ASTM F1960-00

Standard Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) Tubing

SCOPE
1.1 This specification covers cold expansion fittings and cross-linked (PEX) reinforcing rings for use with cross-linked polyethylene (PEX) plastic tubing in 3/8, 1/2, 5/8, 3/4, and 1-in. nominal diameters. These fittings are intended for use in 100 psi (690 kPa) cold- and hot-water distribution systems operating at temperatures up to and including 180oF (82oC). The system is comprised of a PEX reinforcing ring and a cold expansion fitting. Included are the requirements for materials, workmanship, dimensions, burst pressure, sustained pressure, excessive temperature and pressure, termperature cycling tests, and markings to be used on the fitting components. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems as well as sealed central heating, including under-floor-heating systems.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values stated in parentheses are provided for information purposes.
1.3 The following precautionary caveat pertains only to the test method portion, Section 10, 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-2000
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.10 - Fittings

Relations

• Replaced By: ASTM F1960-00e1 - Standard Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) Tubing
• Effective Date: 10-Apr-2000
• Referred By: ASTM F877-23 - Standard Specification for Crosslinked Polyethylene (PEX) Hot- and Cold-Water Distribution Systems
• Effective Date: 10-Apr-2000
• Referred By: ASTM F2769-23a - Standard Specification for Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems
• Effective Date: 10-Apr-2000
• Referred By: ASTM D2846/D2846M-19a - Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems
• Effective Date: 10-Apr-2000
• Referred By: ASTM F2735-23 - Standard Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing
• Effective Date: 10-Apr-2000
• 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: 10-Apr-2000
• Referred By: ASTM F3253-23 - Standard Specification for Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier for Hot- and Cold-Water Hydronic Distribution Systems
• Effective Date: 10-Apr-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 1960 – 00 An American National Standard
Standard Specification for
Cold Expansion Fittings with PEX Reinforcing Rings for Use
with Cross-linked Polyethylene (PEX) Tubing
This standard is issued under the fixed designation F 1960; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 618 Practice for Conditioning Plastics and Electrical
Insulating Materials For Testing
1.1 This specification covers cold expansion fittings and
D 792 Test Methods for Density and Specific Gravity (Rela-
cross-linked (PEX) reinforcing rings for use with cross-linked
3 1 5 3 1 tive Density) of Plastics by Displacement
polyethylene (PEX) plastic tubing in ⁄8, ⁄2, ⁄8, ⁄4,1,1- ⁄4, and
1 D 1505 Test Method for Density of Plastics by the Density-
1- ⁄2in. nominal diameters. These fittings are intended for use
Gradient Technique
in 100 psi (690 kPa) cold- and hot-water distribution systems
D 1598 Test Method for Time-to-Failure of Plastic Pipe
operating at temperatures up to and including 180°F (82°C).
Under Constant Internal Pressure
The system is comprised of a PEX reinforcing ring and a cold
D 1599 Test Method for Short-Time Hydraulic Failure Pres-
expansion fitting. Included are the requirements for materials,
sure of Plastic Pipe, Tubing, and Fittings
workmanship, dimensions, burst pressure, sustained pressure,
D 1600 Terminology for Abbreviated Terms Relating to
excessive temperature and pressure, temperature cycling tests,
Plastics
and markings to be used on the fitting components. The
D 2122 Test Method for Determining Dimensions of Ther-
components covered by this specification are intended for use
moplastic Pipe and Fittings
in residential and commercial, hot and cold, potable water
D 2765 Test Methods for Determination of Gel Content and
distribution systems as well as sealed central heating, including
Swell Ratio of a Crosslinked Ethylene Plastics
under-floor-heating systems.
D 3045 Practice for Heat Aging of Plastics Without Load
1.2 The values stated in inch-pound units are to be regarded
F 412 Terminology Relating to Plastic Piping Systems
as the standard. The SI values stated in parentheses are
F 876 Specification for Crosslinked Polyethylene (PEX)
provided for information purposes.
Tubing
1.3 The following precautionary caveat pertains only to the
F 877 Specification for Crosslinked Polyethylene (PEX)
test method portion, Section 10, of this specification: This
Plastic Hot and Cold-Water Distribution Systems
standard does not purport to address all of the safety concerns,
2.2 Military Standard:
if any, associated with its use. It is the responsibility of the user
MIL-STD-P46120A Polysulfone GF120
of this standard to establish appropriate safety and health
2.3 ANSI Standard:
practices and determine the applicability of regulatory limita-
B1.20 Pipe Threads General Purpose
tions prior to use.
B16.18 Cast Copper Alloy Solder Joint Pressure Fittings
2. Referenced Documents
B16.22 Wrought Copper and Copper Alloy Solder Joint
Pressure Fittings
2.1 ASTM Standards:
2.4 NSF Standards:
B 16 Specification for Free-Cutting Brass Rod, Bar, and
NSF 14 for Plastic Piping Components and Related Mate-
Shapes for Use in Screw Machines
rials
B 140/B 140M Specification for Copper-Zinc-Lead
NSF 61 for Drinking Water System Components-Health
(Leaded Red Brass or Hardware Bronze) Rod, Bar, and
Effects
Shapes
2.5 Manufacturers’ Standardization Society Standards:
B 283 Specification for Copper and Copper-Alloy Die Forg-
ing (Hot Pressed)
B 584 Specification for Copper Alloy Sand Castings for
Annual Book of ASTM Standards, Vol 08.01.
General Applications Annual Book of ASTM Standards, Vol 08.04.
Annual Book of ASTM Standards, Vol 08.02.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
This specification is under the jurisdiction of ASTM Committee F-17 on Plastic Robins Ave., Philadelphia PA 19111–5094, Attn: NPODS.
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings. Available from the American National Standards Institute, 11 West 42nd St.,
Current edition approved 10, 2000. Published 2000. Originally published as 13th Floor, New York, NY, 10036.
F 1960 – 99. Last previous edition F 1960 – 99. Available from the National Sanitation Foundation (NSF International), PO
Annual Book of ASTM Standards, Vol 02.01. Box 1468, Ann Arbor, MI, 48106.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
F 1960
SP 104 Wrought Copper Solder Joint Pressure Fittings 6.2.2 Hydrostatic Burst—Assemblies shall meet the mini-
mum hydrostatic burst requirements shown in Table 1 when
3. Terminology
tested in accordance with 10.5.
3.1 Definitions—Definitions are in accordance with Termi-
6.2.3 Hydrostatic Sustained Pressure Strength—Assemblies
nology F 412 and abbreviations are in accordance with Termi-
shall meet the hydrostatic sustained pressure requirements
nology D 1600, unless otherwise indicated.
shown in Table 2 when tested in accordance with 10.6.
3.1.1 PEX reinforcing rings—cross-linked polyethylene
6.2.4 Thermocycling—Assemblies shall not leak or separate
rings used to add contraction force around the cold expansion
when thermocycled 1000 cycles between the temperatures of
fittings.
60 and 180°F (16 and 82°C) when tested in accordance with
10.7.
4. Classification
6.2.5 Excessive Temperature Hydrostatic Sustained
4.1 This specification covers one class of cold expansion
Pressure—Assemblies shall have the ability to accommodate
fittings with PEX reinforcing rings suitable for use with PEX
the short-term conditions shown in Table 3 when tested in
tubing that meets the requirements of Specifications F 876 and
accordance with 10.8.
F 877.
7. Dimensions
5. Materials and Manufacture
7.1 Dimensions and Tolerances—The dimensions and tol-
5.1 Cold expansion fittings shall be made from one of the
erances of fittings and PEX reinforcing rings shall be as shown
following materials:
in Figs. 1 and 2 and Fig. 4 when measured in accordance with
5.1.1 Machined Brass—Machined brass fittings shall be
10.4.
made from material meeting the requirements of Specification
7.1.1 Alignment—The maximum angular variation of any
B 140 copper alloy UNS C31400 or Specification B 16 copper
opening shall not exceed 1° off the true centerline axis.
alloy UNS C36000.
7.1.2 Fittings with Solder Joint Ends—Solder joint ends
5.1.2 Forged Brass—Forged brass fittings shall be made
shall be in accordance with ANSI B16.22, ANSI B16.18 or
from material meeting the requirements of Specification B 283
MSS SP-104.
copper alloy UNS C37700 or UNS C89844.
7.1.3 Tapered Threaded Ends—Fitting threads shall be
5.1.3 Sand Casted Brass—Sand casted brass fittings shall
right-hand conforming to ANSI B1.20.1. They shall be taper
be made from material meeting the requirements of Specifica-
threads (NPT).
tion B 584 copper alloy UNS C84400 or other approved
material meeting the requirements of Specification B 584.
8. Workmanship, Finish and Appearance
5.1.4 20 % Glass-Filled Polysulfone—Glass-filled polysul-
8.1 The fittings shall be made from compounds that are
fone fittings shall be made from materials meeting the require-
homogeneous throughout. The sealing surfaces of the insert
ments of MIL-STD-P46120A Polysulfone GF120.
shall be smooth and free of foreign material. The fitting walls
5.2 Reinforcing rings shall be made from PEX material
shall be free of cracks, holes, blisters, voids, foreign inclusions,
meeting the performance requirements of 6.1.
or other defects that are visible to the naked eye and that affect
wall integrity.
6. Performance Requirements
6.1 PEX Reinforcing Rings:
9. Assembly
6.1.1 Density—When determined in accordance with 11.1,
9.1 Cold Expansion Joints—Fittings shall be joined to PEX
the PEX reinforcing rings shall have a density in the range
tubing by the contraction of the tubing and reinforcing ring
from 926 to 940 kg/m .
over the insert of the cold expansion fitting. Fittings and PEX
6.1.2 Degree of Cross-Linking—When tested in accordance
reinforcing rings shall meet the dimensional and material
with 11.2, the degree of cross-linking for PEX reinforcing rings
requirements of this standard. PEX tubing shall meet the
shall be within the range from 70 to 89 %, inclusive.
requirements of Specification F 876 or F 877.
6.1.3 Stabilizer Migration Resistance—When tested in ac-
9.2 Expansion Tool—The expansion tool shall expand the
cordance with 11.3, the time, t , shall be at least 50 % of the
PEX tubing and reinforcing ring to a maximum inside diameter
time, t .
6.2 System Performance Requirements:
TABLE 1 Minimum Hydrostatic Burst Strength Requirements for
6.2.1 General—All performance tests shall be performed on
Cold Expansion Fittings, PEX Reinforcing Ring and PEX Tubing
assemblies of fittings, PEX reinforcing rings and PEX tubing.
A
Assemblies
Fittings and reinforcing rings shall meet the material and
Minimum Burst Pressure at Different
Nominal Tubing Size, in. (mm)
dimensional requirements of this specification. PEX tubing
Temperatures, psi (kPa) and °F (°C)
shall meet the requirements of Specifications F 876 and F 877.
A A
psi at (kPa) at psi at (kPa) at
Assembly of test specimens shall be in accordance with 9.1.
in. (mm)
73.4°F (23°C) 180°F (82.2°C)
Each assembly shall contain at least two joints. Use separate
sets of assemblies for each performance test requirement. ⁄8 (10) 620 (4275) 275 (1896)
⁄2 (13) 480 (3309) 215 (1482)
⁄8 and larger (16 and larger) 475 (3275) 210 (1448)
A
Available from Manufacturers’ Standardization Society of the Valve and
The fiber stress used to derive this test pressure is 1900 psi (13.10 MPa) at
Fittings Industry 127 Park St. NE Vienna, VA 22180 73.4°F (23.0°C), and 850 psi (5.86 MPa) at 180°F (82.2°C).
F 1960
TABLE 2 Minimum Hydrostatic Sustained Strength Requirements
surements at four locations spaced at approximately 45° apart
for Cold Expansion Fittings, PEX Reinforcing Ring and PEX
around the circumference. Inspection and gaging of solder joint
A,B
Tubing Assemblies
ends shall be in accordance with ANSI B16.18, ANSI B16.22,
Pressure Required for Test at 180°F
Nominal Tubing Size, in. (mm) or MSS SP-104.
A
(82.2°C), psi (kPa)
10.5 Burst Pressure—Determine the minimum hydrostatic
⁄8 (10) 250 (1724)
burst strength for tubing and fitting assemblies for each
⁄2 (13) 195 (1344)
temperatures listed in Table 1 in accordance with Test Method
⁄8 and larger (16 and larger) 190 (1310)
D 1599, except as herein specified. Leakage or separation at
A
The fiber stress used to derive this test pressure is 770 psi (5.31 MPa) at 180°F
any of the joints tested at less than the minimum burst
(82.2°C).
B
Test duration is 1000 h.
requirements for the temperatures specified in Table 1 shall
constitute a failure in this test.
TABLE 3 Excessive Temperature and Pressure Requirements for 10.5.1 Procedure—Test a single specimen assembly, con-
Cold Expansion Fittings, PEX Reinforcing Ring and PEX Tubing
taining at least six joints prepared from tubing, fittings, and
Assemblies
reinforcing rings meeting the requirements of this specifica-
Hydrostatic Test Pressure Air Bath Temperature, °F
tion. Attach end closures and fill the specimen with water.
Test Duration
Air Bath, psi (kPa) (°C)
Condition in water at the test temperature for a minimum if 2
30 days 150 (1034) 210 (99)
h (or in air for a minimum of 4 h). For testing at 180°F (82°C),
fill the sample with water at a temperature of at least 120°F
(50°C) prior to conditioning.
as listed in Table 4. The expanded tubing shall be round to
10.5.1.1 Increase the internal pressure at a constant rate so
ensure uniform contraction of the tubing around the cold
as to reach the maximum burst requirement in 60 to 70 s.
expansion fitting. The expansion tool shall be inspected for
Leakage or separation at any of the fittings tested, at less than
wear according to the manufacturer’s instructions.
the minimum hydrostatic burst requirements for either tem-
9.3 Procedure:
perature specified in Table 1, shall constitute failure in this test.
9.3.1 Assembly of Connections—Affix the cold expansion
10.6 Hydrostatic Sustained Pressure—Perform the test on at
fitting to the PEX tubing by sliding the PEX reinforcing ring
least six assemblies in accordance with Test Method D 1598,
onto the tubing and positioning the ring so that the end of the
except for the following:
ring overhangs the end of the tubing a maximum of ⁄16 in. (1.6
10.6.1 Test temperature shall be 180 6 4°F (82 6 2°C),
mm). Insert the expansion head into the tubing as far as it will
10.6.2 The external test environment shall be air or water,
go. Holding the tool so that the centerline of the expansion
10.6.3 The specimens shall be filled with water at a tem-
head is approximately in line with the centerline of the tubing,
perature of at least 120°F (50°C), and
operate the tool until the tubing and reinforcing ring are fully
10.6.4 Leakage or separation at any joint tested at less than
expanded. After completing the expansion process, remove the
1000 h at the sustained pressure given in Table 2 shall
expansion tool and insert the cold expansion fitting until the
constitute failure in this test.
tubing hits the shoulder of the fitting or the tube stop. Hold the
10.7 Thermocycling:
fitting in place until the tubing contracts sufficiently to hold the
10.7.1 Summary of Test Method—This test method de-
fitting in place.
scribes a pass-fail test for thermally cycling assemblies com-
9.3.2 Improper Connections—If the insert fitting was not
prised of cold expansion fittings, PEX reinforcing rings and
fully inserted to its shoulder or tube stop or the reinforcing ring
PEX tubing over a critical temperature range for a selected
was not placed in accordance with 9.3.1, remove the tubing and
number of cycles while subjected to an internal pressure. The
ring from the fitting and trim 2 in. from the tubing. Using a new
test provides a measure of failure due to the combined effects
reinforcing ring, repeat the procedure in 9.3.1.
of differential thermal expansion and creep of connections
intended for use up to and including 180°F (82°C).
10. Test Methods
10.7.2 Apparatus—A pressure source capable of maintain-
10.1 Conditioning—Condition specimens at 73 6 4°F (23
ing an internal pressure of 100 6 10 psi (690 6 69 kPa) on the
6 2°C) and 50 6 5 % relative humidity for not less than 40 h
specimens is required. An immersion system shall consist of
prior
...