1、Designation: F2735 09 (Reapproved 2016) An American National StandardStandard Specification forPlastic Insert Fittings For SDR9 Cross-linked Polyethylene(PEX) and Polyethylene of Raised Temperature (PE-RT)Tubing1This standard is issued under the fixed designation F2735; the number immediately follow
2、ing 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. Scope*1.1 This specificatio
3、n establishes requirements for sulfoneplastic insert fittings and copper crimp rings for three sizes(12,34, and 1) of cross-linked polyethylene (PEX) and poly-ethylene of raised temperature (PE-RT) plastic tubing. Thesefittings are intended for use in 100 psi (690 kPa) cold- andhot-water distributio
4、n systems operating at temperatures up toand including 180F (82C). Included are the requirements formaterial, molded part properties, performance, workmanship,dimensions, and markings to be used on the fittings and rings.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. T
5、he 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 index of the appendix in thisspecification.GO/NO-GO Crimp Gauges Appendix X11.4 The following precautionary caveat pertains only to the
6、test 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. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicabili
7、ty of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD6394 Specification for Sulfone Plastics (SP)F412 Terminology Relating to Pl
8、astic Piping SystemsF876 Specification for Crosslinked Polyethylene (PEX) Tub-ingF877 Specification for Crosslinked Polyethylene (PEX) Hot-and Cold-Water Distribution SystemsF1498 Specification for Taper Pipe Threads 60 for Thermo-plastic Pipe and FittingsF1807 Specification for Metal Insert Fitting
9、s Utilizing aCopper 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 Tubing2.2 ASME Standard:3B1.20.1 Pipe Threads General Purpose Inch2.3 NSF International Sta
10、ndard4NSF/ANSI Standard No, 14 for Plastic Piping Componentsand Related MaterialsNSF/ANSI Standard No. 61 for Drinking Water SystemComponents-Health Effects3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F412 and abbreviations are in accordance with Termi-nology D1600, u
11、nless otherwise indicated.4. Classification4.1 This specification governs one class of fittings andcopper crimp rings suitable for use with nominal size12,34,and 1 size PEX tubing that meets the requirements of Speci-fications F876 and polyethylene of raised temperature (PE-RT)tubing that meets the
12、requirements of Specification F2623.5. Ordering Information5.1 MaterialMaterialFittings shall be molded fromsulfone plastic (SP) as specified in Specification D6394. The1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subc
13、ommittee F17.10 on Fittings.Current edition approved April 1, 2016. Published May 2016. Originallyapproved in 2008. Last previous edition approved in 2009 as F273509.DOI:10.1520/F273509R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servic
14、eastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available fro
15、m NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, 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 st
16、andard was developed in accordance with internationally recognized 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.1mat
17、erial shall be polyphenylsulfone (group 03, class 1, grade 1or 2) or unreinforced polyphenylsulfone/polysulfone blends(group 04, Class 2, grade 1) or reworked plastic in accordancewith 5.1.1. Colored products can exceed the maximum specificgravity listed provided that they comply with all other prop
18、er-ties listed in Specification D6394 Table SP.5.1.1 Since fittings specified by this standard will be used inhot-and-cold water plumbing systems, a material used tomanufacture fittings in accordance with this specification mustdemonstrate qualities consistent with that application in addi-tion to t
19、he performance requirements of this specification.Those qualifying characteristics include, but are not limited to,an established hydrostatic design basis (HDB) or stress designbasis (SDB) in accordance with PPI TR-3 or similar rating anda demonstration of resistance to the long-term effects of thos
20、echemicals normally found in potable water at the maximumtemperature stated in this specification.5.1.2 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 re
21、quirements of thisspecification. 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 NSF/ANSI Standard No. 61 orthe health effects portion of
22、NSF/ANSI Standard No. 14 by anacceptable 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 in
23、sert shall not crack, split, orshatter 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,
24、and PEX tubing. Fittingsand crimp rings shall meet the material and dimensionalrequirements of this standard. PEX tubing shall meet therequirements of Specification F876. Assembly of test speci-mens shall be in accordance with Section 10. Use separate setsof assemblies for each performance test requ
25、irement.7.2 The following sections of Specification F877 constitutea part of this specification:7.2.1 Hydrostatic Burst,7.2.2 Hydrostatic Sustained Pressure Strength,7.2.3 Thermocycling,7.2.4 Excessive Temperature-Pressure Capability, and7.2.5 Test Methods.7.3 In addition, when a section with a titl
26、e identical to thatreferenced in 7.2 appears in this specification, it containsadditional requirements that supplement those appearing inSpecification F877.8. Dimensions8.1 Dimensions and TolerancesThe dimensions and tol-erances of fittings shall be as shown in Fig. 1, when measuredin accordance wit
27、h 11.18.1.1 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 threads, intended forth
28、e making of a gasketed seal with taper pipe threads, shall beAmerican National Straight Pipe Thread for Fixtures (free-fitting mechanical joints), NPSM, and conform to ASME B1.20.1.9. Workmanship, Finish, and Appearance9.1 The sealing surfaces of the insert shall be smooth andfree of foreign materia
29、l. 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 in excess of 0.005 in. (0.13 mm). Flash, mismatch, andwitnes
30、s mark requirements for the insert shall be in accordancewith 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 materialinto annular spaces formed by ribs on the fi
31、tting. Insert fittingsand crimp rings shall meet the dimensional and materialrequirements of this standard. PEX tubing shall meet therequirements of Specifications F876. The dimensions andout-of-roundness of the crimp ring after it has been crimpedshall be in accordance with Table 1.10.1.1 Crimping
32、ProcedureTo affix the insert fitting to thetubing with the 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 ringshal
33、l then be positioned on the tubing so the edge of the crimpring contacts the shoulder of the fitting or tube stop. The jawsof the crimping tool shall be centered over the crimp ring andthe tool shall be held so that the crimping jaws are approxi-mately perpendicular to the axis of the barb. The jaws
34、 of thecrimping tool shall be closed around the crimp ring, compress-ing the crimp ring onto the tubing. The crimp ring shall not becrimped more than once. Each crimp shall be checked todetermine conformance to the after crimped dimensionalrequirements of Table 1.F2735 09 (2016)211. Test Methods11.1
35、 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. Determine the diameters by makingmeasurements at four locations spaced at approximately 45apart around the circumfer
36、ence.12. Molded Part Properties Test Methods12.1 Insert Crush TestUnder ambient conditions, test sixfittings of each size in accordance with 12.1.1.12.1.1 ProcedureUsing a bench vise or other suitablecompression device, place the insert of the fitting between thejaws of the vise. Close the jaws of t
37、he vise deforming the insertuntil the opposing inside walls of the insert touch. The insertshall not crack, split, or shatter, see Fig. 3. Separation of theinsert from the fitting body at the shoulder shall not beconsidered a failure, see Fig. 4.ABALBH W G T R MaximumFlashand MismatchSize(in.)Outsid
38、eDiameterMinimumIDInsertLengthMinimumRib HeightNumberof RibsCRib WidthTypeGap WidthTypeMinimumWallDMinimumRadiusTotal onCrestDiameterEF12 0.471 .004 0.315 0.480 .0040.011 2 0.02- 0.04 0.114.004 0.059 0.03 0.00534 0.667 .004 0.490 0.480 .0040.011 2 0.02- 0.04 0.114.004 0.067 0.03 0.0051 0.856 .004 0.
39、645 0.480 .0040.011 2 0.02- 0.04 0.114.004 0.084 0.03 0.005AThe minimum ID shall be maintained through the insert length and into the fitting, intersecting and minimum ID of the other fitting.BFitting shall be designed with sufficient overall dimensions to allow proper use of crimp tool without inte
40、rference with previously completed crimps on the same fitting.CLead chamfer area is not considered rib.DApplies to entire fitting and not just insert area.EThe maximum flash and mismatch at the root diameter between the ribs may not exceed 30% of rib heightFThe total flash and mismatch is assumed to
41、 be the difference between the dimensions X and Y (See Fig. 2 a.) These dimensions may be measured with appropriatecallipers 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 TolerancesaFlash
42、 and Mismatch Created byImperfection in Die Half InterfacesbTotal Flash and MismatchFIG. 2 Fitting Insert Dimensions and TolerancesTABLE 1 Crimp Ring Dimensions After Crimping on Tube/FittingAssemblyNominal Tube SizeInsert EndFinal Crimped Outside DiameterA,BMinimum, in. (mm) Maximum, in. (mm)12 0.7
43、00 (17.8) 07.15 (18.2)34 0.945 (24.0) 0.960 (24.4)1 1.175 (29.8) 1.190 (30.2)AFor all diameters except for the area of scoring caused by the crimping tool.BThe maximum out of roundness as measured by the difference between theminimum crimped outside diameter and the maximum crimped outside diameters
44、hall not exceed 0.006 in. 90.150 mm).F2735 09 (2016)313. Restest13.1 If any failure occurs, a retest shall be conducted onlyif agreed upon between the purchaser and the seller. Failure inthe retest is cause for rejection of the shipment.14. Quality Assurance14.1 When the product or product packing i
45、s marked withtheASTM designation F2735, the manufacturer affirms that theproduct was manufactured, inspected, sampled, and tested inaccordance with this specification and has been found to meetthe requirements of this specification.15. Product Marking15.1 Quality of MarkingThe marking shall be appli
46、edto the fittings in such a manner that it remains legible afterinstallation and inspection.15.2 Content of Marking:15.2.1 Marking on fittings shall include manufacturersname or trademark, or some other identifying mark, materialdesignation, and ASTM F2735.15.2.1.1 Where recessed marking is used on
47、fittings, careshall be taken to see that in no case shall the marking causecracks or reduce the wall thickness below the minimumspecified.15.2.2 Marking on packaging shall include manufacturersname, fitting size, and ASTM F2735.16. Keywords16.1 cold- and hot-water distribution; copper crimp rings;cr
48、oss-linked polyethylene; plastic insert fittings; PEX; PE-RTAPPENDIX(Nonmandatory Information)X1. GO/NO-GO CRIMP GAUGEX1.1 This appendix provides dimensions for gages to checkthe after-crimped dimensions of the three sizes of crimpconnections governed by this standard. This information hasbeen taken
49、 from gages in current production at the time of thewriting of this standard. Gages shown here provide only areference for the maximum and minimum diameters of thecrimped ring and do not provide a check for the out-of-rounddimension. Additionally, calipers or micrometers may also beused.X1.2 Crimp gages manufactured according to the dimen-sions shown in Fig. X1.1 will ensure that crimps checked withthese gages will not be larger or smaller than those allowed bythis standard.X1.3 Use of the Crimp GO/NO-GO GageSlide thecorrect si
