ASTM F1974-00a
(Specification)Standard Specification for Metal Insert Fittings for Polyethylene/Aluminum/Polyethylene and Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Composite Pressure Pipe
Standard Specification for Metal Insert Fittings for Polyethylene/Aluminum/Polyethylene and Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Composite Pressure Pipe
SCOPE
1.1 This specification covers metal insert fittings with split ring and compression nut (compression joint) and metal insert fittings with copper crimp rings (crimp joint) for four sizes of composite pressure pipe. These fittings are intended for use in 125 psi (690 kPa) cold- and hot-water distribution systems operating at temperatures up to and including 180o F (82oC). (When used in polyethylene/aluminum/polyethylene systems the maximum operating temperature is limited by the pipe to 140 F (60oC) and where applicable 180oF (82oC)). Included are the requirements for materials, workmanship, burst pressure, sustained pressure, excessive temperature and pressure, temperature cycling tests, and markings to be used on the fittings and rings. The fittings covered by this specification are intended for use in potable water distribution systems for residential and commercial applications, water service, underground irrigation systems, and radient panel heating systems, baseboard, snow- and ice-melt systems, and gases that are compatible with the composite pipe and fittings.
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.
Note 1—The tables show the "nominal size" in millimetres with the inch size in parentheses. This exception is made to harmonize the "nominal size" with the two pipe standards, F1281 and F1281.
1.3 The following precautionary caveat pertains only to the test method portion, Section 9, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: F 1974 – 00a
Standard Specification for
Metal Insert Fittings for Polyethylene/Aluminum/
Polyethylene and Crosslinked Polyethylene/Aluminum/
Crosslinked Polyethylene Composite Pressure Pipe
This standard is issued under the fixed designation F 1974; 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 B 283 Specification for Copper and Copper-Alloy Die Forg-
ings (Hot-Pressed)
1.1 This specification covers metal insert fittings with split
B 584 Specification for Copper Alloy Sand Castings for
ring and compression nut (compression joint) and metal insert
General Applications
fittings with copper crimp rings (crimp joint) for composite
D 618 Practice for Conditioning Plastics and Electrical
pressure pipe. These fittings are intended for use in 125 psi
Insulating Materials for Testing
(690 kPa) cold- and hot-water distribution systems operating at
D 1598 Test Method for Time-To-Failure of Plastic Pipe
temperatures up to and including 180 °F (82 °C). (When used
Under Constant Internal Pressure
in polyethylene/aluminum/polyethylene systems the maximum
D 1599 Test Method for Short-Time, Hydraulic Failure
operating temperature is limited by the pipe to 140 °F (60 °C)).
Pressure of Plastic Pipe, Tubing and Fittings
Included are the requirements for materials, workmanship,
D 1600 Terminology for Abbreviated Terms Relating to
burst pressure, sustained pressure, excessive temperature and
Plastics
pressure, temperature cycling tests, and markings to be used on
D 2122 Test Method for Determining Dimensions of Ther-
the fittings and rings.
moplastic Pipe and Fittings
1.2 The values stated in inch-pound units are to be regarded
D 2240 Test Method for Rubber Property Durometer Hard-
as the standard. The SI values stated in parentheses are
ness
provided for information purposes.
E 18 Test Methods for Rockwell Hardness and Superficial
NOTE 1—The tables show the “nominal size” in millimetres with the 7
Hardness of Metallic Materials
inch size in parentheses. This exception is made to harmonize the
F 412 Terminology Relating to Plastic Piping Systems
“nominal size” with the two pipe standards, F 1281 and F 1282.
F 1281 Specification for Crosslinked Polyethylene/
1.3 The following precautionary caveat pertains only to the
Aluminum/Crosslinked Polyethylene (PEX/AL/PEX)
test method portion, Section 9, of this specification. This
Pressure Pipe
standard does not purport to address all of the safety concerns,
F 1282 Specification for Polyethylene/Aluminum/
if any, associated with its use. It is the responsibility of the user
Polyethylene (PE/AL/PE) Composite Pressure Pipe
of this standard to establish appropriate safety and health
2.2 ANSI Standards:
practices and determine the applicability of regulatory limita-
B1.20.1 Pipe Threads General Purpose (Inch)
tions prior to use.
B16.18 Cast Copper Alloy Solder Joint Pressure Fittings
B16.22 Wrought Copper and Copper Alloy Solder Joint
2. Referenced Documents
Pressure Fittings
2.1 ASTM Standards:
2.3 Manufacturers Standardization Society Standard:
B 16 Specification for Free-Cutting Brass Rod, Bar, and 9
SP-104 Wrought Copper LW Solder Joint Pressure Fittings
Shapes for Use in Screw Machines
2.4 National Sanitation Foundation (NSF) Standards:
B 62 Specification for Composition Bronze or Ounce Metal
Standard No. 14 for Plastic Piping Components and Related
Castings 9
Materials
B 75 Specification for Seamless Copper Tube
B 140 Specification for Copper-Zinc-Lead (Leaded Red
Brass or Hardware Bronze) Rod, Bar, and Shapes 3
Annual Book of ASTM Standards, Vol 02.02.
B 159 Specification for Phosphor Bronze Wire
Annual Book of ASTM Standards, Vol 08.04.
Annual Book of ASTM Standards, Vol 08.01.
Annual Book of ASTM Standards, Vol 09.01.
1 7
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Annual Book of ASTM Standards, Vol 03.01.
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings. Available from American National Standards Institute, 11 W. 42nd St., 13th
Current edition approved Oct. 10, 2000. Published January 2001. Originally Floor, New York, NY 10036.
published as F 1974 - 99. Last previous edition F 1974 - 00. Available from NSF International, P.O. Box 130140, Ann Arbor, MI
Annual Book of ASTM Standards, Vol 02.01. 48113–0140.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
F 1974
Standard No. 61 for Drinking Water System Components - assemblies of fittings and PEX/AL/PEX pipe. Fittings, split
Health Effects rings and crimp rings shall meet the material and dimensional
requirements of this standard. PEX/AL/PEX pipe shall meet
3. Terminology
the requirements of Specification F 1281. Assembly of test
3.1 Definitions are in accordance with Terminology F 412
specimens shall be in accordance with either 8.1 or 8.2, as
and abbreviations are in accordance with Terminology D 1600,
applicable. Each assembly shall contain at least one joint. Use
unless otherwise indicated.
separate sets of assemblies for each performance test require-
ment.
4. Classification
6.2 Hydrostatic Burst—Assemblies shall meet the mini-
4.1 This specification covers two classes of fittings, fittings
mum hydrostatic burst requirements shown in Table 1 when
with split ring and compression nut and fittings with a copper
tested in accordance with 9.5.
crimp ring, suitable for use with PEX/AL/PEX or PE/AL/PE
6.3 Hydrostatic Sustained Pressure Strength—Pipe and fit-
pipe that meets the requirements of Specifications F 1281 and
ting assemblies shall not separate or leak when tested in
F 1282 respectively.
accordance with 9.6.
5. Materials and Manufacture
6.4 Thermocycling—Assemblies shall not leak or separate
when thermocycled 1000 cycles between the temperatures of
5.1 Fittings—The fittings shall be made from one of the
60 °F (16 °C) and 180 °F (82 °C) in accordance with 9.7.
following metals.
6.5 Excessive Temperature-Pressure Capability—
5.1.1 Wrought Copper Fittings—Wrought copper fittings
Assemblies shall not leak or separate when tested in accor-
shall be made from material meeting the requirements of
dance with 9.8.
Specification B 75 for one of the following coppers: copper
UNS C10200, C10300, C10800, C12000, or C12200.
7. Dimensions
5.1.2 Cast Copper Alloy Fittings—Cast copper alloy fittings
7.1 Dimensions and Tolerances—The dimensions and tol-
shall be made from material meeting the requirements of
erances of fittings, split rings and crimp rings shall be as shown
Specification B 584, copper alloy UNS C84400, C85700,
in Figs. 1-3 when measured in accordance with 9.4.
C85710, or Specification B 62, copper alloy UNS C83600.
7.1.1 Alignment—The maximum angular variation of any
When fittings are assembled with copper insert fittings, the
opening shall not exceed 1° off the true centerline axis.
insert fittings shall comply with 5.1.1.
7.1.2 Fittings with Solder Joint Ends—Solder joint ends
5.1.3 Cast Copper Alloy Valves—Cast copper alloy valves
shall be in accordance with ANSI B16.22, ANSI B16.18, or
shall be made from material meeting the requirements of
MSS SP-104.
Specification B 62 copper alloy UNS C83600 or Specification
7.1.3 Tapered Threaded Ends—Fitting threads shall be
B 584 copper alloy UNS C83800 or C84400. When valves are
right-hand conforming to ANSI/ASME B1.20.1. They shall be
assembled with copper insert fittings, the insert fittings shall
taper threads (NPT).
comply with 5.1.1.
5.1.4 Machined Brass Fittings—Machined brass fittings
8. Workmanship, Finish and Appearance
shall be made from material meeting the requirements of
8.1 The sealing surfaces of the insert shall be smooth and
Specification B 140 copper alloy UNS C31400 or Specification
free of foreign material. The fitting walls shall be free of
B 16 copper alloy UNS C36000, or Specification B 62, copper
cracks, holes, blisters, voids, foreign inclusions or other defects
alloy UNS C83600.
that are visible to the naked eye and that affect the wall
5.1.5 Forged Brass Fittings—Forged brass fittings shall be
integrity.
made from material meeting the requirements of Specification
8.1.1 Assembly—Insert fittings shall be joined to PE/AL/PE
B 283, copper alloy UNS No. C37700 or Specification B 124,
or PEX/AL/PEX pipe by the use of either a crimp joint or a
Alloy UNS No. C37700.
compression joint.
5.2 Crimp Rings—Crimp rings shall be made from copper
8.1.2 Crimp Joints—Crimp insert fittings shall be joined to
UNS C10200, C12000, or C12200. The crimp rings shall have
PE/AL/PE or PEX/AL/PEX pipe by the compression of a
a minimum allowable hardness of 35 and a maximum allow-
copper crimp ring around the outer circumference of the pipe
able hardness of 45 on the Rockwell 15T scale when measured
forcing the pipe material into annular spaces formed by ribs on
according to Test Methods E 18.
the fitting. The dimensions and out-of-roundness of the crimp
5.3 Split Rings—Split rings shall be made from material
meeting the requirements of Specification B 140 copper alloy
UNS C31400, or Specification B 16 copper alloy UNS TABLE 1 Minimum Hydrostatic Burst Strength Requirements for
Fitting and PEX/AL/PEX Pipe Assemblies
C36000, or Specification B 159 copper alloy UNS C51000.
5.4 The O-rings used on the brass fittings to make a static Nominal Pipe Size, Minimum Burst Pressures
mm (in.) at Different Temperatures
seal shall be manufactured from ethylene propylene rubber
psi at (kPa at psi at (kPa at
(EPDM) or silicone ribber (Si), with a Shore A durometer
73.4° F 23 °C) 180 °F 82.2 °C)
between 60 and 70 when tested in accordance with ASTM
1216 ( ⁄2) 870 (6 000) 580 (4 000)
Standard D 2240.
1620 ( ⁄8) 725 (5 000) 550 (3 800)
2025 ( ⁄4) 580 (4 000) 465 (3 200)
6. Performance Requirements
2532 (1) 580 (4 000) 465 (3 200)
6.1 General—All performance tests shall be performed on
F 1974
FIG. 1 Joint Fitting Dimensions
ring after it has been crimped shall be in accordance with Table fitting or pipe stop. Position and compress the split ring by
2. tightening the compression nut onto the insert fitting.
8.1.2.1 Crimping Procedure—To affix the insert fitting to
9. Test Methods
the pipe with the crimp ring, the crimping procedure shall be as
follows: slide the crimp ring onto the pipe, insert the ribbed end 9.1 Conditioning—Condition specimens at 73 64°F(23 6
of the fitting into the end of the pipe until the pipe contacts the 2 °C) and 506 5 % relative humidity for not less than 4 h prior
shoulder of the fitting or pipe stop. The crimp ring shall then be to testing. Use Test Method D 618 to the extent possible as a
1 1
positioned on the pipe so the edge of the crimp ring is ⁄8 to ⁄4 guide to other conditions.
in. (3.2 to 6.4 mm) from the end of the pipe. The jaws of the 9.2 Test Conditions—Conduct the tests in the standard
crimping tool shall be centered over the crimp ring and the tool laboratory atmosphere at 73 6 4°F(23 6 2 °C) and 50 6 5%
shall be held so that the crimping jaws are perpendicular to the relative humidity unless otherwise specified in the test methods
axis of the barb. The jaws of the crimping tool shall be closed or in this specification.
around the crimp ring, compressing the crimp ring onto the 9.3 Sampling—Take a sample of the fittings, crimp rings
pipe. The crimp ring shall not be crimped more than once. Each and PEX/AL/PEX pipe sufficient to determine conformance
crimp shall be checked to determine conformance to the after with this specification at random.
crimped dimensional requirements of Table 2. 9.4 Dimensions—Any randomly selected fitting or fittings
8.2 Compression Joints—Compression insert fittings shall and crimp ring or crimp rings shall be used to determine
be joined to PE/AL/PE or PEX/AL/PEX pipe through the dimensions. Make measurements in accordance with Test
compression of a split ring, by an compression nut, around the Method D 2122. Determine the diameters by making measure-
outer circumference of the pipe forcing the pipe material into ments at four locations spaced at approximately 45° apart
the annular space formed by ribs on the fitting. around the circumference. Inspection and gauging of solder
8.2.1 Compression Jointing Procedure—To affix the insert joint ends shall be in accordance with ANSI B16.18, ANSI
fitting to the pipe with the split ring, and compression nut the B16.22, or MSS SP-104.
procedure shall be as follows: slide the compression nut and 9.5 Burst Pressure—Determine the minimum burst pressure
split ring onto the pipe, insert the ribbed end of the fitting into in accordance with Test Method D 1599 on at least six joint
the end of the pipe until the pipe contacts the shoulder of the asemblies, for each temperature in Table 1. The six joint
F 1974
FIG. 2 Joint Fitting Dimensions
FIG. 3 Joint Fitting Dimensions
assemblies are contained in a single specimen. Leakage or 9.6 Hydrostatic Sustained Pressure—Perform the test on at
separation at any of the joints tested at less than the minimum least six assemblies in accordance with Test Method D 1598,
burst requirements for the temperatures specified in Table 1, except for the following:
shall constitute a failure in this test. 9.6.1 Test temperature shall be at 180 6 4°F(82 6 2 °C).
F 1974
TABLE 2 Crimp Ring Dimensions After Crimping on Pipe/Fitting
leaks. Any evidence of leakage at the fittings or separation of
Assembly
the fittings from the pipe constitutes failure.
1 5 3
Dimension 1216 ( ⁄2 in.) 1620 ( ⁄8 in.) 2025 ( ⁄4 in.) 2532 (1 in.)
9.7.4.2 If no failures are evident, the specimen assembly
Final Crimped 0.705 0.854 1.039 1.307
shall immediately be tested for joint integrity (hydrostatic
A,B
Outside Diameter 6 0.008 6 0.008 6 0.008 6 0.008
burst) at 73° F (23 °C) in accordance with Test Method D 1599.
A
For all diameters except for the area of scoring caused by the crimping tool.
B
Leakage or separation during the hydrostatic burst test of any
The maximum out-of-roundness as measured by the difference between the
minimum crimped outside diameter and the maximum crimped outside diameter
of the joints in the assembly at less than the pressure shown in
shall not exceed 0.006 in. (0.150 mm).
Table 1 shall constitute failure of this test.
9.7.5 Interpretation of Results—Failure of any one of six
9.6.2 Test pressure shall be 320 psi (2 205 kPa).
specimens in the assembly shall constitute failure of this test.
9.6.3 The external test environm
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