1、Designation: F2434 14 An American National StandardStandard Specification forMetal Insert Fittings Utilizing a Copper Crimp Ring for SDR9Cross-linked Polyethylene (PEX) Tubing and SDR9 Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene(PEX-AL-PEX) Tubing1This standard is issued under the f
2、ixed designation F2434; the number 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
3、revision or reapproval.1. Scope*1.1 This specification covers metal insert fittings with o-ringseals and copper crimp rings for use with Cross-linked Poly-ethylene (PEX) and Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX-AL-PEX) tubing in12,34 1,and 114 in. nominal diameters that
4、meet the requirements forSpecifications F876 and F2262. These fittings are intended foruse in 125 psi (861.9 kPa) (PEX-AL-PEX) and 100 psi (689.5kPa) (PEX) cold- and hot-water distribution systems operatingat temperatures up to and including 180F (82C). Included arethe requirements for materials, wo
5、rkmanship, dimensions,performance, and markings to be used on the fittings and rings.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.
6、1.3 Compliance with this specification requires that thesefittings be tested and certified to Specification F877 and F2262.1.4 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
7、-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B16/B16M Specification for Free-Cutting Brass Rod, Barand Shapes for Use in Screw MachinesB62 Specification for Composition Bronze or Ounce MetalCast
8、ingsB140/B140M Specification for Copper-Zinc-Lead (RedBrass or Hardware Bronze) Rod, Bar, and ShapesB283 Specification for Copper and Copper-Alloy Die Forg-ings (Hot-Pressed)B371/B371M Specification for Copper-Zinc-Silicon AlloyRodB584 Specification for Copper Alloy Sand Castings forGeneral Applicat
9、ionsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsF412 Terminology Relating to Plastic Piping SystemsF876 Specification for Crosslinked Polyethyl
10、ene (PEX) Tub-ingF877 Specification for Crosslinked Polyethylene (PEX) Hot-and Cold-Water Distribution SystemsF2262 Specification for Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Tubing OD Con-trolled SDR92.2 ASME Standards:3B1.20.1 Pipe Threads General Purpose (Inch)B16.18 Cast Copper
11、 Alloy Solder Joint Pressure FittingsB16.22 Wrought Copper and Copper Alloy Solder JointPressure Fittings2.3 Manufacturers Standardization Society Standard:SP-104 Wrought Copper Solder Joint Pressure Fittings42.4 NSF International Standards:5NSF/ANSI 14 Plastic Piping Components and Related Ma-teria
12、ls1This 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 Aug. 1, 2014. Published September 2014. Originallyapproved in 2004. Last previous edition approved in 2009 as F2
13、435 - 09. DOI:10.1520/F2434-14.2For 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 Socie
14、ty of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.5Available from NSF I
15、nternational, 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 standard
16、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.1NSF/ANSI 6
17、1 Drinking Water System Components-HealthEffects3. Terminology3.1 Definitions are in accordance with Terminology F412and abbreviations are in accordance with Terminology D1600,unless otherwise indicated.4. Classification4.1 This specification covers one class of fittings and coppercrimp rings suitab
18、le for use with tubing that meets therequirements of Specifications F876 and F2262.5. Materials and Manufacture5.1 FittingsThe fittings shall be made from one of thefollowing metals:5.1.1 Cast Copper AlloysCast copper alloy fittings shallbe made from material meeting the requirements of Specifica-ti
19、on B584, Copper Alloy UNS Nos. C84400, C83800, C87850or C89844 or Specification B62 Copper Alloy UNS No.C83600.5.1.2 Machined BrassMachined brass fittings shall bemade from material meeting the requirements of SpecificationB371/B371M, Copper Alloy UNS No. C69300, SpecificationB140/B140M Copper Alloy
20、 UNS No. C31400, SpecificationB283 Copper Alloy UNS No. C37700, or Specification B16/B16M Copper Alloy UNS No. C36000 or C69300 CopperAlloy UNS No. C27450.5.1.3 Forged BrassForged brass fittings shall be madefrom material meeting the requirements of Specification B283Copper Alloy UNS Nos. C37700 or
21、Copper Alloy UNS No.C27450.5.2 Crimp RingsCrimp rings shall be made from copperUNS Nos. C10200, or C12200, and shall be black in color oralternately be identified per 10.2.3.2 of this specification. Thecrimp rings shall have a minimum allowable hardness of 35and a maximum allowable hardness of 45 on
22、 the Rockwell 15Tscale when measured according to Test Methods E18.5.3 O-ringsO-rings used on the copper alloy fittings tomake a static seal shall be manufactured from ethylenepropylene rubber (EPDM) or silicone rubber (Si), with a ShoreA durometer between 60 and 70 when tested in accordancewith Spe
23、cification D2240.6. General Requirements6.1 The following sections of Specifications F877 andF2262 constitute a part of this specification.6.1.1 Use with PEX Tubing (F877):6.1.1.1 Requirements,6.1.1.2 Test Methods, and6.1.2 Use with PEX-AL-PEX Tubing (F2262):6.1.2.1 Performance Requirements of Conne
24、ctors exceptproduct marking section.6.1.3 Retest and Rejection.6.2 In addition, when a section with a title identical to thatreferenced in 6.1, appears in this specification, it containsadditional requirements that supplement those appearing inSpecifications F877 and F2262.6.3 DimensionsAny randomly
25、 selected fitting or fittings,and crimp ring or crimp rings, shall be used to determinedimensions. Measurements shall be made in accordance withTest Method D2122, except determine diameters by makingmeasurements at four locations spaced approximately 45 apartaround the circumference. Inspection and
26、gauging of solderjoint ends shall be in accordance with ASME B16.18, ASMEB16.22, or MSS SP-104.6.4 GeneralAll performance tests shall be performed onassemblies of fittings, crimp rings, PEX, and PEX-AL-PEXtubing. Fittings and crimp rings shall meet the material anddimensional requirements of this sp
27、ecification. PEX tubingshall meet the requirements of Specification F876. PEX-AL-PEX tubing shall meet the requirements of SpecificationF2262.Assembly of test specimens shall be in accordance with9.1.1. Use separate sets of assemblies for each performance testrequirement. In addition, fittings shall
28、 be designed with suffi-cient overall dimensions to allow proper use of crimp toolwithout interference with previously completed crimps on thesame fitting.7. Dimensions7.1 Dimensions and TolerancesThe dimensions and toler-ances of fittings and crimp rings shall be as shown in Fig. 1,Fig. 3, Fig. 4,
29、and Table 1, when measured in accordance with6.3.7.1.1 AlignmentThe maximum angular variation of anyopening shall not exceed 1 off the true centerline axis.7.1.2 Fittings with Solder Joint EndsSolder joint endsshall be in accordance with ASME B16.22, ASME B16.18, orMSS SP-104.7.1.3 Tapered Threaded
30、EndsFitting threads shall beright-hand conforming to ASME B1.20.1. They shall be taperthreads (NPT).8. Workmanship, Finish, and Appearance8.1 The sealing surfaces of the insert shall be smooth andfree of foreign material. Fitting walls shall be free of cracks,holes, blisters, voids, foreign inclusio
31、ns, or other defects thatare visible to the unaided eye, that affect the wall integrity.9. Assembly9.1 Crimp JointsInsert fittings shall be joined to PEX, orPEX-AL-PEX, tubing by the compression of a copper crimpring around the outer circumference of the tubing, forcing thetubing material into annul
32、ar spaces formed by ribs on thefitting. Insert fittings and crimp rings shall meet the dimen-sional and material requirements of this standard. The dimen-sions and out-of-roundness of the crimp ring, after it has beencrimped, shall be in accordance with Table 1.9.1.1 Crimping ProcedureThe crimping p
33、rocedure shallbe as follows: slide the crimp ring onto the tubing, insert theribbed end of the fitting into the end of the tubing until thetubing contacts the shoulder of the fitting or tube stop. Thecrimp ring shall then be positioned on the tubing so the edge ofthe crimp ring is18 to14 in. (3.2 to
34、 6.4 mm) from the end ofthe tube. The jaws of the crimping tool shall be centered overthe crimp ring and the tool shall be held so that the crimpingF2434 142jaws are approximately perpendicular to the axis of the barb.The jaws of the crimping tool shall be closed around the crimpring, compressing th
35、e crimp ring onto the tubing. The crimpring shall not be crimped more than once. Each crimp shall bechecked to determine conformance to the after-crimped dimen-sional requirements of Table 1.10. Product Marking10.1 Quality of MarkingThe marking shall be applied tothe fittings in such a manner that i
36、t remains legible afterinstallation and inspection.10.2 Content of Marking:SizeAOutsideDiameterof RibBMini-mumIDL1Distanceto FirstRibL2MinInsertLengthAHMinRibHeightNum-berofRibsBWRibCWidthGRibSpacingTypicalTMini-mumWallDR1Mini-mumRibRa-diusR2Mini-mumRa-diusSIsolatorDiameterEEGrooveDepth12 in. 0.471
37、0.004 0.310 0.214-0.224 0.625 0.013 3 0.030.04 0.0580.066 0.028 0.006 0.015 0.518 0.002 0.040 0.00134 in. 0.667 0.004 0.500 0.214-0.224 0.625 0.013 3 0.030.04 0.0580.066 0.037 0.006 0.015 0.738 0.005 0.040 0.0011 in. 0.856 0.004 0.667 0.214-0.224 0.795 0.013 4 0.030.04 0.0580.066 0.041 0.006 0.015 0
38、.963 0.005 0.040 0.001114 in. 1.045 0.004 0.860 0.214-0.224 0.795 0.013 4 0.030.04 0.0580.066 0.045 0.006 0.015 1.150 0.005 0.040 0.001AMeasured from shoulder of rib to end of fitting.BLead chamfer area is not considered a rib.CRib sides may be angled.DApplies to entire fitting, not just insert area
39、.EThis diameter serves as a tube stop to isolate Aluminum layer, in PEX-AL-PEX tubing, preventing contact with the brass.FIG. 1 Fitting Insert Dimensions and TolerancesNOTE 1The Barb/O-ring design is covered by a patent. Interested parties are invited to submit information regarding the identificati
40、on of analternative(s) to this patent item to theASTM International Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend.FIG. 2 Sealing O-ring PlacementF2434 14310.2.1 Marking on fittings shall include manufacturersnam
41、e or trademark, or some other identifying mark, and theASTM standard number.10.2.1.1 Where recessed marking is used on fittings, careshall be taken to see that the marking shall not cause cracks orreduce the wall thickness below the minimum specified.10.2.2 Marking on packaging shall include manufac
42、turersname, fitting size, and ASTM F2434.10.2.3 Crimp rings:10.2.3.1 Marking on crimp rings shall include manufactur-ers trademark or some other identifying mark and ASTMF2434.10.2.3.2 Manufacturer of crimp rings may use an alternateidentifying marking in place of the “black in color” providedthe ri
43、ng is generally natural copper color with18 in. minimumblack font lettering stating “PEX” or “PEX-AL-PEX,” or bothSizeIDInsideDiameterWO-ringCross Section12 in. 0.394 0.005 0.039 0.00334 in. 0.591 0.005 0.039 0.0031 in. 0.768 0.009 0.039 0.003114 in. 0.945 0.009 0.039 0.003FIG. 3 Fitting O-ring Dime
44、nsions and TolerancesSizeAAvg OutsideDiameterA,BBCWidthWall ThicknessBAverage WallC ,D12 in. 0.750 0.003 0.056 0.0035 0.002 0.325 0.02034 in. 1.000 0.003 0.056 0.0035 0.002 0.325 0.0201 in. 1.250 0.003 0.049 0.0035 0.002 0.450 0.020114 in. 1.500 0.003 0.055 0.0035 0.002 0.550 0.020AAll dimensions sh
45、all be measured with appropriate micrometers, such as pin or ball micrometers for wall and outside diameter micrometers with flat anvils or verniercalipers shall be used to measure outside diameters and width of rings.BThe average measurement is obtained from measurements taken in at least two diffe
46、rent circumferential positions which are equally spaced around the circumference.CThe average wall measurement is obtained from measurements taken in eight different positions which are equally spaced around the circumference.DThe maximum out-of-roundness of the crimp ring shall not inhibit assembly
47、 with the fitting and tubing. The crimp ring dimensions after crimping shall comply withTable 1.FIG. 4 Copper Crimp Ring Dimensions Before CrimpingF2434 144legibly printed in two (2) locations spaced equally, approxi-mately 180 on the rings outer circumference. For sizessmaller than34 in. where both
48、 “PEX” and “PEX-AL-PEX”marks are applied, it is permissible to only print “PEX” and“PEX-AL-PEX” in one location on the circumference.11. Quality Assurance11.1 When the product or product packing is marked withtheASTM designation F2434, the manufacturer affirms that theproduct was manufactured, inspe
49、cted, sampled, and tested inaccordance with this specification and has been found to meetthe requirements of this specification.12. Keywords12.1 cold and hot water distribution; copper crimp rings;cross-linked polyethylene; metal insert fittings; PEX; PEX-AL-PEXSUPPLEMENTARY REQUIREMENTSThis requirement applies whenever a regulatory authority or user calls for product to be used toconvey or be in contact with potable water.S1. Potable Water RequirementsS1.
