1、Designation: F3347 18Standard Specification forMetal Press Insert Fittings with Factory AssembledStainless Steel Press Sleeve for SDR9 Cross-linkedPolyethylene (PEX) Tubing1This standard is issued under the fixed designation F3347; the number immediately following the designation indicates the year
2、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 covers copper alloy metal press insert
3、fittings with factory assembled stainless steel press sleevesincorporating 3 view holes for use with cross-linked polyeth-ylene (PEX) tubing in nominal sizes516,38,12,58,34,1,114,112, and 2 that meet the requirements for Specification F876or F3253. These fittings are intended for use in 100 psi (689
4、.5kPa) systems operating at temperatures up to, and including,180 F (82 C). The requirements for materials, workmanship,dimensions, and markings to be used on the fittings and sleevesare also included. The components covered by this specifica-tion are intended for use in residential and commercial,
5、hot andcold, potable water distribution systems as well as sealedcentral heating, including under-floor heating/cooling systems,and residential fire sprinkler systems.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical convers
6、ions to SI units that are provided forinformation only and are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environm
7、ental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,
8、 Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A269/A269M Specification for Seamless and Welded Aus-tenitic Stainless Steel Tubing for General ServiceB124/B124M Specification for Copper and Cop
9、per AlloyForging Rod, Bar, and ShapesB16/B16M Specification for Free-Cutting Brass Rod, Barand Shapes for Use in Screw MachinesB283/B283M Specification for Copper and Copper-AlloyDie Forgings (Hot-Pressed)B371/B371M Specification for Copper-Zinc-Silicon AlloyRod2.2 ASME Standards:3B584 Specification
10、 for Copper Alloy Sand Castings forGeneral ApplicationsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsE92 Test Methods for Vickers Hardness and Knoop Hard-ness of Metallic MaterialsF412 Terminology Relating
11、to Plastic Piping SystemsF876 Specification for Crosslinked Polyethylene (PEX) Tub-ingF877 Specification for Crosslinked Polyethylene (PEX) Hot-and Cold-Water Distribution SystemsF3253 Specification for Crosslinked Polyethylene (PEX)Tubing with Oxygen Barrier for Hot- and Cold-WaterHydronic Distribu
12、tion Systems1This test method 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 Nov. 1, 2018. Published December 2018. DOI:10.1520/F3347182For referenced ASTM standards, visit the ASTM
13、 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 Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park A
14、ve., New York, NY 10016-5990, http:/www.asme.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the D
15、ecision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.12.3 ASME Standards:4B1.20.1 Pipe Threads General Purpose (Inch)B16.18 Cast Copper Alloy Solder Joint Pressure FittingsB1
16、6.22 Wrought Copper and Copper Alloy Solder JointPressure Fittings2.4 Manufacturers Standardization Society Standard:5MSS SP-104 Wrought Copper Solder Joint Pressure Fittings2.5 NSF/ANSI Standards:6Standard 14 Plastic Piping Components and Related Mate-rialsStandard 61 Drinking Water System Componen
17、ts-HealthEffectsStandard 372 Drinking Water System Components-LeadContent2.6 EN Standard:7EN 1982 Copper and Copper Alloys, Ingots and Castings3. Terminology3.1 Unless otherwise specified, definitions, abbreviationsand initialisms are in accordance with Terminology F412 andTerminology D1600.3.2 Defi
18、nitions:3.2.1 metal press insert fitting, nA type of fitting joint thatattaches directly to the plastic tubing by mechanically pressingand deforming an outer stainless steel sleeve over the plastictubing which then compresses and displaces plastic onto theinsert fittings barbs creating a seal and a
19、permanent connec-tion. The seal is realized between the outer diameter of theinsert fitting and the inner diameter of the plastic tubing.Mechanical pressing is achieved by the use of a press tool.3.2.2 press sleeve, nCylindrical shaped stainless steel ringwhich is compressed with a pressing tool whi
20、le located overthe PEX tubing securing it permanently to the underlying insertfitting.3.2.3 press tool, nA device by which the stainless sleeveis compressed by a forming die that is radially closed down onthe press sleeve by either hand powered or electro-mechanicalpressing action.4. Classification4
21、.1 This specification covers one class of fittings andstainless steel press sleeve suitable for use with PEX tubingthat meet either the requirements of Specification F876 orF3253.5. Materials and Manufacture5.1 FittingsThe fittings shall be made from one of thefollowing metals:5.1.1 Cast Copper Allo
22、ysCast copper alloy fittings shallbe made from material meeting the requirements of Specifica-tion B584, copper alloy UNS Nos. C87710 or C87850 orStandard EN 1982, copper alloy EN Symbol CuSn4Zn6Pb3C.5.1.2 Machined Copper AlloyMachined Copper Alloyfittings shall be made from material meeting the req
23、uirementsone of the following:Specification Aloy DesignationB16/B16M UNS C36000B124/B124M UNS C65680, C87700B371/B371M UNS C693005.1.3 Forged Copper AlloyForged Copper Alloy fittingsshall be made from material meeting the requirements ofSpecification B283/B283M, Copper Alloy UNS Nos. C37700,C65680,
24、C69300 or C87700.5.2 Press SleevesPress sleeves shall be made from Speci-fication A269/A269M UNS S30400 or S31600 and have anallowable hardness of 130 6 20 HV5 according to Test MethodE92.5.3 Potable Water RequirementsProducts intended for thetransport of potable water shall be evaluated, tested and
25、certified for conformance with NSF/ANSI Standard 61 or thehealth effects portion of NSF/ANSI Standard 14 by an accept-able certifying organization when required by the regulatoryauthority having jurisdiction.5.3.1 NSF/ANSI Standard 372, limiting lead content of awater contacting component to 0.25 %,
26、 is a mandatoryrequirement within the current version of NSF/ANSI Standard61.NOTE 1Not all alloys listed in 5.1 are NSF/ANSI 61 or NSF 372compliant.5.3.2 Corrosion ResistanceFittings intended for potablewater applications shall comply with dezincification resistanceand stress corrosion cracking resi
27、stance requirements of NSF/ANSI Standard 14.6. Requirements6.1 GeneralAll performance tests shall be performed onassemblies of fittings, press sleeves, and PEX tubing. Fittingsand press sleeves shall meet the material and dimensionalrequirements of this specification. PEX tubing shall meet therequir
28、ements of Specification F876 or F3253. Use separate setsof assemblies for each performance test requirement.6.1.1 Fittings manufactured according to this specificationfor use with PEX tubing shall comply with Specification F877Requirements, Test Methods, and Retest and Rejection.6.2 DimensionsThe di
29、mensions and tolerances of fittingsand press sleeves shall be in accordance with Table 1 as shownin Fig. 1, and Table 2 as shown in Fig. 2 when measured inaccordance with 6.2.1.6.2.1 MeasurementsAny randomly selected fitting orfittings, and press sleeve or press sleeves, shall be used todetermine di
30、mensions. Measurements shall be made in accor-dance with Test Method D2122, except when measuringdiameters of the after pressed sleeves, which shall be measuredperpendicular to the jaw closure plane as shown in Fig. 4 andshall be in accordance with Table 3.4Available from American Society of Mechani
31、cal Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.5Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-hq.org.6Available from NSF Internatio
32、nal, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48105, http:/www.nsf.org.7Available from European Committee for Standardization (CEN), AvenueMarnix 17, B-1000, Brussels, Belgium, http:/www.cen.eu.F3347 1826.2.2 Directional Fitting Outlet(s) Angular AlignmentThemaximum angular variation of any
33、 outlet shall not exceed 1off the true centerline axis of any adjacent outlet.6.2.3 Press Fittings with Solder Joint EndsSolder jointends shall be in accordance with ASME B16.18 ASMEB16.22, or MSS SP-104.6.2.4 Press Fittings with Tapered Threaded EndsFittingthreads shall be right-hand conforming to
34、ASME B1.20.1.They shall be taper threads (NPT).6.3 Factory Assembled Press SleevesStainless steel presssleeves shall be assembled by the fitting manufacturer. Fittingdesign shall allow for either permanently attached (non-removable) press sleeves or snap-in-place (removable) presssleeves.6.4 Pressin
35、g Tool Locating FeatureThe fitting designshall provide a lateral positioning feature for the pressing toolin order to accurately locate the tools pressing profile over theFIG. 1 Metal Insert DimensionsTABLE 1 Metal Insert Dimensions and TolerancesNSTAABBCDD F JEGin. in. in. in. Deg. in. in. Deg. in.
36、 in. in. in. in. in.516 0.281 0.002 0.169 0.004 20 30 0.256 0.002 20 30 0.091 0.004 0.049 0.004 0.118 0.00438 0.344 0.002 0.236 0.004 20 30 0.319 0.002 20 30 0.091 0.004 0.049 0.004 0.118 0.00412 0.473 0.002 0.362 0.004 20 30 0.448 0.002 20 30 0.091 0.004 0.049 0.004 0.118 0.00458 0.571 0.002 0.457
37、0.004 20 30 0.545 0.002 20 30 0.091 0.004 0.049 0.004 0.118 0.00434 0.667 0.003 0.559 0.004 20 30 0.642 0.003 20 30 0.091 0.004 0.049 0.004 0.118 0.0041 0.858 0.003 0.728 0.006 20 30 0.831 0.003 20 30 0.091 0.004 0.049 0.004 0.118 0.004114 1.047 0.004 0.906 0.008 20 30 1.020 0.004 20 30 0.110 0.004
38、0.059 0.004 0.138 0.004112 1.220 0.004 1.083 0.008 20 30 1.193 0.004 20 30 0.110 0.004 0.059 0.004 0.138 0.0042 1.608 0.004 1.417 0.012 20 30 1.581 0.004 20 30 0.189 0.004 0.059 0.004 0.138 0.004NST K LCW I TBHR Xin. in. in. in. in. in. in. in. min in. in. in. in. in. Deg.516 0.358 0.008 0.50 0.01 0
39、.020 0.004 0.039 0.004 0.040 0.005 0.001 0.020 0.004 55 6538 0.358 0.008 0.50 0.01 0.020 0.004 0.039 0.004 0.038 0.005 0.001 0.020 0.004 55 6512 0.358 0.008 0.50 0.01 0.020 0.004 0.039 0.004 0.040 0.005 0.001 0.020 0.004 55 6558 0.358 0.008 0.50 0.01 0.020 0.004 0.039 0.004 0.041 0.005 0.001 0.020 0
40、.004 55 6534 0.358 0.008 0.50 0.01 0.020 0.004 0.039 0.004 0.038 0.005 0.001 0.020 0.004 55 651 0.480 0.008 0.62 0.01 0.020 0.004 0.039 0.004 0.047 0.006 0.001 0.020 0.004 55 65114 0.689 0.008 0.87 0.01 0.020 0.004 0.039 0.004 0.065 0.006 0.001 0.020 0.004 55 65112 0.689 0.008 0.87 0.01 0.020 0.004
41、0.039 0.004 0.049 0.006 0.001 0.020 0.004 55 652 0.768 0.008 1.04 0.01 0.020 0.004 0.039 0.004 0.074 0.006 0.001 0.020 0.004 55 65ARib outside diameter shall be measured individually.BID “B” shall be maintained through the insert length “L”.CDirectional fittings shall be designed with sufficient ove
42、rall dimensions to allow for proper alignment of press tool without interfering with the adjacent press sleeveassembly.DLead chamfer area is not considered a rib.F3347 183press sleeve to align the press bands directly over the centerlineof their respective primary sealing barb groups. After pressing
43、,the resulting pressing bands shall be centered over each of theirrespective primary sealing barb groups within the allowedoffset dimension “M” given in Table 3. See Fig. 3.6.4.1 Pressing Profile Location and AlignmentCompliance with 6.4 will require either machining a cross-section of a completed p
44、ress assembly and taking directmeasurements or by taking depth measurements from the frontface of the press sleeve to the end of the insert barb and to themiddle of each pressing band width (PBW). See Fig. 3.7. Workmanship, Finish, and Appearance7.1 Fittings shall be made from materials that are hom
45、oge-neous throughout, uniform in appearance and free of visiblecracks, holes, blisters, voids, foreign inclusions, or otherdefects that are visible to the naked eye and may affect fittingintegrity. All sealing surfaces shall be smooth and free offoreign material.7.2 Stainless steel press sleeves fin
46、ish and appearance shallbe of bright polished appearance and void of anydiscolorations, visible seams, dents, nicks, or scratches.8. Assembly8.1 Pressing JointsInsert fittings shall be joined by thecompression of a stainless steel sleeve around the outercircumference of the tubing, forcing the tubin
47、g material intoannular spaces formed by ribs on the fitting. Insert fittings andpress sleeves shall meet the dimensional and material require-ments of this standard. PEX tubing shall meet the requirementsof either Specification F876 or F3253. The dimensions of thepress sleeve after it has been press
48、ed and press location shall beaccordance with Table 3.8.1.1 Pressing ProcedureTo affix the insert fitting with anattached press sleeve to the tubing, the pressing procedure shallbe as follows: with the press sleeve in the factory assembledposition, insert the press fitting into the end of the square
49、ly cuttubing until the tubing contacts the shoulder of the fitting ortube stop. Tubing shall be fully visible in at least two viewholes and partially in the third located on the sleeve. Usingonly a manufacturer approved pressing tool, locate the jaws ofthe tool so their press profiles align with the fitting ribs asidentified in Fig. 3. The tool shall be held so that the pressingjaws are approxima
