1、Designation: F2829 10Standard Specification forMetric-Sized Crosslinked Polyethylene (PEX) Pipe Systems1This standard is issued under the fixed designation F2829; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. 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 performance requirements, testmethods, and marking requirements for metric-sized systemcomponents (e
3、lectrofusion and mechanical fittings) whenjoined with metric-sized PEX pipe (Specification F2788)asasystem, intended for use up to and including a maximumworking temperature of 200F (93C ). The following perfor-mance requirements are described for the fittings 68F(20C) hydrostatic strength, 176F (80
4、C) hydrostatic strength,short-term internal pressure resistance, resistance to tensileloads, cohesive resistance for electrofusion fittings at both theminimum and maximum recommended temperatures, impactresistance for saddle fittings, and leak tightness and pull outtests for mechanical fittings. The
5、 metric-sized componentscovered by this specification are intended for the above-groundand buried pressure piping applications, such as industrial metric PEX joints;metric PEX pipe; metric PEX systemSUPPLEMENTARY REQUIREMENTSGOVERNMENT/MILITARY PROCUREMENTThese requirements apply only to federal/mil
6、itary procurement, not domestic sales or transfers.S1.1 Responsibility for InspectionUnless otherwise speci-fied in the contract or purchase order, the producer is respon-sible for the performance of all inspection and test require-ments specified herein. The producer may use his own or anyother sui
7、table facilities for the performance of the inspectionand test requirements specified herein, unless the purchaserdisapproves. The purchaser shall have the right to perform anyof the inspections and tests set forth in this specification wheresuch inspections are deemed necessary to ensure that mater
8、ialconforms to prescribed requirements.NOTE S1In U. S. Federal contracts, the contractor is responsible forinspection.S1.1.1 Packaging and Marking for U.S. Government Pro-curement: .S1.1.2 PackagingUnless otherwise specified in the con-tract, the materials shall be packaged in accordance with thesup
9、pliers standard practice in a manner ensuring arrival atdestination in satisfactory condition and which will be accept-able to the carrier at lowest rates. Containers and packing shallcomply with Uniform Freight Classification rules or NationalMotor Freight Classification rules.S2.2 MarkingMarking f
10、or shipment shall be in accordancewith Fed. Std. No. 123 for civil agencies and MIL-STD-129 formilitary agencies.NOTE S2The inclusion of U.S. Government procurement require-ments should not be construed as an indication that the U.S. Governmentuses or endorses the products described in this specific
11、ation.F2829 103APPENDIXES(Nonmandatory Information)X1. APPENDIXX1.1 Hydrostatic design stresses recommended by thePlastic Pipe Institute are used to pressure rate PEX plastic pipe.These design stresses are based on the 100,000-h hydrostaticstrength of the pipe obtained in accordance with Test Method
12、D2837. Additional information regarding the method of testand other criteria used in developing these hydrostatic designstresses may be obtained from the Plastics Pipe Institute. SeeTable X1.1 for SDR 9 example.X1.2 Independent methods for determining the hydrostaticdesign stress of fittings have ye
13、t to be developed due to thecomplicating effects of fitting geometry. Instead, fittings andassembled systems carry an implied pressure rating equivalentto that of the corresponding pipe on the basis of actualequivalent hydrostatic performance of assembled systems forperiods exceeding 10,000 h. The s
14、ustained pressure require-ments of 6.2 for fittings tested as assembled systems are basedon stress rupture data for pipe.X1.3 The hydrostatic design stresses are not suitable formaterials that show a negative departure from a straight lineplot of log versus stress versus log time to failure. All of
15、thedata available to date on PEX pipe materials and fittingassemblies, tested in accordance with Test Method D2837,meet this requirement. Experience of the industry indicates thatPEX piping systems made from components meeting therequirements of this specification give satisfactory serviceunder norm
16、al conditions at these temperature-pressure ratings.X2. DESIGN, ASSEMBLY, AND INSTALLATION CONSIDERATIONSX2.1 AssemblyX2.1.1 Compression-Type Fittings:Assemble in accordance with the manufacturers instruc-tions. Compression-type fittings are likely to include insertsand ferrules, or O-rings which fo
17、rm an essential part of thefittings assembly and should not be omitted.X2.1.2 Insert Fittings:A number of techniques have been developed where a fittingis firmly secured to PEX pipe. The fitting is placed inside thetube and a tool is employed to crimp a metallic lock ringaround the pipe outside diam
18、eter adjacent to the fitting. Thisprovides a mechanical lock with the pipe being wedgedsecurely between the ring and the insert fitting.X2.1.3 Mechanical Fittings:Anumber of fitting systems have been developed that can bedescribed as mechanical compression-type joining. They arecomprised of fittings
19、 that provide a seal on the outer surface ofPEX pipe. The actual sealing is affected by the followingmethods:X2.1.3.1 Cold Flaring:Utilize a cold flaring tool, wherein the pipe outside diameteris expanded mechanically. The expanded or flared end is thensecured between a fitting. Flare configuration
20、may vary de-pending on the particular tool employed. The flared surfacegenerally serves as the sealing area between the pipe andfitting.(1) Elastomeric cone with threaded nut.(2) Ferrule with a threaded nut. The above compression-type fittings should be assembled in accordance with themanufacturers
21、recommendations.X2.1.3.2 Electrofusion FittingsAssemble in accordance with the manufacturers instruc-tions. For applications up to 140F (60C), electrofusionfittings are made from polyethylene. For higher temperatureapplications, electrofusion fittings are made from a PEXmaterial.X2.1.4 The manufactu
22、rer should be consulted regardingauthorized fittings for use with PEX pipe.X2.2 InstallationX2.2.1 Storage and Handling:PEX fittings should be stored under cover to avoid unnec-essary dirt accumulation and long-term exposure to sunlight.Care should be used in handling to ensure that unnecessaryabuse
23、, such as dropping on concrete, nicking or denting, isavoided.X2.2.2 Pressure Testing:A pressure test with water at 100 psi (0.69 MPa) on thesystem excluding the hot water heater is advisable to test forfitting leakage.X2.2.3 Soldering in the Area:Soldered metal fittings should not be made closer th
24、an 18 in.(460 mm) to an installed plastic-to-metal adapter in the samewater line.TABLE X1.1 Hydrostatic Design Stresses and Pressure Ratingsfor SDR 9 PEX Pipe for Hot Water Distribution SystemsRatedTemperatureHydrostaticDesign StressPressure Ratingfor WaterF C psi (MPa) psi (MPa)73.4 23 630 (4.32) 1
25、60 (1.10)180 82 400 (2.76) 100 (0.69)200 93 315 (2.17) 80 (0.56)F2829 104X3. OPTIONAL PERFORMANCE QUALIFICATION AND IN-PLANT QUALITY-CONTROL PROGRAM FOR PEX PIPINGSYSTEM COMPONENTSX3.1 ScopeX3.1.1 The following program covers performance qualifi-cation and in-plant quality control for component desi
26、gn andmanufacture respectively to provide reasonable assurance thatPEX components supplied under this specification shall con-sistently meet its requirements.X3.2 Performance QualificationsX3.2.1 Performance qualification tests shall be run initiallyon each component design, size, and formulation in
27、 accordancewith the requirements of this specification. The test resultsshall be independently certified and shall be made available tothe purchaser on request.X3.3 In-Plant Quality ControlX3.3.1 MaterialThe pipe material shall be PEX as defined in Section 4 of thisspecification. The manufacturer sh
28、all so certify.X3.3.2 Quality-Control TestingPipe and fitting quality-control tests shall be run for eachextrusion line or mold cavity in accordance with the require-ments of this specification at a frequency agreed upon betweenthe purchaser and the manufacturer. The program outlined inTable X3.1 is
29、 recommended. The test results shall be recordedand filed for inspection on request. Should a component fail tomeet the specification in any test, production should besampled back to the previous acceptable test result and testedto determine which components produced in the interim do notmeet the re
30、quirement. Components that do not meet therequirements of this specification shall be rejected. See TableTable X3.2.X3.3.3 MarkingFittings shall be marked to identify the manufacturer andshall be coded or placed in dated containers to show the date ofmanufacture.ASTM International takes no position
31、respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard 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.Th
32、is standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Int
33、ernational Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which 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
34、 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), 610-832-9
35、555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE X3.1 Suggested Quality-Control ProgramComponent Property Frequency RequirementFitting Dimensions ho
36、urly 6.2A,BBurst pressure daily 6.3A,BASpecification F2788 for crosslinked polyethylene (PEX) pipe.BThis specification, F2829.TABLE X3.2 Type Test ProgramComponent Property RequirementFittings sustained pressure 6.2A,BThermocycling 6.3A,8Potable water NSF 14ASpecification F2788 for crosslinked polyethylene (PEX) pipe.BThis specification, F2829.F2829 105
