1、Designation: F2159 14 An American National StandardStandard Specification forPlastic Insert Fittings Utilizing a Copper Crimp Ring forSDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9Polyethylene of Raised Temperature (PE-RT) Tubing1This standard is issued under the fixed designation F2159; the n
2、umber immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Sco
3、pe*1.1 This specification establishes requirements for sulfoneplastic insert fittings and copper crimp rings for four sizes(38,12, and34 and 1) of cross-linked polyethylene (PEX)tubing that meet the requirements for Specification F876 andpolyethylene of raised temperature (PE-RT) tubing that meetthe
4、 requirements of Specifications F2623 and F2769. Thesefittings are intended for use in 100 psi (690 kPa) cold- andhot-water distribution systems operating at temperatures up toand including 180F (82C). Included are the requirements formaterial, molded part properties, performance, workmanship,dimens
5、ions, and markings to be used on the fittings and rings.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 The following is an
6、index of the appendix in thisspecification:GO/NO-GO Crimp Gauges Appendix X11.4 The following precautionary caveat pertains only to thetest method portions, Sections 11 and 12, of this specification.This standard does not purport to address all of the safetyconcerns, if any, associated with its use.
7、 It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatoryrequirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1598 Test Method for Time-to
8、-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD6
9、394 Specification for Sulfone Plastics (SP)F412 Terminology Relating to Plastic Piping SystemsF876 Specification for Crosslinked Polyethylene (PEX) Tub-ingF1498 Specification for Taper Pipe Threads 60 for Thermo-plastic Pipe and FittingsF1807 Specification for Metal Insert Fittings Utilizing aCopper
10、 Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) Tubing and SDR9 Polyethylene of Raised Tem-perature (PE-RT) TubingF2623 Specification for Polyethylene of Raised Temperature(PE-RT) SDR 9 TubingF2769 Specification for Polyethylene of Raised Temperature(PE-RT) Plastic Hot and Cold-Water Tubing and
11、Distri-bution Systems2.2 ASME Standard:B 1.20.1 Pipe Threads General Purpose Inch32.3 NSF International Standard:ANSI/NSF Standard No. 14 for Plastic Piping Componentsand Related Materials4ANSI/NSF Standard No. 61 for Drinking Water SystemComponents-Health Effects43. Terminology3.1 DefinitionsDefini
12、tions are in accordance with Termi-nology F412 and abbreviations are in accordance with Termi-nology D1600, unless otherwise indicated.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Curr
13、ent edition approved Aug. 1, 2014. Published September 2014. Originallyapproved 2001. Last previous edition approved in 2011 as F2159-11. DOI:10.1520/F2159-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
14、ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
15、Arbor, MI 48113-0140, http:/www.nsf.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recog
16、nized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14. Classification4.1 This specification governs one class of fit
17、tings andcopper crimp rings suitable for use with nominal size38,12 ,34and 1 size PEX tubing that meets the requirements of ASTMSpecifications F876 and PE-RT tubing that meets the require-ments of Specifications F2623 and F2769.5. Materials and Manufacture5.1 MaterialFittings shall be molded from su
18、lfone plastic(SP) as specified in Specification D6394. The material shall beunreinforced polysulfone (group 01, class 1, grades 1 or 2) orpolyphenylsulfone (group 03, class 1, grade 1 or 2) orunreinforced polyphenylsulfone/polysulfone blends (group 04,Class 1, grade 2) or reworked plastic in accorda
19、nce with 5.1.1.NOTE 1Since fittings specified by this standard will be used inhot-and-cold water plumbing systems, a material used to manufacturefittings in accordance with this specification must demonstrate qualitiesconsistent with that application in addition to the performance require-ments of t
20、his specification. Those qualifying characteristics include, butare not limited to, an established hydrostatic design basis (HDB) or stressdesign basis (SDB) in accordance with PPI TR-3 or similar rating and ademonstration of resistance to the long-term effects of those chemicalsnormally found in po
21、table water at the maximum temperature stated in thisspecification.5.1.1 Rework MaterialClean rework material of the samecommercial designation, generated from the manufacturersown production may be used by the same manufacturer,provided the fittings meet all of the requirements of thisspecification
22、. Reworked material shall not be introduced at aratio exceeding 25 %.5.2 Potable Water RequirementsProducts intended for thetransport of potable water shall be evaluated, tested andcertified for conformance with ANSI/NSF Standard No. 61 orthe health effects portion of ANSI/NSF Standard No. 14 by ana
23、cceptable certifying organization when required by the regu-latory authority having jurisdiction.5.3 Crimp RingsCrimp rings shall be manufactured andmarked in accordance with the requirements of SpecificationF1807.6. Molded Part Properties6.1 Insert CrushThe fitting insert shall not crack, split, or
24、shatter when tested in accordance with 12.1.6.2 SplayThe molded part shall be free of visible splayexcepting some slight blushing at the gate location.7. Performance Requirements7.1 GeneralAll performance tests shall be performed onassemblies of fittings, crimp rings, and PEX tubing or PE-RTtubing,
25、or both. Fittings and crimp rings shall meet the materialand dimensional requirements of this standard. PEX tubingshall meet the requirements of Specification F876. PE-RTtubing shall meet the requirements of Specifications F2623 andF2769.Assembly of test specimens shall be in accordance withSection
26、10. Use separate sets of assemblies for each perfor-mance test requirement.7.2 Hydrostatic BurstAssemblies shall meet the minimumhydrostatic burst requirements shown in Table 1, when testedin accordance with 11.5.7.3 Hydrostatic Sustained Pressure StrengthAssembliesshall meet the hydrostatic sustain
27、ed pressure requirementsshown in Table 2 when tested in accordance with 11.6.7.4 ThermocyclingAssemblies shall not leak or separatewhen thermocycled 1000 cycles between the temperatures of60F (16C) and 180F (82C) when tested in accordance with11.7.7.5 Excessive Temperature-Pressure Capability:7.5.1
28、GeneralAssemblies shall have adequate strength toaccommodate short-term conditions, 30 days (720 h) of 210 F(99 C) and 150 psi (1034 kPa) when tested in accordance with11.8.8. Dimensions8.1 Dimensions and TolerancesThe dimensions and toler-ances of fittings shall be as shown in Fig. 1, when measured
29、 inaccordance with 11.4.8.1.1 AlignmentThe maximum angular variation of anyopening shall not exceed 1 off the true centerline axis.8.1.2 Tapered ThreadsFitting threads shall be AmericanNational Standard Taper Pipe Thread Form conforming toSpecification F1498.8.1.3 Straight ThreadsStraight pipe threa
30、ds, intended forthe making of a gasketed seal with taper pipe threads, shall beNPSM and conform to ASME B 1.20.1.9. Workmanship, Finish, and Appearance9.1 The sealing surfaces of the insert shall be smooth andfree of foreign material. The fitting walls shall be free ofcracks, holes, blisters, voids,
31、 foreign inclusions, or otherdefects that are visible to the unaided eye and that affect thewall integrity.9.2 Except for the insert, the molded part shall be free offlash in excess of 0.005 in. Flash, mismatch, and witness markrequirements for the insert shall be in accordance with Fig. 1.10. Assem
32、bly10.1 Crimp JointsInsert fittings shall be joined to PEXtubing or PE-RT tubing by the compression of a copper crimpring around the outer circumference of the tubing forcing thetubing material into annular spaces formed by ribs on theTABLE 1 Minimum Hydrostatic Burst Strength Requirements forFittin
33、g, Crimp Ring, and PEX Tubing or PE-RT TubingAssembliesNominalTubing SizeMinimum Burst Pressures atDifferent Temperaturesin.psigAat73.4F(kPa) at(23C)psigAat180F(kPa) at(82.2C)38 620 (4275) 275 (1896)12 480 (3309) 215 (1482)34 andlarger475 (3275) 210 (1448)AThe fiber stress to derive this test pressu
34、re is: at 73.4F (23.0C) 1900 psi (13.10MPa) at 180F (82.2C) 850 psi (5.86 MPa).F2159 142fitting. Insert fittings and crimp rings shall meet the dimen-sional and material requirements of this standard. PEX tubingshall meet the requirements of Specifications F876. PE-RTtubing shall meet the requiremen
35、ts of Specifications F2623 andF2769. The dimensions and out-of-roundness of the crimp ringafter it has been crimped shall be in accordance with Table 3.10.1.1 Crimping ProcedureTo affix the insert fitting to thetubing with the crimp ring, the crimping procedure shall be asfollows: slide the crimp ri
36、ng onto the tubing, insert the ribbedend of the fitting into the end of the tubing until the tubingcontacts the shoulder of the fitting or tube stop. The crimp ringshall then be positioned on the tubing so the edge of the crimpring is18 in. to14 in. (3.2 to 6.4 mm) from the end of the tube.The jaws
37、of the crimping tool shall be centered over the crimpring and the tool shall be held so that the crimping jaws areapproximately perpendicular to the axis of the barb. The jawsof the crimping tool shall be closed around the crimp ring,compressing the crimp ring onto the tubing. The crimp ringshall no
38、t be crimped more than once. Each crimp shall bechecked to determine conformance to the after crimped dimen-sional requirements of Table 3.11. Test Methods11.1 ConditioningCondition specimens at 73 6 4F (236 2C) and 50 6 5 % relative humidity for not less than 4 hprior to testing. Test Method D618 s
39、hall be used to the extentpossible as a guide to other conditions.11.2 Test ConditionsConduct the tests in the standardlaboratory atmosphere at 73 6 4F (23 6 2C) and 50 6 5%relative humidity unless otherwise specified in the test methodsor in this specification.11.3 SamplingA sample of the fittings,
40、 crimp rings, andPEX tubing sufficient to determine conformance with thisspecification shall be taken at random.11.4 DimensionsAny randomly selected fitting or fittingsand crimp ring or crimp rings shall be used to determinedimensions. Measurements shall be made in accordance withTest Method D2122.
41、Determine the diameters by makingmeasurements at four locations spaced at approximately 45apart around the circumference.11.5 Burst PressureDetermine the minimum burst pres-sure in accordance with Test Method D1599 on at least sixassemblies for each temperature in Table 1. Leakage orseparation at an
42、y of the joints tested, or from the fitting itself,at less than the minimum burst requirements for the tempera-tures specified in Table 1 shall constitute a failure in this test.11.6 Sustained Hydrostatic PressurePerform the test on atleast six assemblies in accordance with Test Method D1598,except
43、for the following:11.6.1 Test temperature shall be 180 6 4F (82 6 2C).11.6.2 The external test environment shall be air or water.11.6.3 Fill the specimens with water at a temperature of atleast 120F (50C).11.6.4 Leakage or separation at any joint tested at less than1000 h at the sustained pressure a
44、s given in Table 2 shallconstitute failure in this test.11.7 Thermocycling:11.7.1 Summary of Test MethodThis test method describesa pass-fail test for thermally cycling assemblies comprised ofinsert fitting, crimp ring, and PEX tubing over a criticaltemperature range for a selected number of cycles
45、whilesubjected to an internal pressure. The test provides a measureof resistance to failure due to the combined effects of differ-ential thermal expansion and creep of connections intended foruse up to and including 180F (82C).11.7.2 ApparatusA pressure source capable of maintain-ing an internal pre
46、ssure of 100 6 10 psi (690 6 69 kPa) on thespecimens is required. An immersion system shall consist oftwo water reservoirs controlled at 60 6 4F (16 6 2C) and180 6 4F (82 6 2C) into which the pressurized specimenswill be immersed. Either samples are cycled manually usingflexible connectors or altern
47、ately the hot and cold water iscycled over the test specimens automatically and returned tothe proper reservoir (Note 2).NOTE 2Automatic recycling may be accomplished by pumping fromeach reservoir through a delivery system having timer-actuated valves tospecimen troughs having synchronized, timer-ac
48、tuated return drains. Anyautomatic apparatus shall provide for complete immersion of the testspecimen in the water.11.7.3 Specimen AssemblyTest six assemblies. Attach theassemblies to a common manifold in such a way to allowfree-end movement of the tubing. Close this specimen assem-bly with any suit
49、able end closure that will allow free-endmounting and will not leak under the thermocycle conditions,and connect the specimen assembly to the pressure source.11.7.4 ProcedurePressurize the specimen assembly withair to 100 6 10 psi (690 6 69 kPa) and check for leaks.Eliminate any leaks before the thermocycle test is started.Thermally cycle the specimen assembly either manually orautomatically and under a constant internal pressure of 100 610 psi (690 6 69 kPa), alternately between 60 6 4F (16 62C) and 180 6
