1、Designation: F877 11aF877 18 An American National StandardStandard Specification forCrosslinked Polyethylene (PEX) Hot- and Cold-WaterDistribution Systems1This standard is issued under the fixed designation F877; the number immediately following the designation indicates the year of originaladoption
2、 or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers requirements, test methods, and marking requirements
3、for system components when tested withnominal SDR9 crosslinked polyethylene tubing as a system. Systems are intended for 100 psi (0.69 MPa) water service up to andincluding a maximum working temperature of 180F (82C).180 F (82 C). Requirements and test methods are included formaterials, workmanship,
4、 dimensions and tolerances, burst pressure, sustained pressure, excessive temperature and pressure, andthermo-cycling tests. The components covered by this specification are intended for use in residential and commercial, hot andcold, potable water distribution systems or other applications such as
5、municipal water service lines, radiant panel heating systems,hydronic baseboard heating systems, snow and ice melting systems, and building services pipe.1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notesand footnotes (exclu
6、ding those in tables and figures) shall not be considered as requirements of the specification.1.3 The values stated in inch-pound units are to be regarded as the standard. The values stated in parentheses are provided forinformation only.NOTE 1Suggested hydrostatic design stresses and hydrostatic p
7、ressure ratings for tubing and fittings are listed in Appendix X1. Design, assembly,and installation considerations are discussed in Appendix X2. An optional performance qualification and an in-plant quality control program arerecommended in Appendix X3.1.4 The following safety hazards caveat pertai
8、ns only to the test method portion, Section 7, of this specification: This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety safety, health, and healthenvironmental pra
9、ctices and determine the applicability ofregulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and R
10、ecommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal PressureD1599 Test Method for R
11、esistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology for Abbreviated Terms Relating to PlasticsD1898 Practice for Sampling of Plastics (Withdrawn 1998)3D2749 Symbols for Dimensions of Plastic Pipe FittingsD2837 Test Method for Obtaining Hydrostatic Design
12、 Basis for Thermoplastic Pipe Materials or Pressure Design Basis forThermoplastic Pipe ProductsD3140 Practice for Flaring Polyolefin Pipe and Tubing (Withdrawn 1999)3F412 Terminology Relating to Plastic Piping SystemsF876 Specification for Crosslinked Polyethylene (PEX) Tubing1 This specification is
13、 under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water.Current edition approved Aug. 1, 2011April 1, 2018. Published August 2011April 2018. Originally approved in 1984. Last previous approved 2011 asF877 11.F877 11a. D
14、OI: 10.1520/F0877-11A.10.1520/F0877-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved ve
15、rsion of this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all
16、changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100
17、 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1F1960 Specification for Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX)TubingF1961 Specification for Metal Mechanical Cold Flare Compression Fittings with Disc Spring for
18、Crosslinked Polyethylene(PEX) Tubing (Withdrawn 2018)3F1807 Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubingand SDR9 Polyethylene of Raised Temperature (PE-RT) TubingF1865 Specification for Mechanical Cold Expansion Insert Fitting
19、With Compression Sleeve for Cross-linked Polyethylene(PEX) Tubing (Withdrawn 2018)3F2080 Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe andSDR9 Polyethylene of Raised Temperature (PE-RT) PipeF2159 Specification for Plastic Insert Fitt
20、ings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX)Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) TubingF2434 Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubingand SDR9 Cross-linked Polyethylene/Al
21、uminum/Cross-linked Polyethylene (PEX-AL-PEX) TubingF2735 Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of RaisedTemperature (PE-RT) TubingF2854 Specification for Push-Fit Crosslinked Polyethylene (PEX) Mechanical Fittings for Crosslinked Polyeth
22、ylene (PEX)Tubing2.2 ANSI Standards:B 36.10 Welded and Seamless Wrought Steel Pipe4Z 17.1 Preferred Numbers42.3 AWWA Standard:Manual M-11, Steel Pipe Design and Installation52.4 Federal Standard:Fed Std. No. 123 Marking for Shipment (Civil Agencies)62.5 Military Standard:MIL-STD-129 Marking for Ship
23、ment and Storage62.6 NSF Standard:NSF/ANSI Standard No. 14 for Plastic Piping Components and Related Materials7NSF/ANSI Standard No. 61 for Drinking Water System Components-Health Effects73. Terminology3.1 The terminology used in this specification is in accordance with Terminology F412, Terminology
24、 D1600, and SymbolsD2749, unless otherwise specified. The abbreviation for crosslinked polyethylene is PEX. Plastic tubing denotes a particulardiameter schedule of plastic pipe in which outside diameter of the tubing is equal to the nominal size plus 18 in. Plastic pipe outsidediameter schedule conf
25、orms to ANSI B 36.10.3.2 Definitions of Terms Specific to This Standard:3.2.1 crosslinked polyethylene plasticsplastics prepared by crosslinking (curing) polyethylene compounds.3.2.2 fittingan appurtenance such as coupling, elbow or tee used to connect tubing or as an accessory to tubing.3.2.3 stand
26、ard dimension ratio (SDR)a selected series of numbers in which the average outside diameter to minimum wallthickness dimension ratios are constant for all sizes of tubing in each standard dimension ratio, and which are the ANSI Z 17.1Preferred Number Series R 10 modified by +1.3.2.4 manifoldan appur
27、tenance that has at least one inlet and multiple outlets.3.2.5 system componentsfittings and manifolds.4. Materials4.1 GeneralPEX systems shall use crosslinked polyethylene tubing as described in Specification F876.4.2 Fitting and manifold materials shall meet the applicable requirements as describe
28、d in Specifications F1807, F1865, F1960,F1961, F2080, F2159, F2434, F2735, or F2854.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from American Water Works Association (AWWA), 6666 W. Quincy Ave., Denver,
29、CO 80235, http:/www.awwa.org.6 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA19111-5098, http:/dodssp.daps.dla.mil.19111-5094, http:/quicksearch.dla.mil.7 Available from NSF International, P.O.
30、Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http:/www.nsf.org.F877 1824.3 CertificationPEX tubing and system components, used for the distribution of potable water, shall be products approvedfor that service by the regulatory bodies having such jurisdiction. These products shall be tes
31、ted for that service by a nationallyrecognized and accredited testing laboratory and shall bear the certification mark of the testing agency.5. Classification5.1 FittingsThis specification classifies fittings including manifolds, intended for use in systems with PEX tubing, by amaximum continuous us
32、e temperature that shall be 180F (82C)180 F (82 C) and by nominal sizes from 18 in. through 6 in.on the basis of resistance to burst pressure, hydrostatic sustained pressure, excessive temperature pressure capability, and bythermocycling. Fittings shall be compatible with tubing made to the requirem
33、ents of Specification F876.6. Requirements6.1 WorkmanshipFittings shall be made from materials that are homogeneous throughout and free of visible cracks, holes,foreign inclusions, or other defects. All sealing surfaces shall be smooth and free of foreign material. The walls of fittings andmanifolds
34、 shall be free of cracks, holes, blisters, voids, foreign inclusions, or other defects that are visible to the naked eye andmay affect fitting integrity.6.2 Dimensions and Tolerances:6.2.1 The dimensions and tolerances of fittings shall meet the specific requirements contained in Specifications F180
35、7, F1865,F1960, F1961, F2080, F2159, F2434, and F2735 or other recognized specification.6.2.2 Fittings shall be compatible with tubing made to the requirements of Specification F876.6.3 Corrosion ResistanceFittings shall be made from materials that are generally regarded as corrosion resistant.6.3.1
36、 Compliance with this specification requires that fittings contained in Specifications F1807, F1865, F1960, F1961, F2080,F2159, F2434, and F2735, and F2854 must meet the Performance and Test Method requirements of F877.6.4 Hydrostatic Burst:6.4.1 Tubing and fittings (tested as assemblies) assembled
37、using the manufacturers instructions shall meet the minimumhydrostatic burst requirements shown in Table 1 when tested in accordance with 7.6.6.4.2 Manifolds with integral shut-offs (valves) shall be tested with all ports in the full-open or unrestricted position.6.4.2.1 If the manifold has more tha
38、n one connection size, the test pressure selected from Table 1 shall be based upon the largestnominal PEX connection.6.5 Hydrostatic Sustained Pressure Strength6.5.1 Tubing and fittings (tested as assemblies) shall meet the minimum hydrostatic sustained pressure strength requirementsshown in Table 2
39、 when tested in accordance with 7.4.6.5.1.1 Manifolds with integral shut-off (valves) shall be tested with all ports in the full-open or unrestricted position.6.6 Thermocycling:6.6.1 Fittings, assembled using the manufacturers instructions, shall not leak after completion of 1000 cycles between thet
40、emperatures of 60F (16C) and 180F (82C)60 F (16 C) and 180 F (82 C) when tested in accordance with 7.5.6.6.1.1 Manifolds with integral shut-offs (valves) shall be tested with all ports in the full open or unrestricted position.6.7 Excessive TemperaturePressure Capability:6.7.1 GeneralIn the event of
41、 a water heating system malfunction, PEX tubing and system components shall have adequatestrength to accommodate short-term conditions, 48 h of 210F (99C),210 F (99 C), 150 psi (1034 kPa) until repairs can be made.6.7.2 Excessive Temperature Hydrostatic Sustained PressureTubing and system components
42、, when tested as assemblies, shallnot fail as defined in Test Method D1598 in less than 30 days (720 h) when tested in accordance with Test Method 7.7.6.7.2.1 Manifolds with integral shut-offs (valves) shall be tested with all ports in the full open or unrestricted position.TABLE 1 Burst Pressure Re
43、quirements forSDR9 PEX Tubing and System Component AssembliesNominal Tubing Size Minimum Burst Pressures atDifferent Temperaturesin. mm psiA at73.4F73.4 F(MPa) at(23C)(23 C)psiA at180F180 F(MPa) at(82.2C)(82.2 C)18 3 870 (6.00) 390 (2.69)14 7 752 (5.19) 336 (2.32)38 10 620 (4.27) 275 (1.90)12 13 480
44、 (3.31) 215 (1.48)58 andlarger16 and larger 475 (3.27) 210 (1.45)A The fiber stress for SDR9 PEX tubing used to derive this test pressure is:at 73.4F (23.0C)73.4 F (23.0 C) 1900 psi (13.10 MPa).at 180F (82.2C)180 F (82.2 C) 850 psi (5.86 MPa).F877 183NOTE 2Tests applicable to assemblies and bends (6
45、.4, 6.5, 6.6, and 6.7) are intended to be performance qualification tests and not tests required ofeach fitting.7. Test Methods7.1 ConditioningThe test specimens should be conditioned at 70 to 77F77 F (23 6 2C)2 C) and 50 6 5 % relativehumidity for not less than 40 h prior to test in accordance with
46、 Practice D618, for those tests where conditioning is required.7.2 Test ConditionsConduct the tests in the standard laboratory atmosphere of 70 to 77F77 F (23 6 2C)2 C) and 50 65 % relative humidity, unless otherwise specified in the test methods or in this specification.7.3 SamplingA sufficient qua
47、ntity of tubing and system components, as agreed upon by the purchaser and the seller, shall beselected and tested to determine conformance with this specification (see Practice D1898). In the case of no prior agreement,random samples selected by the testing laboratory shall be deemed adequate.7.4 H
48、ydrostatic Sustained Pressure Determine in accordance with Test Method D1598, except for the following:7.4.1 Test at least six joints, from randomly selected specimens assembled per the manufacturers instructions with at least5-pipe diameters between joints.7.4.2 Test temperature shall be 180 6 4F4
49、F (82 6 2C).2 C).7.4.3 The external test environment shall be air or water.7.4.4 FillCondition the specimens with water atin accordance with Test Method D1598a temperature of at least 120F (50C).7.5 Thermocycling:7.5.1 Summary of Test MethodThis test method describes a pass-fail test for thermally cycling PEX tubing and systemcomponent assemblies over a critical temperature range for a selected number of cycles while subjected to a nominal internalpressure. This test method provides a measure
