1、Designation: F 1961 02aAn American National StandardStandard Specification forMetal Mechanical Cold Flare Compression Fittings with DiscSpring for Crosslinked Polyethylene (PEX) Tubing12This standard is issued under the fixed designation F 1961; the number immediately following the designation indic
2、ates 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers metal mechanical
3、 cold flarecompression fittings with integral disc spring suitable for usewith cross-linked polyethelene PEX plastic tubing in38,12,58,and34 nominal diameters. that meets the requirements ofSpecifications F 876 and F 877. These fittings are intended foruse in 100 psi (689.5 kPa) cold and hot water d
4、istributionssystems and hydronic heating systems operating at tempera-tures up to and including 180F (82C). Included are therequirements for materials, workmanship, dimensions, andmarkings to be used on the fittings.1.2 UnitsThe values stated in inch-pounds units are to beregarded as the standard. T
5、he values given in parentheses aremathematical conversions to SI units which 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
6、 to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:A 666 Specification for Annealed or Cold-Worked Austen-itic Stainless Steel Sheet, Strip, Plate and Flat Bar3B 16 Specification for
7、 Free-Cutting Brass Rod, Bar, andShapes for Use in Screw Machines4B 140/B 140M Specification for Copper-Zinc-Lead(Leaded Red Brass or Hardware Bronze) Rod, Bar andShapes4B 283 Specification for Copper and Copper-Alloy Die Forg-ings (Hot Pressed)4D 1600 Terminology for Abbreviated Terms Relating toPl
8、astics5D 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and Fittings6E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic Materials7F 412 Terminology Relating to Plastic Piping Systems6F 876 Specification for Crosslinked Polyethylene (PEX)Tubing6F
9、877 Specification for Crosslinked Polyethylene (PEX)Plastic Hot- and Cold-Water Distribution Systems62.2 ASME Standards:8B1.20.1 Pipe Threads General Purpose (inch)B16.18 Cast Copper Alloy Solder Joint Pressure FittingsB16.22 Wrought Copper and Copper Alloy Solder JointPressure Fittings2.3 NSF Stand
10、ards:9NSF 14 Plastic Piping Components and Related MaterialsNSF 61 Drinking Water System Components-Health Effects2.4 DIN Standard:10DIN 1766.2.5 Other Standard:11MSS SP-104, Wrought Copper Solder Joint Pressure Fit-tings1This specification is under the jurisdiction of ASTM Committee F17 on PlasticP
11、iping Systems, and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Oct. 10, 2002. Published January 2003. Orginallyapproved in 1999. Last previous edition approved in 2002 as F196102.2The cold flare compression fitting with integral disc spring is covered by
12、apatent. Interested parties are invited to submit information regarding the identifica-tion of an alternative to this patented item to ASTM headquarters. Your commentswill receive careful consideration at a meeting of F17, which you may attend.3Annual Book of ASTM Standards, Vol 01.03.4Annual Book o
13、f ASTM Standards, Vol 02.01.5Annual Book of ASTM Standards, Vol 08.01.6Annual Book of ASTM Standards, Vol 08.04.7Annual Book of ASTM Standards, Vol 03.01.8Available from American Society of Mechanical Engineers, United Engineer-ing Center, 345 E. 47th St., New York, NY 10017.9Available from National
14、 Sanitation Foundation, P.O. Box 1468, Ann Arbor, MI48106.10Available from Deutsches Institut Fur Normung eV. Burggrafenstrasse 4Berlin 30, West Germany D-1000.11Available from Manufacturers Standardization Society of the Valve andFittings Industry, 5203 Leesburg Pike, Suite 502, Falls Church, VA 22
15、041.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F 412 and abbreviations are in accordance with Termi-nology D 1600 unless otherwise indicated.4. Classif
16、ication4.1 This specification covers one class of mechanical coldflare compression fittings suitable for use with four sizes ofPEX tubing that meets the requirements of SpecificationsF 876 and F 877.5. Materials and Manufacture5.1 FittingsThe fittings shall be made from one of thefollowing metals:5.
17、1.1 Machined Brass FittingsMachined brass fittingsshall be made from material meeting the requirements ofSpecification B 140 copper alloy UNS C31400, SpecificationB 16 Copper alloy UNS C38500, or DIN 17660 CuZn39Pb3.5.1.2 Forged Brass FittingsForged brass fittings shall bemade from material meeting
18、the requirements of SpecificationB 283 Copper alloy UNS C37700, or DIN 17660-CuZn40Pb2.5.1.3 Disc SpringThe disc spring assembly consists ofone conical compression washer and one flat washer. Bothwashers shall be made from material meeting the requirementsof Specification A 666 stainless steel UNS S
19、30100. The flatwasher shall be12 hard. The minimum hardness of the conicalcompression washer shall be HRC 40.6. General Requirements6.1 The following sections of Specification F 877 constitutea part of this specification:6.1.1 Requirements,6.1.2 Test Methods, and6.1.3 Retest and Rejection.6.2 In add
20、ition, when a section with a title identical to thatreferenced in 6.1, above, appears in this specification, itcontains additional requirements that supplement those appear-ing in Specification F 877.6.3 Performance Requirements:6.3.1 GeneralAll performance test shall be preformed inassemblies of fi
21、ttings and PEX tubing as defined in 8.3. Fittingsand compression sleeves shall meet the material and dimen-sional requirements of this standard. PEX tubing shall meet therequirements of Specifications F 876 and F 877. Assembly oftest specimens shall be in accordance with 9.2. Use separate setof asse
22、mblies for each performance test requirement.6.3.2 Dimensions Randomly selected fitting or fittingsand PEX reinforcing rings shall be used to determine dimen-sions. Measurements shall be made in accordance with TestMethod D 2122. Determine the diameters by making measure-ments at four points spaced
23、at approximately 45 apart aroundthe circumference. Inspection and gauging of taper joint endsshall be in accordance with ANSI B16.18, or ANSI B16.22, orMSS SP-104. Inspection and gaging of taper pipe threads shallbe in accordance with ANSI B1.20.1. All fittings that will besubjected to secondary pro
24、cesses of mechanical marking,which affect their dimensional tolerances, shall be tested intheir final marked configuration.7. Dimensions7.1 Dimensions and TolerancesThe dimensions and tol-erances of fitting components shall be as shown in Figs. 1-3when measured in accordance with 6.3.2. Dimensions a
25、ndproperties of flat and conical compression washer componentsof disc springs shall be in accordance with Table 1.7.1.1 AlignmentThe maximum angular variation of anyopening shall not exceed12 off the true centerline axis.7.1.2 Fittings with Solder Joint EndsExternal dimensionsof solder joint ends sh
26、all be in accordance with ANSI B.16.22,B16.18, or MSS SP-104.7.1.3 Tapered Threaded EndsFitting threads shall beright-hand conforming to ANSI B1.20.1. They shall be taperthreads (NPT).8. Workmanship, Finish and Appearance8.1 The sealing surfaces of the fitting(s) shall be smooth andfree of foreign m
27、aterial. The fitting walls shall be free ofcracks, holes, blisters, voids, foreign inclusions or other defectsthat are visible to the eye without magnification and that havepotential to affect the wall integrity.9. Assembly9.1 JointsMechanical cold flare compression fittings shallbe joined to PEX tu
28、bing by the procedure of 8.2. Fittings shallmeet the dimensional tolerances of this standard. PEX tubingshall meet the requirements of Specifications F 876 and F 877.9.1.1 Solder JointsSoldering of fitting joints shall becompleted prior to installation of the PEX tubing. Excessiveheat from the solde
29、ring operation will damage the PEX tubing.9.2 Assembly ProcedureRefer to Fig. 4 for a cross-sectionof a fully-assembled cone union with PEX tubing and malefitting end. To affix the mechanical cold flare compressionfitting to PEX tubing, the procedure shall be as follows:9.2.1 Cut the tubing square u
30、sing a cutter designed forplastic tubing. Inspect the end for burrs or foreign debris. Placethe proper-size cone union assembly (female fitting) onto theassembly tool. Place the PEX tubing into the tool, so that thecut end abuts the cone union. Grip the PEX tubing by closingthe locking handle of the
31、 tool until the tool locks. Fully closethe compression lever. This action both presses the grip ring ofthe cone union assembly onto the PEX tubing, and flares theend of the PEX tubing to an angle of 22. Open the compres-sion lever to release the PEX tubing and the fitting. Tighten thecone union nut
32、onto the mating (male) end of the desiredfitting, until the torque shown in Table 2 has been applied.Custom torque wrenches that are adjusted to slip at thesetorque values are available and appropriate.9.3 One assembly for testing purposes is one fitting withPEX tubing assembled onto each leg of the
33、 fitting.10. Quality Assurance10.1 When the product or product packaging is marked withthe ASTM designation F 1961, the manufacturer affirms thatthe product was manufactured, inspected, sampled, and testedin accordance with this specification, and has been found tomeet the requirements of this speci
34、fication.F 1961 02a2FIG.1MaleFittingDimensionsF 1961 02a3FIG.2UnionNutDimensionsF 1961 02a4FIG.3GripRingDimensionsF 1961 02a511. Product Marking11.1 Quality of MarkingThe marking shall be applied tothe fittings in such a manner that it remains legible afterinstallation and inspection.11.2 Content of
35、 Marking:TABLE 1 Dimensions and Properties of Flat and Conical Compression Washers for Disc SpringsNominal FittingSize, in.Shape Outside Diameter, in. Inside Diameter, in. Thickness, in. Spring Height, in.Initial SpringConstant, lbf/in.38 flat 0.675 to 0.681 0.539 to 0.545 0.023 to 0.027AAConical co
36、mpression 0.660 to 0.664 0.544 to .0548 0.028 to 0.032 0.010 16000 to 2300012 flat 0.866 to 0.870 0.697 to 0.701 0.037 to 0.041AAConical compression 0.854 to 0.858 0.700 to 0.704 0.037 to 0.041 0.011 25000 to 4200058 flat 1.080 to 1.088 0.835 to 0.841 0.038 to 0.042AAConical compression 1.067 to 1.0
37、71 0.843 to 0.847 0.048 to 0.052 0.016 18000 to 2600034 flat 1.192 to 1.198 0.956 to 0.962 0.048 to 0.052AAConical compression 1.172 to 1.176 0.964 to 0.968 0.053 to 0.057 0.015 23000 to 48000ANot applicable.FIG. 4 Cross-Section (Typical) of Cone Union/PEX Tube/Male FittingTABLE 2 Torque Values for
38、Tightening Cone Union AssembliesSize, in. Torque, lbf/in. (N/m)A38 125 (14)12 140 (16)58 300 (35)44 450 (50)AAll torque values are specified as the above 6 10 %.F 1961 02a611.2.1 Marking on fittings shall include manufacturersname or trademark, or some other identifying mark. Additionalmarking shall
39、 include ASTM standard number and PEX, if sizepermits.11.2.1.1 Where recessed marking is used on fittings, careshall be taken to see that in no case shall the marking causecracks or reduce the wall thickness below the minimumspecified.11.2.2 Marking on packaging shall include manufacturersname, fitt
40、ing size and ASTM F 1961.11.2.3 Markings on compression sleeves shall includemanufacturers trademark or some other identifying mark andASTM F 1961.12. Keywords12.1 cold and hot water distribution; cold expansion insertfittings; crosslinked polyethylene; PEXSUPPLEMENTARY REQUIREMENTSS1. POTABLE WATER
41、 REQUIREMENTSS1.1 This requirement applies whenever a regulatory au-thority or user calls for product to be used to convey or be incontact with potable water.S1.2 Products intended for the transport of potable watershall be evaluated, tested and certified for conformance withANSI/NSF 61 or the healt
42、h effects portion of NSF 14 by anacceptable certifying organization when required by the regu-latory authority having jurisdiction.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard
43、are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif no
44、t revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which
45、you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 1961 02a7
