1、Designation: F2159 09An American National StandardStandard Specification forPlastic Insert Fittings Utilizing a Copper Crimp Ring forSDR9 Cross-linked Polyethylene (PEX) Tubing1This standard is issued under the fixed designation F2159; the number immediately following the designation indicates the y
2、ear 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. Scope1.1 This specification establishes requirements for sulfo
3、neplastic insert fittings and copper crimp rings for four sizes (38,12 , and34 and 1) of cross-linked polyethylene (PEX) plastictubing. These fittings are intended for use in 100 psi (690 kPa)cold- and hot-water distribution systems operating at tempera-tures up to and including 180F (82C). Included
4、 are therequirements for material, molded part properties, perfor-mance, workmanship, dimensions, and markings to be used onthe 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 tha
5、t are provided forinformation only and are not considered standard.1.3 The following is an 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 stand
6、ard does not purport to address all of the safetyconcerns, if any, associated with its use. 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
7、Standards:2D618 Practice for Conditioning Plastics for TestingD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology for Abbreviated Terms Relating to
8、PlasticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD6394 Specification for Sulfone Plastics (SP)F412 Terminology Relating to Plastic Piping SystemsF876 Specification for Crosslinked Polyethylene (PEX)TubingF877 Specification for Crosslinked Polyethylene (PEX)Plas
9、tic Hot- and Cold-Water Distribution SystemsF1498 Specification for Taper Pipe Threads 60 for Ther-moplastic Pipe and FittingsF1807 Specification for Metal Insert Fittings Utilizing aCopper Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) Tubing2.2 ASME Standard:B 1.20.1 Pipe Threads General Purpo
10、se 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 DefinitionsDefinitions are in accordance with Termi-nology F412 and abbreviations are in ac
11、cordance with Termi-nology D1600, unless otherwise indicated.4. Classification4.1 This specification governs one class of fittings andcopper crimp rings suitable for use with nominal size38 ,12 ,34and 1 size PEX tubing that meets the requirements of ASTMSpecifications F876 or F877.5. Materials and M
12、anufacture5.1 MaterialFittings shall be molded from sulfone 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 (gro
13、up 04,1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Dec. 1, 2009. Published January 2010. Originallyapproved 2001. Last previous approved in 2005 as F2159-05. D
14、OI: 10.1520/F2159-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standa
15、rds 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., AnnArbor, MI 48113-0140, http:/www.nsf.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-295
16、9, United States.Class 2, grade 1) or reworked plastic in accordance with 5.1.1.Pigmented products can exceed the maximum specific gravitylisted provided that they comply with all other properties listedin Specification D6394 Table SP.NOTE 1Since fittings specified by this standard will be used inho
17、t-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 this specification. Those qualifying characteristics include, butare not limited
18、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 potable water at the maximum temperature stated in thisspecification.5.1.1 Rework
19、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. Reworked material shall not be introduced at aratio exceeding 25 %.5.2 Potable
20、 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 anacceptable certifying organization when required by the regu-latory authority hav
21、ing 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, orshatter when tested in accordance with 12.1.6.2 SplayThe molded part shall be fr
22、ee 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. Fittingsand crimp rings shall meet the material and dimensionalrequirements of this standard. P
23、EX tubing shall meet therequirements of Specification F876 or F877. Assembly of testspecimens shall be in accordance with Section 10. Use separatesets of assemblies for each performance test requirement.7.2 Hydrostatic BurstAssemblies shall meet the mini-mum hydrostatic burst requirements shown in T
24、able 1, whentested in accordance with 11.5.7.3 Hydrostatic Sustained Pressure StrengthAssembliesshall meet the hydrostatic sustained pressure requirementsshown in Table 2 when tested in accordance with 11.6.7.4 ThermocyclingAssemblies shall not leak or separatewhen thermocycled 1000 cycles between t
25、he temperatures of60F (16C) and 180F (82C) when tested in accordance with11.7.7.5 Excessive Temperature-Pressure Capability:7.5.1 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
26、.8.8. Dimensions8.1 Dimensions and TolerancesThe dimensions and tol-erances of fittings shall be as shown in Fig. 1, when measuredin accordance 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 sh
27、all be AmericanNational Standard Taper Pipe Thread Form conforming toSpecification F1498.8.1.3 Straight ThreadsStraight pipe threads, 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 surf
28、aces of the insert shall be smooth andfree of foreign material. The fitting walls shall be free ofcracks, holes, blisters, voids, 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
29、 in excess of 0.005 in. Flash, mismatch, and witness markrequirements for the insert shall be in accordance with Fig. 1.10. Assembly10.1 Crimp JointsInsert fittings shall be joined to PEXtubing by the compression of a copper crimp ring around theouter circumference of the tubing forcing the tubing m
30、aterialinto annular spaces formed by ribs on the fitting. Insert fittingsand crimp rings shall meet the dimensional and materialrequirements of this standard. PEX tubing shall meet therequirements of Specifications F876 or F877. The dimensionsand out-of-roundness of the crimp ring after it has beenc
31、rimped shall be in accordance with Table 3.TABLE 1 Minimum Hydrostatic Burst Strength Requirements forFitting, Crimp Ring, and PEX Tubing AssembliesNominalTubing SizeMinimum Burst Pressures atDifferent Temperaturesin.psigAat73.4F(kPa) at(23C)psigAat180F(kPa) at(82.2C)38 620 (4275) 275 (1896)12 480 (
32、3309) 215 (1482)34 and larger 475 (3275) 210 (1448)AThe fiber stress to derive this test pressure is: at 73.4F (23.0C) 1900 psi(13.10 MPa) at 180F (82.2C) 850 psi (5.86 MPa).TABLE 2 Minimum Hydrostatic Sustained PressureRequirements for Fitting, Crimp Ring and PEX TubingAssembliesA,BNominalTubing Si
33、zePressure Required for Test, psig (kPa)in. 180F (82.2C)38 250 (1724)12 195 (1344)34 and larger 190 (1310)AThe fiber stress to derive this test pressure is: 770 psi (5.31 MPa) at 180 F(82.2C).BTest duration is 1000 h.F2159 09210.1.1 Crimping ProcedureTo affix the insert fitting to thetubing with the
34、 crimp ring, the crimping procedure shall be asfollows: slide the crimp ring 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 crim
35、pring is18 in. to14 in. (3.2 to 6.4 mm) from the end of the tube.The jaws 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 cri
36、mp ring,compressing the crimp ring onto the tubing. The crimp ringFIG. 1 Fitting Insert Dimensions and TolerancesF2159 093shall not 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 Conditioni
37、ngCondition specimens at 73 6 4F (236 2C) and 50 6 5 % relative humidity for not less than 4 hprior to testing. Test Method D618 shall 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 5065
38、%relative humidity unless otherwise specified in the test methodsor in this specification.11.3 SamplingA sample of the fittings, crimp rings, andPEX tubing sufficient to determine conformance with thisspecification shall be taken at random.11.4 DimensionsAny randomly selected fitting or fittingsand
39、crimp ring or crimp rings shall be used to determinedimensions. Measurements shall be made in accordance withTest Method D2122. Determine the diameters by makingmeasurements at four locations spaced at approximately 45apart around the circumference.11.5 Burst PressureDetermine the minimum burst pres
40、-sure in accordance with Test Method D1599 on at least sixassemblies for each temperature in Table 1. Leakage orseparation at any 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
41、 test.11.6 Sustained Hydrostatic PressurePerform the test on atleast six assemblies in accordance with Test Method D1598,except 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 t
42、emperature of atleast 120F (50C).11.6.4 Leakage or separation at any joint tested at less than1000 h at the sustained pressure as given in Table 2 shallconstitute failure in this test.11.7 Thermocycling:11.7.1 Summary of Test MethodThis test method de-scribes a pass-fail test for thermally cycling a
43、ssemblies com-prised of insert fitting, crimp ring, and PEX tubing over acritical temperature range for a selected number of cycles 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
44、connections intended foruse up to and including 180F (82C).11.7.2 ApparatusA pressure source capable of maintain-ing an internal pressure 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 (
45、82 6 2C) into which the pressurized specimenswill be immersed. Either samples are cycled manually usingflexible connectors or alternately the hot and cold water iscycled over the test specimens automatically and returned tothe proper reservoir (Note 2).NOTE 2Automatic recycling may be accomplished b
46、y pumping fromeach reservoir through a delivery system having timer-actuated valves tospecimen troughs having synchronized, timer-actuated return drains. Anyautomatic apparatus shall provide for complete immersion of the testspecimen in the water.11.7.3 Specimen AssemblyTest six assemblies. Attach t
47、heassemblies to a common manifold in such a way to allowfree-end movement of the tubing. Close this specimen assem-bly with any suitable 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 Pro
48、cedurePressurize 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), alt
49、ernately between 60 6 4F (16 62C) and 180 6 4F (82 6 2C) by means of immersion inwater using the following test cycle (Note 3):Water immersion at 180F 2 min minimumAir immersion at ambient 2 min maximumWater immersion at 60F 2 min minimumAir immersion at ambient 2 min maximumNOTE 3If the test must be interrupted before completion, samples areto be kept at room temperature until the test is restarted.11.7.4.1 Upon completion of 1000 cycles, visually inspectfor leaks while under the test pressu
