin or reworked plastic for tubing.
  • Ensures all fittings are made from corrosion-resistant materials.
  • Incorporates options for multilayer construction to improve functionality.

• Performance Criteria

  • Products must meet specific standards for dimensions, wall thickness, and tolerances.
  • Testing requirements include burst pressure, sustained pressure, oxidative stability, and environmental stress cracking.
  • Tubing and assemblies must withstand maximum working temperature of 180 °F (82 °C) and service pressures up to 100 psig (6.9 bar).

• System Integrity

  • Components are tested for reliability under thermocycling and high-pressure conditions.
  • Joint and system assembly integrity verified through thermal cycling, adhesion, and stress crack resistance testing.

• Safety & Compliance

  • All potable water components must be certified as safe per National Sanitation Foundation (NSF) Standard 61 and related health authorities.
  • Adherence to proper safety, health, and environmental practices is emphasized.

Applications

The ASTM F2769-24 standard is highly relevant for the following applications:

• Residential Water Distribution: PE-RT tubing and components are ideal for hot and cold potable water supply systems within homes, including both new construction and retrofit projects.
• Commercial & Institutional Plumbing: Suitable for multi-unit buildings, hotels, schools, and office buildings, where high reliability and safety are paramount.
• Building Supply Lines: The enhanced temperature and pressure capabilities enable safe and prolonged use in various building supply pipelines.
• Retrofit & Renovation: Lightweight and flexible PE-RT solutions simplify installation and accommodate complex piping routes often encountered in renovations.
• Systems Requiring Corrosion Resistance: PE-RT’s chemical resilience offers advantages in locations with aggressive water chemistry or corrosive environments.

This standard supports market needs for efficient, durable, and safe water delivery systems compliant with international plumbing requirements.

Related Standards

The performance and testing methods in ASTM F2769-24 reference, align with, or complement many significant standards, including:

• ASTM D3350: Specification for polyethylene plastics pipe and fittings materials.
• ASTM F1055, F1807, F1960, F2080, F2159, F2735: Various specifications for fittings compatible with PE-RT and PEX tubing.
• ASTM D2122, D1598, D1599: Test methods for dimensions, sustained internal pressure, and resistance to hydraulic pressure.
• NSF 14 and NSF 61: Standards for health effects and certification of plastic piping materials for drinking water systems.
• ISO 13760: Calculation methods for cumulative pressure damage in plastic pipes.
• PPI TR-3 and TR-4: Procedures and listings for hydrostatic design basis and strength ratings for thermoplastic piping systems.

Choosing materials and system components in accordance with ASTM F2769-24 supports compliance with the latest best practices, ensuring water distribution safety, reliability, and regulatory acceptance. This standard facilitates safer, more efficient potable water delivery in a diverse range of environments, leveraging the advanced properties of raised temperature polyethylene.

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: F2769 − 24 An American National Standard
Standard Specification for
Polyethylene of Raised Temperature (PE-RT) Plastic Hot and
Cold-Water Tubing and Distribution Systems
This standard is issued under the fixed designation F2769; 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 establishes requirements for polyeth-
environmental practices and determine the applicability of
ylene of raised temperature (PE-RT) plastic hot- and cold-
regulatory limitations prior to use.
water tubing and distribution systems components made in one
1.5 This international standard was developed in accor-
standard dimension ratio and intended for 100 psig (6.9 bar)
dance with internationally recognized principles on standard-
water service up to and including a maximum working
ization established in the Decision on Principles for the
temperature of 180 °F (82 °C). Components are comprised of
Development of International Standards, Guides and Recom-
tubing, fittings, valves and manifolds. Tubing may incorporate
mendations issued by the World Trade Organization Technical
an optional polymeric inner, middle or outer layer. Testing of
Barriers to Trade (TBT) Committee.
fittings and PE-RT tubing to the requirements of this standard
indicate that these fittings are appropriate for use with PE-RT
2. Referenced Documents
piping systems. Requirements and test methods are included
2.1 ASTM Standards:
for materials, workmanship, dimensions and tolerances, burst
D618 Practice for Conditioning Plastics for Testing
pressure, sustained pressure, oxidative resistance, temperature
D1598 Test Method for Time-to-Failure of Plastic Pipe
cycling tests, bend strength and environmental stress cracking.
Under Constant Internal Pressure
Also included are tests related to system malfunctions. The
D1599 Test Method for Resistance to Short-Time Hydraulic
components covered by this specification are intended for use
Pressure of Plastic Pipe, Tubing, and Fittings
in residential and commercial, hot and cold, potable water
D1600 Terminology for Abbreviated Terms Relating to Plas-
distribution systems, and building supply lines.
tics (Withdrawn 2024)
1.2 The text of this specification references notes, footnotes,
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
and appendixes which provide explanatory material. These
D2122 Test Method for Determining Dimensions of Ther-
notes and footnotes (excluding those in tables and figures) shall
moplastic Pipe and Fittings
not be considered as requirements of the specification.
D2683 Specification for Socket-Type Polyethylene Fittings
NOTE 1—Suggested hydrostatic design stresses and hydrostatic pressure
for Outside Diameter-Controlled Polyethylene Pipe and
ratings for tubing and fittings are listed in Appendix X1. UV labeling
Tubing
guidelines are provided in Appendix X2. Design, assembly, and installa-
D2749 Symbols for Dimensions of Plastic Pipe Fittings
tion considerations are provided in Appendix X3. An optional perfor-
mance qualification and an in-plant quality control program are recom- D2837 Test Method for Obtaining Hydrostatic Design Basis
mended in Appendix X4.
for Thermoplastic Pipe Materials or Pressure Design Basis
for Thermoplastic Pipe Products
1.3 Units—The values stated in inch-pound units are to be
regarded as standard. The values given in parentheses are D3261 Specification for Butt Heat Fusion Polyethylene (PE)
Plastic Fittings for Polyethylene (PE) Plastic Pipe and
mathematical conversions to SI units that are provided for
information only and are not considered standard. Tubing
D3350 Specification for Polyethylene Plastics Pipe and Fit-
1.4 The following safety hazards caveat pertains only to the
tings Materials
test methods portion, Section 7, of this specification. This
D3895 Test Method for Oxidative-Induction Time of Poly-
standard does not purport to address all of the safety concerns,
olefins by Differential Scanning Calorimetry
1 2
This test method 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 F17.26 on Olefin contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Based Pipe. 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.
approved in 2009. Last previous edition approved in 2023 as F2769–23a. DOI: The last approved version of this historical standard is referenced on
10.1520/F2769-24. www.astm.org.
*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
F2769 − 24
F412 Terminology Relating to Plastic Piping Systems (PDB) and Minimum Required Strength (MRS) Ratings
F1055 Specification for Electrofusion Type Polyethylene for Thermoplastic Piping Materials or Pipe
Fittings for Outside Diameter Controlled Polyethylene 7
2.6 NSF Standards:
and Crosslinked Polyethylene (PEX) Pipe and Tubing
NSF 14 Standard No. 14 for Plastic Piping Components and
F1282 Specification for Polyethylene/Aluminum/
Related Materials
Polyethylene (PE-AL-PE) Composite Pressure Pipe
NSF 61 Drinking Water System Components – Health Ef-
F1290 Practice for Electrofusion Joining Polyolefin Pipe and
fects
Fittings
2.7 ISO Standard:
F1473 Test Method for Notch Tensile Test to Measure the
ISO 13760 : Plastics pipes for the conveyance of fluids under
Resistance to Slow Crack Growth of Polyethylene Pipes
pressure -- Miner’s rule -- Calculation method for cumu-
and Resins
lative damage
F1960 Specification for Cold Expansion Fittings with PEX
Reinforcing Rings for Use with Cross-linked Polyethylene
3. Terminology
(PEX) and Polyethylene of Raised Temperature (PE-RT)
Tubing
3.1 Terminology used in this standard is in accordance with
F1807 Specification for Metal Insert Fittings Utilizing a
Terminologies F412, D1600, and D2749 unless otherwise
Copper Crimp Ring, or Alternate Stainless Steel Clamps,
specified. The abbreviation for polyethylene of raised tempera-
for SDR9 Cross-linked Polyethylene (PEX) Tubing and
ture is PE-RT. Plastic tubing denotes a particular diameter
SDR9 Polyethylene of Raised Temperature (PE-RT) Tub-
schedule of plastic pipe in which outside diameter of the tubing
ing
is equal to the nominal size plus ⁄8 in. Plastic pipe outside
F2023 Test Method for Evaluating the Oxidative Resistance
diameter schedule conforms to ANSI B36.10.
of Crosslinked Polyethylene (PEX) Pipe, Tubing and
3.2 standard dimension ratio (SDR), n—a specific ratio of
Systems to Hot Chlorinated Water
the average specified outside diameter to the minimum speci-
F2159 Specification for Plastic Insert Fittings Utilizing a
fied wall thickness (D /t) for outside diameter-controlled plas-
Copper Crimp Ring, or Alternate Stainless Steel Clamps
tic pipe, the value of which is derived by adding one to the
for SDR9 Crosslinked Polyethylene (PEX) Tubing and
pertinent number selected from the ANSI Preferred Number
SDR9 Polyethylene of Raised Temperature (PE-RT) Tub-
Series 10. F412
ing
3.2.1 Discussion—For PE-RT-tubing, it is calculated by
F2620 Practice for Heat Fusion Joining of Polyethylene Pipe
dividing the average outside diameter of the tubing in inches or
and Fittings
in millimeters by the minimum wall thickness in inches or
F2735 Specification for Plastic Insert Fittings For SDR9
millimeters. If the wall thickness calculated by this formula is
Cross-linked Polyethylene (PEX) and Polyethylene of
less than 0.070 in. (1.78 mm) it shall be arbitrarily increased to
Raised Temperature (PE-RT) Tubing
0.070 in. except for sizes ⁄16 in. and smaller. The SDR values
F2080 Specification for Cold-Expansion Fittings with Metal
shall be rounded to the nearest 0.5
Compression-Sleeves for Crosslinked Polyethylene (PEX)
3.3 Definitions of Terms Specific to This Standard:
Pipe and SDR9 Polyethylene of Raised Temperature
3.3.1 hydrostatic design stress (HDS), n—the estimated
(PE-RT) Pipe
maximum tensile stress the material is capable of withstanding
2.2 ANSI Standard:
continuously with a high degree of certainty that failure of the
B36.10 Standards Dimensions of Steel Pipe (NTS)
tube will not occur. This stress is circumferential when internal
Z 17.1 Preferred Numbers
5 hydrostatic water pressure is applied. For materials with
2.3 Federal Standard:
Hydrostatic Strength Classification 3 or 4 per Specification
FED-STD-123 Marking for Shipment (Civil Agencies)
D3350, the HDS is equal to the hydrostatic design basis (HDB)
2.4 Military Standard:
times the design factor (DF) for water. For this standard, the
MIL-STD-129 Marking for Shipment and Storage
design factor is equal to 0.5.
2.5 PPI Publications:
HDS 5 HDB × DF
PPI TR-3 Policies and Procedures for Developing Hydro-
5 HDB × 0.5 for this standard
~ !
static Design Basis (HDB), Hydrostatic Design Stresses
(HDS), Pressure Design Basis (PDB), Strength Design 3.3.2 relation between dimensions, hydrostatic design
Basis (SDB), and Minimum Required Strength (MRS) stress, and pressure rating, n—the following expression, com-
Ratings for Thermoplastic Piping Materials or Pipe monly known as the ISO equation , is used in this specification
PPI TR-4 PPI Listing of Hydrostatic Design Basis (HDB), to relate dimensions, hydrostatic design stress, and pressure
Strength Design Basis (SDB), Pressure Design Basis rating:
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA Arbor, MI 48113-0140, http://www.nsf.org.
19111-5094 http://quicksearch.dla.mil/ Available from International Organization for Standardization (ISO), 1, ch. de
Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://
Irving, TX 75062, http://www.plasticpipe.org. www.iso.ch.
F2769 − 24
TABLE 2 Pressure Ratings for PE-RT SDR 9 Tubing for Water
2HDS/P 5 D /t 2 1 (1)
~ !
o
Rated Minimum Hydrostatic Minimum Pressure
or Temperature Design Stress Rating for Water
°F (°C) psi (MPa) psi (bar)
2HDS/P 5 R 2 1
73.4 (23) 640 (4.41) 160 (11.0)
180 (82.2) 400 (2.76) 100 (6.90)
where:
HDS = hydrostatic design stress, psi (or MPa),
P = pressure rating, psig (or MPa),
DO = average outside diameter, in. (or mm),
criteria namely, basic short-term properties, 5.2.1, and long-
t = minimum wall thickness, in. (or mm), and
term hydrostatic properties, 5.2.2.
R = standard dimension ratio, SDR.
5.2.1 Basic Short-Term Properties—This specification cov-
3.3.3 standard thermoplastic material designated code,
ers tubing materials meeting the following requirements:
n—the pipe material designation code shall consist of the
5.2.1.1 Classification—Polyethylene materials suitable for
abbreviation for the type of plastic (PE) followed by Arabic
use in the manufacture of tubing under this specification shall
numerals which describe the short term properties in accor-
be classified in accordance with Specification D3350 as shown
dance with Specification D3350, the hydrostatic design stress
in Table 1.
for water at 73 °F (23 °C) in units of 100 psi with any decimal
5.2.2 Long-Term Hydrostatic Strength—This specification
figures dropped. Where the hydrostatic design stress code
covers PE-RT tubing which is further defined on the basis of
contains less than two figures, a zero is used before the number.
long-term hydrostatic strength tests (Appendix X1). The ma-
3.3.3.1 Discussion—Further information regarding testing
terial shall have a minimum pressure rating as per Table 2.
and approval can be obtained from the National Sanitation
5.3 Barrier Layers—PE-RT tubing may incorporate an op-
Foundation or other accredited laboratory.
tional interior wall, mid wall or outer wall layer or a combi-
nation of such layers of non-PE-RT material for the express
4. Classification
purpose of providing gas barrier properties to the pipe. The
4.1 Tubing—This specification covers one PE-RT tubing
tubing shall meet the minimum wall thickness requirements of
material in one standard dimension ratio, 9.0, and by a
this standard without using the barrier layer thickness in the
maximum continuous use temperature that shall be 180 °F
determinations. PE-RT tubing with a barrier layer within the
(82 °C), and by nominal tubing sizes from ⁄8 through 6.
wall of the tubing (neither exterior layer nor interior layer)
4.2 Fittings—This specification classifies fittings, including
shall demonstrate a hydrostatic design stress (HDS) rating
manifolds, intended for use in systems with PE-RT tubing, by
equivalent to that of PE-RT tubing without a barrier layer. This
a maximum continuous use temperature that shall be 180 °F
determination shall be made in accordance with policies no less
(82 °C) and by nominal sizes from ⁄8 through 6 on the basis of
restrictive than those of the PPI TR-3 and meet the require-
resistance to burst pressure, hydrostatic sustained pressure,
ments of this standard.
excessive temperature and pressure, and thermocycling.
5.4 Rework Material—Clean rework material of the same
commercial designation, generated from the manufacturer’s
5. Materials
own tubing production shall not be used unless the tubing
5.1 General—The polyethylene used to make tubing shall
produced meet all the requirements of this specification. PE-RT
be virgin plastic or reworked plastic, or both, as specified in
tubing with a barrier layer shall not be used for rework
5.4, that meets the requirements of this standard and shall have
material.
a Plastic Pipe Institute (PPI) rating at 73 °F (23 °C) and 180 °F
5.5 Tubing Material Designation—The tubing meeting the
(82 °C). Fitting materials shall meet the applicable material
requirements of this specification shall be designated PE-RT.
requirements of a least one of the Specifications D2683,
D3261, F1055, F1807, F1960, F2080, F2159, or F2735.
5.6 Certification—Tubing and fittings intended for use in the
Polyethylene material used in fusion fittings shall meet the
transport of potable water shall be evaluated and certified as
requirements of Table 1 and Table 2. Fittings shall be made
safe for this purpose by a testing agency acceptable to the local
from materials that are generally regarded as corrosion resis-
health authority. The evaluation shall be in accordance with the
tant.
requirements for chemical extraction that are not less restric-
tive than those included in NSF Standard 61. The seal or mark
5.2 Basic Tubing Materials—PE-RT tubing meeting the
of the laboratory making the evaluation shall be included on
requirements of this specification are primarily defined by two
the tubing.
NOTE 2—Further information regarding testing and approval can be
TABLE 1 Required D3350 Cell Classification for PE-RT
obtained from an accredited certification provider.
Physical Properties: Cell Classification
Density 3 or 4
6. Requirements
Melt index 2, 3, 4, or 5
Flexural modulus 3 or higher 6.1 Workmanship—The tubing shall be homogeneous
Tensile strength 2 or higher
throughout and free of visible cracks, holes, foreign inclusions,
Slow crack growth resistance 7
or other defects. The tubing shall be as uniform as commer-
Hydrostatic Strength Classification 3 or 4
cially practicable in color, opacity, density, and other physical
F2769 − 24
properties. For tubing that incorporates a barrier layer per 5.3 6.4.1 If the manifold has more than one connection size, the
each layer shall meet the workmanship requirements per this test pressure selected from Table 5 shall be based on the largest
section. nominal tubing connection.
6.2 Dimensions and Tolerances: 6.5 Oxidative Resistance in Potable Chlorinated Water
6.2.1 The dimensions and tolerances of fittings shall meet Applications—PE-RT tubing chlorine classification codes shall
the specific requirements contained in Specifications D2683, be determined based on a minimum extrapolated time-to-
D3261, F1055, F1807, F1960, F2080, F2159, F2735, or other failure of 50 years when tested and evaluated in accordance
recognized specification. with 7.8 and Table 7.
6.2.2 Outside Diameters of Tubing—The outside diameters
6.6 Bent Tube—The following requirement applies to tubing
and tolerances of the tubing including the layers shall be as
up to 1 in. nominal diameter. Bent tubing, with a radius of 6
shown in Table 3, when measured in accordance with 7.4 and
times the outside diameter and consisting of a continuous bend
7.4.1.
length inducing not less than 90° angle, shall meet the 180 °F
6.2.3 Wall Thickness of Tubing—The wall thickness and
(82.2 °C) minimum hydrostatic sustained pressure strength
tolerances shall be as shown in Table 4, when measured in
requirements shown in Table 5 when tested in accordance with
accordance with 7.4 and 7.4.2.
7.9. The bend length and bend angle is kept throughout the
6.2.3.1 Layer—Tubing that incorporates an inner, middle or
testing period by rigid secures immediately outside the bend.
outer layer shall meet the minimum wall thickness and
The minimum test duration shall be 1000 h without failure.
tolerances requirements as specified in Table 4. In addition, the
NOTE 3—PE-RT tubing, larger than 1 in. nominal diameter, is typically
layer shall not result in the reduction of the total PE-RT
installed as main distribution lines and is installed in straight runs. Fittings
material below that specified in Table 4. In the case of tubing
are used when a change in direction of 90° or greater and a bend radius of
with a middle layer, the total base PE-RT material wall
less than 6 times the outside diameter is needed. The test requirements in
thickness shall be the sum of the inner and outer base PE-RT
6.7 are intended to evaluate PE-RT tubing installed in tight bend
material wall thicknesses. applications in accordance with the procedure in Appendix X3. This
application applies to tubing up to and including 1 in. nominal diameter
6.2.4 Out-of-Roundness—The maximum out-of-roundness
only.
requirements shown in Table 3 for tubing, apply to the average
6.7 Excessive Temperature Hydrostatic Sustained— Tubing
measured diameter. Tubing shall be measured prior to coiling.
and fittings, when tested as assemblies, shall not fail in less
6.3 Sustained Pressure—The tubing and fittings, assembled
than 720 h when tested in accordance with 7.10. If present,
using the manufacturer’s instructions and tested as assemblies,
valves shall be tested in the open or unrestricted position.
shall not fail, balloon, burst, or weep at the test pressures given
in Table 5 when tested in accordance with 7.5. NOTE 4—Tests applicable to tubing and fitting assemblies (6.3, 6.4, 6.7,
and 6.12.3) are intended to be performance qualification tests of joints and
6.3.1 If present, valves shall be tested in the open or
not tests required of each fitting configuration.
unrestricted position.
6.8 Environmental Stress Cracking—There shall be no loss
6.4 Burst Pressure—The tubing and fittings, assembled
of pressure in the tubing, when tested in accordance with 7.11.
using the manufacturer’s instructions and tested as assemblies,
shall meet the minimum burst pressure given in Table 6, when 6.9 Adhesion Test—Tubing that incorporates an optional
determined in accordance with 7.6. Leakage or separation at inner, middle or outer layer shall not show any delamination
any of the fittings tested shall constitute failure of the fitting. when tested in accordance with 9.3.1 of Specification F1282.
TABLE 3 Outside Diameters and Tolerances for PE-RT Tubing
A
Nominal Tubing Size Average Outside Diameter Tolerances for Average Diameter Out-of-Roundness
in. (mm) in. (mm) in. (mm) in. (mm)
⁄8 (3) 0.250 (6.35) ±0.003 (±0.08) 0.008 (0.20)
⁄4 (7) 0.375 (9.52) ±0.003 (±0.08) 0.008 (0.20)
⁄16 (8) 0.430 (10.92) ±0.003 (±0.08) 0.008 (0.20)
⁄8 (10) 0.500 (12.70) ±0.003 (±0.08) 0.012 (0.32)
⁄2 (13) 0.625 (15.88) ±0.004 (±0.10) 0.016 (0.40)
⁄8 (16) 0.750 (19.05) ±0.004 (±0.10) 0.016 (0.40)
⁄4 (19) 0.875 (22.22) ±0.004 (±0.10) 0.016 (0.40)
1 (25) 1.125 (28.58) ±0.005 (±0.12) 0.020 (0.48)
1 ⁄4 (32) 1.375 (34.92) ±0.005 (±0.12) 0.020 (0.48)
1 ⁄2 (38) 1.625 (41.28) ±0.006 (±0.16) 0.024 (0.60)
2 (51) 2.125 (53.98) ±0.006 (±0.16) 0.030 (0.76)
2 ⁄2 (64) 2.625 (66.68) ±0.007 (±0.18) 0.038 (0.95)
3 (76) 3.125 (79.38) ±0.008 (±0.20) 0.045 (1.14)
3 ⁄2 (89) 3.625 (92.08) ±0.008 (±0.20) 0.046 (1.16)
4 (102) 4.125 (104.78) ±0.009 (±0.23) 0.052 (1.32)
4 ⁄2 (114) 4.625 (117.48) ±0.009 (±0.23) 0.059 (1.49)
5 (127) 5.125 (130.18) ±0.010 (±0.25) 0.065 (1.65)
6 (152) 6.125 (155.58) ±0.011 (±0.28) 0.072 (1.83)
A
The Out-of-Roundness specification applies only to tubing prior to coiling.
F2769 − 24
A
TABLE 4 Wall Thickness and Tolerances for PE-RT SDR 9 Tubing
Nominal Tubing Minimum Wall Thickness Tolerance
in. (mm) in. (mm) in. (mm)
B B
⁄8 (3) 0.047 (1.19 ) +0.007 (+0.18)
B B
⁄4 (7) 0.062 (1.57 ) +0.010 (+0.25)
⁄16 (8) 0.064 (1.63) +0.010 (+0.25)
B B
⁄8 (10) 0.070 (1.78 ) +0.010 (+0.25)
B B
⁄2 (13) 0.070 (1.78 ) +0.010 (+0.25)
⁄8 (16) 0.083 (2.12) +0.010 (+0.25)
⁄4 (19 0.097 (2.47) +0.010 (+0.25)
1 (25) 0.125 (3.18) +0.013 (+0.33)
1 ⁄4 (32) 0.153 (3.88) +0.015 (+0.38)
1 ⁄2 (38) 0.181 (4.59) +0.019 (+0.48)
2 (51) 0.236 (6.00) +0.024 (+0.61)
2 ⁄2 (64) 0.292 (7.41) +0.030 (+0.76)
3 (76) 0.347 (8.82) +0.033 (+0.84)
3 ⁄2 (89) 0.403 (10.23) +0.035 (+0.89)
4 (102) 0.458 (11.64) +0.040 (+1.02)
4 ⁄2 (114) 0.514 (13.05) +0.045 (+1.14)
5 (127) 0.569 (14.46) +0.050 (+1.27)
6 (152) 0.681 (17.29) +0.060 (+1.52)
A
The minimum is the lowest wall thickness of the tubing at any cross section. The maximum permitted wall thickness, at any cross section, is the minimum wall thickness
plus the stated tolerance. All tolerances are on the plus side of the minimum requirement.
B
For tubing sizes of ⁄2 in. and below, wall thickness minimums are not functions of SDR.
TABLE 5 Sustained Water Pressure Test Condition for PE-RT SDR 9 Tubing
A
Pressure Required for Test, psig A (MPa)
Nominal Tubing For 1250 psi HDB at 73.4 °F For 1600 psi HDB at 73.4 °F
Size
73 °F (23 °C) 180 °F (82 °C) 73 °F (23 °C) 180 °F (82 °C)
⁄8 595 (4.10) 355 (2.45) 740 (5.10) 355 (2.45)
⁄4 515 (3.55) 305 (2.10) 635 (4.38) 305 (2.10)
⁄16 455 (3.14) 270 (1.86) 560 (3.86) 270 (1.86)
⁄8 425 (2.93) 250 (1.72) 520 (3.59) 250 (1.72)
⁄2 330 (2.28) 195 (1.34) 405 (2.79) 195 (1.34)
⁄8 and larger 325 (2.24) 190 (1.31) 400 (2.76) 190 (1.31)
A
The fiber stresses used to derive these test pressures are:
at 73 °F (23 °C) 1300 psi (8.96 MPa) for a 1250 psi HDB material and 1600 psi (11.0 MPa) for a 1600 psi HDB material
at 180 °F (82 °C) 770 psi (5.31 MPa)
TABLE 6 Burst Water Pressure Test Condition for PE-RT SDR 9 Tubing
A
Pressure Required for Test, psig (MPa)
Nominal Tubing Size For 1250 psi HDB at 73 °F For 1600 psi HDB at 73 °F
73 °F (23 °C) 180 °F (82 °C) 73 °F (23 °C) 180 °F (82 °C)
⁄8 870 (6.00) 495 (3.41) 1345 (9.28) 495 (3.41)
⁄4 752 (5.19) 420 (2.90) 1150 (7.93) 420 (2.90)
⁄16 660 (4.55) 370 (2.55) 1015 (7.00) 370 (2.55)
⁄8 620 (4.27) 345 (2.38) 945 (6.52) 345 (2.38)
⁄2 480 (3.31) 270 (1.86) 730 (5.03) 270 (1.86)
⁄8 and larger 475 (3.27) 265 (1.83) 720 (4.97) 265 (1.83)
A
The fiber stresses used to derive these test pressures are:
at 73 °F (23 °C) 1900 psi (13.10 MPa) for a 1250 psi HDB material and 2900 psi (20.0 MPa) for a 1600 psi HDB material
at 180 °F (82 °C) 1065 psi (7.33 MPa)
TABLE 7 Oxidative Resistance Classification Codes
6.11.1 Tubing may be fusion joined using Specification
Standard CL1 CL2 CL3 CL4 CL5 F1055 electrofusion fittings, Specification D2683 socket fusion
Usage 75% at Reserved 50% at 73 °F Reserved 100%
fittings or Specification D3261 butt heat fusion fittings. The
Ratios 73 °F and for future and for future at
tubing manufacturer shall indicate the recommended fitting
25 % at use 50 % at use 140 °F
140 °F 140 °F
types for use with their tubing as indicated in Section 9.
6.11.2 Tubing with external barrier layers shall only be
joined by fusion if recommended by the tubing manufacturer
and tubing is prepared so as to completely remove the barrier
layer within the fusion zone per the tubing manufacturer’s
6.10 Slow Crack Growth Resistance—The slow crack
recommendations. Tubing with mid-wall barrier layers shall
growth resistance of the tubing material shall not be less than
not be joined with fusion fittings.
500 h when tested in accordance with 7.12.
6.11 Joints-Fusion: NOTE 5—An external barrier layer will compromise electrofusion or
F2769 − 24
socket fusion joining if not completely removed. A mid-wall barrier layer
specified by the test method referred to in this standard. If
will compromise butt fusion joining. Exposure of the a mid-wall barrier
present, valves shall be tested in the open or unrestricted
layer to the transported fluid may degrade the layer performance.
position.
6.11.3 Electrofusion:
7.4 Dimensions and Tolerances—Use any length of tubing
6.11.3.1 Electrofusion joints between tubing and Specifica-
to determine the dimensions. Measure in accordance with Test
tion F1055 fittings shall be made in accordance with Practice
Method D2122.
F1290 and the fitting manufacturer’s instructions.
7.4.1 Outside Diameter—Measure the outside diameter of
6.11.3.2 Qualification of the fitting with PE-RT tubing shall
the tubing in accordance with Test Method D2122. The referee
be performed in accordance with 6.3, 6.4 and Specification
method of measurement is to be by circumferential wrap tape.
F1055.
The tolerance for out-of-roundness shall apply only to tubing
6.11.4 Socket Fusion:
prior to shipment. Averaging micrometer or vernier caliper
6.11.4.1 Socket fusion joints between tubing and Specifica-
measurements, four (4) maximum and minimum diameter
tion D2683 fittings shall be made in accordance with Practice
measurements at any cross section, may be used for quality
F2620 and the fitting manufacturer’s instructions.
control checks if desired.
6.11.4.2 Qualification of Specification D2683 fittings with
7.4.2 Wall Thickness—Make micrometer measurements of
PE-RT shall be performed in accordance with 6.3, 6.4.
the wall thickness in accordance with Test Method D2122 to
6.11.5 Butt Heat Fusion:
determine the maximum and minimum values. Measure the
6.11.5.1 Butt fusion joints between tubing and Specification
wall thickness at both ends of the tubing to the nearest 0.001 in.
D3261 fittings shall be made in accordance with Practice
(0.025 mm).
F2620 and the fitting manufacturer’s instructions.
7.4.2.1 Layer—Make measurements of the layer or layers
6.11.5.2 Qualification of the fitting with PE-RT shall be
using either a video microscope, a microscope with 0.001 inch
performed in accordance with 6.3, 6.4.
graduation or optical comparator to determine the maximum
6.12 Joints - Mechanical Insert:
and minimum values.
6.12.1 Mechanical insert fittings shall be installed in accor-
7.5 Sustained Pressure Test—Select the test specimens at
dance with the fitting manufacturer’s installation instructions.
random. Test at least six joints and at least six tubing specimens
6.12.2 Qua
...

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: F2769 − 23a F2769 − 24 An American National Standard
Standard Specification for
Polyethylene of Raised Temperature (PE-RT) Plastic Hot and
Cold-Water Tubing and Distribution Systems
This standard is issued under the fixed designation F2769; 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 establishes requirements for polyethylene of raised temperature (PE-RT) plastic hot- and cold-water tubing
and distribution systems components made in one standard dimension ratio and intended for 100 psig (6.9 bar) water service up
to and including a maximum working temperature of 180 °F (82 °C). Components are comprised of tubing, fittings, valves and
manifolds. Tubing may incorporate an optional polymeric inner, middle or outer layer. Testing of fittings and PE-RT tubing to the
requirements of this standard indicate that these fittings are appropriate for use with PE-RT piping systems. Requirements and test
methods are included for materials, workmanship, dimensions and tolerances, burst pressure, sustained pressure, oxidative
resistance, temperature cycling tests, bend strength and environmental stress cracking. Also included are tests related to system
malfunctions. The components covered by this specification are intended for use in residential and commercial, hot and cold,
potable water distribution systems, and building supply lines.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
NOTE 1—Suggested hydrostatic design stresses and hydrostatic pressure ratings for tubing and fittings are listed in Appendix X1. UV labeling guidelines
are provided in Appendix X2. Design, assembly, and installation considerations are provided in Appendix X3. An optional performance qualification and
an in-plant quality control program are recommended in Appendix X4.
1.3 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.
1.4 The following safety hazards caveat pertains only to the test methods portion, Section 7, 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.
1.5 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.
2. Referenced Documents
2.1 ASTM Standards:
This test method is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.26 on Olefin Based
Pipe.
Current edition approved April 1, 2023Feb. 1, 2024. Published April 2023February 2024. Originally approved in 2009. Last previous edition approved in 2023 as
F2769–23. DOI: 10.1520/F2769-23A.–23a. DOI: 10.1520/F2769-24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
F2769 − 24
D618 Practice for Conditioning Plastics for Testing
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
D1600 Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2683 Specification for Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing
D2749 Symbols for Dimensions of Plastic Pipe Fittings
D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for
Thermoplastic Pipe Products
D3261 Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
D3350 Specification for Polyethylene Plastics Pipe and Fittings Materials
D3895 Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry
F412 Terminology Relating to Plastic Piping Systems
F1055 Specification for Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked
Polyethylene (PEX) Pipe and Tubing
F1282 Specification for Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure Pipe
F1290 Practice for Electrofusion Joining Polyolefin Pipe and Fittings
F1473 Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
F1960 Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX)
and Polyethylene of Raised Temperature (PE-RT) Tubing
F1807 Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps, for SDR9
Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
F2023 Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Pipe, Tubing and Systems to
Hot Chlorinated Water
F2159 Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps for SDR9
Crosslinked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
F2620 Practice for Heat Fusion Joining of Polyethylene Pipe and Fittings
F2735 Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised
Temperature (PE-RT) Tubing
F2080 Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe and
SDR9 Polyethylene of Raised Temperature (PE-RT) Pipe
2.2 ANSI Standard:
B36.10 Standards Dimensions of Steel Pipe (NTS)
Z 17.1 Preferred Numbers
2.3 Federal Standard:
FED-STD-123 Marking for Shipment (Civil Agencies)
2.4 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
2.5 PPI Publications:
PPI TR-3 Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS),
Pressure Design Basis (PDB), Strength Design Basis (SDB), and Minimum Required Strength (MRS) Ratings for
Thermoplastic Piping Materials or Pipe
PPI TR-4 PPI Listing of Hydrostatic Design Basis (HDB), Strength Design Basis (SDB), Pressure Design Basis (PDB) and
Minimum Required Strength (MRS) Ratings for Thermoplastic Piping Materials or Pipe
2.6 NSF Standards:
NSF 14 Standard No. 14 for Plastic Piping Components and Related Materials
NSF 61 Drinking Water System Components – Health Effects
2.7 ISO Standard:
ISO 13760 : Plastics pipes for the conveyance of fluids under pressure -- Miner’s rule -- Calculation method for cumulative
damage
The last approved version of this historical standard is referenced on www.astm.org.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA 19111-5094 http://quicksearch.dla.mil/
Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http://www.plasticpipe.org.
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http://www.nsf.org.
Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
F2769 − 24
3. Terminology
3.1 Terminology used in this standard is in accordance with Terminologies F412, D1600, and D2749 unless otherwise specified.
The abbreviation for polyethylene of raised temperature is PE-RT. Plastic tubing denotes a particular diameter schedule of plastic
pipe in which outside diameter of the tubing is equal to the nominal size plus ⁄8 in. Plastic pipe outside diameter schedule conforms
to ANSI B36.10.
3.2 standard dimension ratio (SDR), n—a specific ratio of the average specified outside diameter to the minimum specified wall
thickness (D /t) for outside diameter-controlled plastic pipe, the value of which is derived by adding one to the pertinent number
selected from the ANSI Preferred Number Series 10. F412
3.2.1 Discussion—
For PE-RT-tubing, it is calculated by dividing the average outside diameter of the tubing in inches or in millimeters by the
minimum wall thickness in inches or millimeters. If the wall thickness calculated by this formula is less than 0.070 in. (1.78 mm)
it shall be arbitrarily increased to 0.070 in. except for sizes ⁄16 in. and smaller. The SDR values shall be rounded to the nearest
0.5
3.3 Definitions of Terms Specific to This Standard:
3.3.1 hydrostatic design stress (HDS), n—the estimated maximum tensile stress the material is capable of withstanding
continuously with a high degree of certainty that failure of the tube will not occur. This stress is circumferential when internal
hydrostatic water pressure is applied. For materials with Hydrostatic Strength Classification 3 or 4 per Specification D3350, the
HDS is equal to the hydrostatic design basis (HDB) times the design factor (DF) for water. For this standard, the design factor is
equal to 0.5.
HDS 5 HDB ×DF
5 HDB ×0.5 ~for this standard!
3.3.2 relation between dimensions, hydrostatic design stress, and pressure rating, n—the following expression, commonly known
as the ISO equation , is used in this specification to relate dimensions, hydrostatic design stress, and pressure rating:
2HDS/P 5 D /t 2 1 (1)
~ !
o
or
2HDS/P 5 R 2 1
where:
HDS = hydrostatic design stress, psi (or MPa),
P = pressure rating, psig (or MPa),
DO = average outside diameter, in. (or mm),
t = minimum wall thickness, in. (or mm), and
R = standard dimension ratio, SDR.
3.3.3 standard thermoplastic material designated code, n—the pipe material designation code shall consist of the abbreviation for
the type of plastic (PE) followed by Arabic numerals which describe the short term properties in accordance with Specification
D3350, the hydrostatic design stress for water at 73 °F (23 °C) in units of 100 psi with any decimal figures dropped. Where the
hydrostatic design stress code contains less than two figures, a zero is used before the number.
3.3.3.1 Discussion—
Further information regarding testing and approval can be obtained from the National Sanitation Foundation or other accredited
laboratory.
4. Classification
4.1 Tubing—This specification covers one PE-RT tubing material in one standard dimension ratio, 9.0, and by a maximum
continuous use temperature that shall be 180 °F (82 °C), and by nominal tubing sizes from ⁄8 through 6.
4.2 Fittings—This specification classifies fittings, including manifolds, intended for use in systems with PE-RT tubing, by a
maximum continuous use temperature that shall be 180 °F (82 °C) and by nominal sizes from ⁄8 through 6 on the basis of
resistance to burst pressure, hydrostatic sustained pressure, excessive temperature and pressure, and thermocycling.
F2769 − 24
5. Materials
5.1 General—The polyethylene used to make tubing shall be virgin plastic or reworked plastic, or both, as specified in 5.4, that
meets the requirements of this standard and shall have a Plastic Pipe Institute (PPI) rating at 73 °F (23 °C) and 180 °F (82 °C).
Fitting materials shall meet the applicable material requirements of a least one of the Specifications D2683, D3261, F1055, F1807,
F1960, F2080, F2159, or F2735. Polyethylene material used in fusion fittings shall meet the requirements of Table 1 and Table
2. Fittings shall be made from materials that are generally regarded as corrosion resistant.
5.2 Basic Tubing Materials—PE-RT tubing meeting the requirements of this specification are primarily defined by two criteria
namely, basic short-term properties, 5.2.1, and long-term hydrostatic properties, 5.2.2.
5.2.1 Basic Short-Term Properties—This specification covers tubing materials meeting the following requirements:
5.2.1.1 Classification—Polyethylene materials suitable for use in the manufacture of tubing under this specification shall be
classified in accordance with Specification D3350 as shown in Table 1.
5.2.2 Long-Term Hydrostatic Strength—This specification covers PE-RT tubing which is further defined on the basis of long-term
hydrostatic strength tests (Appendix X1). The material shall have a minimum pressure rating as per Table 2.
5.3 Barrier Layers—PE-RT tubing may incorporate an optional interior wall, mid wall or outer wall layer or a combination of such
layers of non-PE-RT material for the express purpose of providing gas barrier properties to the pipe. The tubing shall meet the
minimum wall thickness requirements of this standard without using the barrier layer thickness in the determinations. PE-RT
tubing with a barrier layer within the wall of the tubing (neither exterior layer nor interior layer) shall demonstrate a hydrostatic
design stress (HDS) rating equivalent to that of PE-RT tubing without a barrier layer. This determination shall be made in
accordance with policies no less restrictive than those of the PPI TR-3 and meet the requirements of this standard.
5.4 Rework Material—Clean rework material of the same commercial designation, generated from the manufacturer’s own tubing
production shall not be used unless the tubing produced meet all the requirements of this specification. PE-RT tubing with a barrier
layer shall not be used for rework material.
5.5 Tubing Material Designation—The tubing meeting the requirements of this specification shall be designated PE-RT.
5.6 Certification—Tubing and fittings intended for use in the transport of potable water shall be evaluated and certified as safe for
this purpose by a testing agency acceptable to the local health authority. The evaluation shall be in accordance with the
requirements for chemical extraction that are not less restrictive than those included in NSF Standard 61. The seal or mark of the
laboratory making the evaluation shall be included on the tubing.
NOTE 2—Further information regarding testing and approval can be obtained from an accredited certification provider.
6. Requirements
6.1 Workmanship—The tubing shall be homogeneous throughout and free of visible cracks, holes, foreign inclusions, or other
defects. The tubing shall be as uniform as commercially practicable in color, opacity, density, and other physical properties. For
tubing that incorporates a barrier layer per 5.3 each layer shall meet the workmanship requirements per this section.
6.2 Dimensions and Tolerances:
TABLE 1 Required D3350 Cell Classification for PE-RT
Physical Properties: Cell Classification
Density 3 or 4
Melt index 2, 3, 4, or 5
Flexural modulus 3 or higher
Tensile strength 2 or higher
Slow crack growth resistance 7
Hydrostatic Strength Classification 3 or 4
F2769 − 24
TABLE 2 Pressure Ratings for PE-RT SDR 9 Tubing for Water
Rated Minimum Hydrostatic Minimum Pressure
Temperature Design Stress Rating for Water
°F (°C) psi (MPa) psi (bar)
73.4 (23) 640 (4.41) 160 (11.0)
180 (82.2) 400 (2.76) 100 (6.90)
6.2.1 The dimensions and tolerances of fittings shall meet the specific requirements contained in Specifications D2683, D3261,
F1055, F1807, F1960, F2080, F2159, F2735, or other recognized specification.
6.2.2 Outside Diameters of Tubing—The outside diameters and tolerances of the tubing including the layers shall be as shown in
Table 3, when measured in accordance with 7.4 and 7.4.1.
6.2.3 Wall Thickness of Tubing—The wall thickness and tolerances shall be as shown in Table 4, when measured in accordance
with 7.4 and 7.4.2.
6.2.3.1 Layer—Tubing that incorporates an inner, middle or outer layer shall meet the minimum wall thickness and tolerances
requirements as specified in Table 4. In addition, the layer shall not result in the reduction of the total PE-RT material below that
specified in Table 4. In the case of tubing with a middle layer, the total base PE-RT material wall thickness shall be the sum of
the inner and outer base PE-RT material wall thicknesses.
6.2.4 Out-of-Roundness—The maximum out-of-roundness requirements shown in Table 3 for tubing, apply to the average
measured diameter. Tubing shall be measured prior to coiling.
6.3 Sustained Pressure—The tubing and fittings, assembled using the manufacturer’s instructions and tested as assemblies, shall
not fail, balloon, burst, or weep at the test pressures given in Table 5 when tested in accordance with 7.5.
6.3.1 If present, valves shall be tested in the open or unrestricted position.
6.4 Burst Pressure—The tubing and fittings, assembled using the manufacturer’s instructions and tested as assemblies, shall meet
the minimum burst pressure given in Table 6, when determined in accordance with 7.6. Leakage or separation at any of the fittings
tested shall constitute failure of the fitting.
6.4.1 If the manifold has more than one connection size, the test pressure selected from Table 5 shall be based on the largest
nominal tubing connection.
TABLE 3 Outside Diameters and Tolerances for PE-RT Tubing
A
Nominal Tubing Size Average Outside Diameter Tolerances for Average Diameter Out-of-Roundness
in. (mm) in. (mm) in. (mm) in. (mm)
⁄8 (3) 0.250 (6.35) ±0.003 (±0.08) 0.008 (0.20)
⁄4 (7) 0.375 (9.52) ±0.003 (±0.08) 0.008 (0.20)
⁄16 (8) 0.430 (10.92) ±0.003 (±0.08) 0.008 (0.20)
⁄8 (10) 0.500 (12.70) ±0.003 (±0.08) 0.012 (0.32)
⁄2 (13) 0.625 (15.88) ±0.004 (±0.10) 0.016 (0.40)
⁄8 (16) 0.750 (19.05) ±0.004 (±0.10) 0.016 (0.40)
⁄4 (19) 0.875 (22.22) ±0.004 (±0.10) 0.016 (0.40)
1 (25) 1.125 (28.58) ±0.005 (±0.12) 0.020 (0.48)
1 ⁄4 (32) 1.375 (34.92) ±0.005 (±0.12) 0.020 (0.48)
1 ⁄2 (38) 1.625 (41.28) ±0.006 (±0.16) 0.024 (0.60)
2 (51) 2.125 (53.98) ±0.006 (±0.16) 0.030 (0.76)
2 ⁄2 (64) 2.625 (66.68) ±0.007 (±0.18) 0.038 (0.95)
3 (76) 3.125 (79.38) ±0.008 (±0.20) 0.045 (1.14)
3 ⁄2 (89) 3.625 (92.08) ±0.008 (±0.20) 0.046 (1.16)
4 (102) 4.125 (104.78) ±0.009 (±0.23) 0.052 (1.32)
4 ⁄2 (114) 4.625 (117.48) ±0.009 (±0.23) 0.059 (1.49)
5 (127) 5.125 (130.18) ±0.010 (±0.25) 0.065 (1.65)
6 (152) 6.125 (155.58) ±0.011 (±0.28) 0.072 (1.83)
A
The Out-of-Roundness specification applies only to tubing prior to coiling.
F2769 − 24
A
TABLE 4 Wall Thickness and Tolerances for PE-RT SDR 9 Tubing
Nominal Tubing Minimum Wall Thickness Tolerance
in. (mm) in. (mm) in. (mm)
B B
⁄8 (3) 0.047 (1.19 ) +0.007 (+0.18)
B B
⁄4 (7) 0.062 (1.57 ) +0.010 (+0.25)
⁄16 (8) 0.064 (1.63) +0.010 (+0.25)
3 B B
⁄8 (10) 0.070 (1.78 ) +0.010 (+0.25)
B B
⁄2 (13) 0.070 (1.78 ) +0.010 (+0.25)
⁄8 (16) 0.083 (2.12) +0.010 (+0.25)
⁄4 (19 0.097 (2.47) +0.010 (+0.25)
1 (25) 0.125 (3.18) +0.013 (+0.33)
1 ⁄4 (32) 0.153 (3.88) +0.015 (+0.38)
1 ⁄2 (38) 0.181 (4.59) +0.019 (+0.48)
2 (51) 0.236 (6.00) +0.024 (+0.61)
2 ⁄2 (64) 0.292 (7.41) +0.030 (+0.76)
3 (76) 0.347 (8.82) +0.033 (+0.84)
3 ⁄2 (89) 0.403 (10.23) +0.035 (+0.89)
4 (102) 0.458 (11.64) +0.040 (+1.02)
4 ⁄2 (114) 0.514 (13.05) +0.045 (+1.14)
5 (127) 0.569 (14.46) +0.050 (+1.27)
6 (152) 0.681 (17.29) +0.060 (+1.52)
A
The minimum is the lowest wall thickness of the tubing at any cross section. The maximum permitted wall thickness, at any cross section, is the minimum wall thickness
plus the stated tolerance. All tolerances are on the plus side of the minimum requirement.
B
For tubing sizes of ⁄2 in. and below, wall thickness minimums are not functions of SDR.
TABLE 5 Sustained Water Pressure Test Condition for PE-RT SDR 9 Tubing
A
Pressure Required for Test, psig A (MPa)
Nominal Tubing For 1250 psi HDB at 73.4 °F For 1600 psi HDB at 73.4 °F
Size
73 °F (23 °C) 180 °F (82 °C) 73 °F (23 °C) 180 °F (82 °C)
⁄8 595 (4.10) 355 (2.45) 740 (5.10) 355 (2.45)
⁄4 515 (3.55) 305 (2.10) 635 (4.38) 305 (2.10)
⁄16 455 (3.14) 270 (1.86) 560 (3.86) 270 (1.86)
⁄8 425 (2.93) 250 (1.72) 520 (3.59) 250 (1.72)
⁄2 330 (2.28) 195 (1.34) 405 (2.79) 195 (1.34)
⁄8 and larger 325 (2.24) 190 (1.31) 400 (2.76) 190 (1.31)
A
The fiber stresses used to derive these test pressures are:
at 73 °F (23 °C) 1300 psi (8.96 MPa) for a 1250 psi HDB material and 1600 psi (11.0 MPa) for a 1600 psi HDB material
at 180 °F (82 °C) 770 psi (5.31 MPa)
TABLE 6 Burst Water Pressure Test Condition for PE-RT SDR 9 Tubing
A
Pressure Required for Test, psig (MPa)
Nominal Tubing Size For 1250 psi HDB at 73 °F For 1600 psi HDB at 73 °F
73 °F (23 °C) 180 °F (82 °C) 73 °F (23 °C) 180 °F (82 °C)
⁄8 870 (6.00) 495 (3.41) 1345 (9.28) 495 (3.41)
⁄4 752 (5.19) 420 (2.90) 1150 (7.93) 420 (2.90)
⁄16 660 (4.55) 370 (2.55) 1015 (7.00) 370 (2.55)
⁄8 620 (4.27) 345 (2.38) 945 (6.52) 345 (2.38)
⁄2 480 (3.31) 270 (1.86) 730 (5.03) 270 (1.86)
⁄8 and larger 475 (3.27) 265 (1.83) 720 (4.97) 265 (1.83)
A
The fiber stresses used to derive these test pressures are:
at 73 °F (23 °C) 1900 psi (13.10 MPa) for a 1250 psi HDB material and 2900 psi (20.0 MPa) for a 1600 psi HDB material
at 180 °F (82 °C) 1065 psi (7.33 MPa)
6.5 Oxidative Resistance in Potable Chlorinated Water Applications—PE-RT tubing chlorine classification codes shall be
determined based on a minimum extrapolated time-to-failure of 50 years when tested and evaluated in accordance with 7.8 and
Table 7.
TABLE 7 Oxidative Resistance Classification Codes
Standard CL1 CL2 CL3 CL4 CL5
Usage 75% at Reserved 50% at 73 °F Reserved 100%
Ratios 73 °F and for future and for future at
25 % at use 50 % at use 140 °F
140 °F 140 °F
F2769 − 24
6.6 Bent Tube—The following requirement applies to tubing up to 1 in. nominal diameter. Bent tubing, with a radius of 6 times
the outside diameter and consisting of a continuous bend length inducing not less than 90° angle, shall meet the 180 °F (82.2 °C)
minimum hydrostatic sustained pressure strength requirements shown in Table 5 when tested in accordance with 7.9. The bend
length and bend angle is kept throughout the testing period by rigid secures immediately outside the bend. The minimum test
duration shall be 1000 h without failure.
NOTE 3—PE-RT tubing, larger than 1 in. nominal diameter, is typically installed as main distribution lines and is installed in straight runs. Fittings are
used when a change in direction of 90° or greater and a bend radius of less than 6 times the outside diameter is needed. The test requirements in 6.7 are
intended to evaluate PE-RT tubing installed in tight bend applications in accordance with the procedure in Appendix X3. This application applies to tubing
up to and including 1 in. nominal diameter only.
6.7 Excessive Temperature Hydrostatic Sustained— Tubing and fittings, when tested as assemblies, shall not fail in less than 720
h when tested in accordance with 7.10. If present, valves shall be tested in the open or unrestricted position.
NOTE 4—Tests applicable to tubing and fitting assemblies (6.3, 6.4, 6.7, and 6.12.3) are intended to be performance qualification tests of joints and not
tests required of each fitting configuration.
6.8 Environmental Stress Cracking—There shall be no loss of pressure in the tubing, when tested in accordance with 7.11.
6.9 Adhesion Test—Tubing that incorporates an optional inner, middle or outer layer shall not show any delamination when tested
in accordance with 9.3.1 of Specification F1282.
6.10 Slow Crack Growth Resistance—The slow crack growth resistance of the tubing material shall not be less than 500 h when
tested in accordance with 7.12.
6.11 Joints-Fusion:
6.11.1 Tubing may be fusion joined using Specification F1055 electrofusion fittings, Specification D2683 socket fusion fittings or
Specification D3261 butt heat fusion fittings. The tubing manufacturer shall indicate the recommended fitting types for use with
their tubing as indicated in Section 9.
6.11.2 Tubing with external barrier layers shall only be joined by fusion if recommended by the tubing manufacturer and tubing
is prepared so as to completely remove the barrier layer within the fusion zone per the tubing manufacturer’s recommendations.
Tubing with mid-wall barrier layers shall not be joined with fusion fittings.
NOTE 5—An external barrier layer will compromise electrofusion or socket fusion joining if not completely removed. A mid-wall barrier layer will
compromise butt fusion joining. Exposure of the a mid-wall barrier layer to the transported fluid may degrade the layer performance.
6.11.3 Electrofusion:
6.11.3.1 Electrofusion joints between tubing and Specification F1055 fittings shall be made in accordance with Practice F1290 and
the fitting manufacturer’s instructions.
6.11.3.2 Qualification of the fitting with PE-RT tubing shall be performed in accordance with 6.3, 6.4 and Specification F1055.
6.11.4 Socket Fusion:
6.11.4.1 Socket fusion joints between tubing and Specification D2683 fittings shall be made in accordance with Practice F2620
and the fitting manufacturer’s instructions.
6.11.4.2 Qualification of Specification D2683 fittings with PE-RT shall be performed in accordance with 6.3, 6.4.
6.11.5 Butt Heat Fusion:
F2769 − 24
6.11.5.1 Butt fusion joints between tubing and Specification D3261 fittings shall be made in accordance with Practice F2620 and
the fitting manufacturer’s instructions.
6.11.5.2 Qualification of the fitting with PE-RT shall be performed in accordance with 6.3, 6.4.
6.12 Joints - Mechanical Insert:
6.12.1 Mechanical insert fittings shall be installed in accordance with the fitting manufacturer’s installation instructions.
6.12.2 Qualification of the fitting with PE-RT tubing in accordance with 6.3, 6.4, 6.7, and 6.12.3.
6.12.3 Thermo-cycling—Tubing and mechanical insert joint system components, assembled using the system component
manufacturer’s instructions, shall not leak after completion of 1000 cycles between the temperatures of 60 °F (16 °C) and 180 °F
(82 °C) when tested in accordance with 7.7.
NOTE 6—Tests applicable to tubing and fittings assemblies are intended to be performance qualification tests of joints and not tests required of each fitting
configuration.
7. Test Methods
7.1 Conditioning—Condition the specimens at 73.4 °F 6 3.6 °F4 °F (23 °C 6 2 °C) and 50 % 6 510 % relative humidity for not
less than 40 h prior to test in accordance with Procedure A of Practice D618, for those tests where conditioning is required. In cases
of disagreement, the tolerances shall be 6 1.8 °F (61 °C) and 6 2 % relative humidity.
7.2 Test Conditions—Conduct the test in the standard laboratory atmosphere of 73.4 °F 6 3.6 °F (23 °C 6 2 °C) and 50 % 6 5
% relative humidity, unless otherwise specified in the test methods or in this specification. In cases of disagreement, the tolerances
shall be 61.8 °F (61 °C) and 62 % relative humidity.
7.3 Sampling—A sufficient quantity of tubing or fittings, as agreed upo
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