ASTM F2735-08
(Specification)Standard Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing
Standard Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing
SCOPE
1.1 This specification establishes requirements for sulfone plastic insert fittings and copper crimp rings for three sizes
( ½, ¾, and 1) of cross-linked polyethylene (PEX) and polyethylene of raised temperature (PE-RT) plastic tubing. These fittings are intended for use in 100 psi (690 kPa) cold- and hot-water distribution systems operating at temperatures up to and including 180°F (82°C). Included are the requirements for material, molded part properties, performance, workmanship, dimensions, and markings to be used on the fittings and rings.
1.2 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.
1.3 The following is an index of the appendix in this specification. GO/NO-GO Crimp GaugesAppendix X1
1.4 The following precautionary caveat pertains only to the test method portions, Sections 11 and 12, 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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Standards Content (Sample)
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Designation: F 2735 – 08a
Standard Specification for
Plastic Insert Fittings For SDR9 Cross-linked Polyethylene
(PEX) and Polyethylene of Raised Temperature (PE-RT)
Tubing
This standard is issued under the fixed designation F 2735; 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* F 412 Terminology Relating to Plastic Piping Systems
F 876 Specification for Crosslinked Polyethylene (PEX)
1.1 This specification establishes requirements for sulfone
Tubing
plastic insert fittings and copper crimp rings for three sizes
F 877 Specification for Crosslinked Polyethylene (PEX)
1 3
( ⁄2 , ⁄4 , and 1) of cross-linked polyethylene (PEX) and
Plastic Hot- and Cold-Water Distribution Systems
polyethylene of raised temperature (PE-RT) plastic tubing.
F 1498 Specification for Taper Pipe Threads 60° for Ther-
These fittings are intended for use in 100 psi (690 kPa) cold-
moplastic Pipe and Fittings
and hot-water distribution systems operating at temperatures
F 1807 Specification for Metal Insert Fittings Utilizing a
up to and including 180°F (82°C). Included are the require-
Copper Crimp Ring for SDR9 Cross-linked Polyethylene
mentsformaterial,moldedpartproperties,performance,work-
(PEX) Tubing
manship, dimensions, and markings to be used on the fittings
F 2623 Specification for Polyethylene of Raised Tempera-
and rings.
ture (PE-RT) SDR 9 Tubing
1.2 Units—The values stated in inch-pound units are to be
2.2 ASME Standard:
regarded as standard. The values given in parentheses are
B1.20.1 Pipe Threads General Purpose Inch
mathematical conversions to SI units that are provided for
2.3 NSF International Standard
information only and are not considered standard.
NSF/ANSI Standard No, 14 for Plastic Piping Components
1.3 The following is an index of the appendix in this
and Related Materials
specification.
NSF/ANSI Standard No. 61 for Drinking Water System
GO/NO-GO Crimp Gauges Appendix X1
Components-Health Effects
1.4 The following precautionary caveat pertains only to the
test method portions, Sections 11 and 12, of this specification. 3. Terminology
This standard does not purport to address all of the safety
3.1 Definitions—Definitions are in accordance with Termi-
concerns, if any, associated with its use. It is the responsibility
nology F 412 and abbreviations are in accordance with Termi-
of the user of this standard to establish appropriate safety and
nology D 1600, unless otherwise indicated.
health practices and determine the applicability of regulatory
4. Classification
limitations prior to use.
4.1 This specification governs one class of fittings and
2. Referenced Documents
1 3
copper crimp rings suitable for use with nominal size ⁄2 , ⁄4 ,
2.1 ASTM Standards:
and 1 size PEX tubing that meets the requirements of Speci-
D 1600 Terminology for Abbreviated Terms Relating to
fications F 876 and polyethylene of raised temperature (PE-
Plastics
RT) tubing that meets the requirements of Specification
D 2122 Test Method for Determining Dimensions of Ther-
F 2623.
moplastic Pipe and Fittings
5. Ordering Information
D 6394 Specification for Sulfone Plastics (SP)
5.1 Material—Fittingsshallbemoldedfromsulfoneplastic
(SP) as specified in Specification D 6394.The material shall be
This test method is under the jurisdiction of ASTM Committee F17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.
Current edition approved Nov. 1, 2008. Published November 2008. Originally
approved in 2008. Last previous edition approved in 2008 as F2735–08. Available from American Society of Mechanical Engineers (ASME), ASME
For referenced ASTM standards, visit the ASTM website, www.astm.org, or International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.asme.org.
Standards volume information, refer to the standard’s Document Summary page on Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd.,Ann
the ASTM website. Arbor, MI 48113-0140, http://www.nsf.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.
F 2735 – 08a
unreinforced polyphenylsulfone (group 03, class 1, grade 2) or 5.3 Crimp Rings—Crimp rings shall be manufactured and
an unreinforced blend of polyphenylsulfone and polysulfone marked in accordance with the requirements of Specification
(group 01, class 1, grade 2) with the polyphenylsulfone F 1807.
continuous phase comprising 55 to 80 % of the blend. Fittings
shall be made from virgin plastic or reworked plastic in
6. Molded Part Properties
accordance with 5.1.2.
6.1 Insert Crush—The fitting insert shall not crack, split, or
5.1.1 Since fittings specified by this standard will be used in
shatter when tested in accordance with 12.1.
hot-and-cold water plumbing systems, a material used to
6.2 Splay—The molded part shall be free of visible splay
manufacture fittings in accordance with this specification must
excepting some slight blushing at the gate location.
demonstrate qualities consistent with that application in addi-
tion to the performance requirements of this specification.
7. Performance Requirements
Those qualifying characteristics include, but are not limited to,
7.1 General—All performance tests shall be performed on
an established hydrostatic design basis (HDB) or stress design
assemblies of fittings, crimp rings, and PEX tubing. Fittings
basis (SDB) in accordance with PPI TR-3 or similar rating and
and crimp rings shall meet the material and dimensional
a demonstration of resistance to the long-term effects of those
requirements of this standard. PEX tubing shall meet the
chemicals normally found in potable water at the maximum
requirements of Specification F 876. Assembly of test speci-
temperature stated in this specification.
mens shall be in accordance with Section 10. Use separate sets
5.1.2 Rework Material—Clean rework material of the same
of assemblies for each performance test requirement.
commercial designation, generated from the manufacturer’s
7.2 ThefollowingsectionsofSpecificationF 877constitute
own production may be used by the same manufacturer,
a part of this specification:
provided the fittings meet all of the requirements of this
7.2.1 Hydrostatic Burst,
specification. Reworked material shall not be introduced at a
7.2.2 Hydrostatic Sustained Pressure Strength,
ratio exceeding 25 %.
7.2.3 Thermocycling,
5.2 Potable Water Requirements—Products intended for the 7.2.4 Excessive Temperature-Pressure Capability, and
transport of potable water shall be evaluated, tested and
7.2.5 Test Methods.
certified for conformance with NSF/ANSI Standard No. 61 or
7.3 In addition, when a section with a title identical to that
the health effects portion of NSF/ANSI Standard No. 14 by an referenced in 7.2 appears in this specification, it contains
acceptable certifying organization when required by the regu-
additional requirements that supplement those appearing in
latory authority having jurisdiction. Specification F 877.
A B
AB L H W G T R Maximum
Flash
and Mismatch
Size Outside Minimum Insert Minimum Number Rib Width Gap Width Minimum Minimum Total on
C D
(in.) Diameter ID Length Rib Height of Ribs Type Type Wall Radius Crest
EF
Diameter
⁄2 0.471 6 .004 0.315 0.480 6 .004 0.011 2 0.02- 0.04 0.1146.004 0.059 0.03 0.005
⁄4 0.667 6 .004 0.490 0.480 6 .004 0.011 2 0.02- 0.04 0.1146.004 0.067 0.03 0.005
1 0.856 6 .004 0.645 0.480 6 .004 0.011 2 0.02- 0.04 0.1146.004 0.084 0.03 0.005
A
The minimum ID shall be maintained through the insert length and into the fitting, intersecting and minimum ID of the other fitting.
B
Fitting shall be designed with sufficient overall dimensions to allow proper use of crimp tool without interference with previously completed crimps on the same fitting.
C
Lead chamfer area is not considered rib.
D
Applies to entire fitting and not just insert area.
E
The maximum flash and mismatch at the root diameter between the ribs may not exceed 30% of rib height
F
The total flash and mismatch is assumed to be the difference between the dimensions X and Y (See Fig. 2a.) These dimensions may be measured with appropriate
callipers or micrometres. See Fig. 2b for a graphic definition of flash and mismatch created by imperfection in die half interfaces.
FIG. 1 Fitting Insert Dimensions and Tolerances
F 2735 – 08a
TABLE 1 Crimp Ring D
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