1、Designation: F 2769 09Standard Specification forPolyethylene of Raised Temperature (PE-RT) Plastic Hot andCold-Water Tubing and Distribution Systems1This standard is issued under the fixed designation F 2769; the number immediately following the designation indicates the year oforiginal adoption or,
2、 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 establishes requirements for polyeth-ylene of raised temperat
3、ure (PE-RT) plastic hot- and cold-water tubing and distribution systems components made in onestandard dimension ratio and intended for 100 psig (6.9 bar)water service up to and including a maximum workingtemperature of 180F (82C). Components are comprised oftubing, fittings, valves and manifolds. T
4、ubing may incorporatean optional polymeric inner, middle or outer layer. Testing ofSpecification F 1807 and F 2159 fittings and PE-RT tubing tothe requirements of this standard indicate that these fittings areappropriate for use with PE-RT piping systems. Requirementsand test methods are included fo
5、r materials, workmanship,dimensions and tolerances, burst pressure, sustained pressure,oxidative resistance, temperature cycling tests, bend strengthand environmental stress cracking. Also included are testsrelated to system malfunctions. The components covered bythis specification are intended for
6、use in residential andcommercial, hot and cold, potable water distribution systems.1.2 The text of this specification references notes, footnotes,and appendixes which provide explanatory material. Thesenotes and footnotes (excluding those in tables and figures) shallnot be considered as requirements
7、 of the specification.NOTE 1Suggested hydrostatic design stresses and hydrostatic pres-sure ratings for tubing and fittings are listed in Appendix X1. UV labelingguidelines are provided in Appendix X2. Design, assembly, and installa-tion considerations are provided in Appendix X3. An optional perfor
8、-mance qualification and an in-plant quality control program are recom-mended in Appendix X4.1.3 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not conside
9、red standard.1.4 The following safety hazards caveat pertains only to thetest methods portion, Section 7, of this specification.Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appro
10、priate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for TestingD 1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD 1599 Test M
11、ethod for Resistance to Short-Time Hydrau-lic Pressure of Plastic Pipe, Tubing, and FittingsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1898 Standard Practice for Sampling of PlasticsD 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD 2749 Symbols for
12、 Dimensions of Plastic Pipe FittingsD 2837 Test Method for Obtaining Hydrostatic DesignBasis for Thermoplastic Pipe Materials or Pressure DesignBasis for Thermoplastic Pipe ProductsD 3350 Specification for Polyethylene Plastics Pipe andFittings MaterialsD 3895 Test Method for Oxidative-Induction Tim
13、e of Poly-olefins by Differential Scanning CalorimetryF 412 Terminology Relating to Plastic Piping SystemsF 1282 Specification for Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure PipeF 1473 Test Method for Notch Tensile Test to Measure theResistance to Slow Crack Growth of Polyethyl
14、ene Pipesand ResinsF 1807 Specification for Metal Insert Fittings Utilizing aCopper Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) TubingF 2023 Test Method for Evaluating the Oxidative Resis-tance of Crosslinked Polyethylene (PEX) Tubing and1This test method is under the jurisdiction of ASTM Com
15、mittee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.26 on OlefinBased Pipe.Current edition approved June 15, 2009. Published August 2009.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
16、Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Systems to Hot Chlorinated WaterF 2159 Specification for Plastic Insert
17、Fittings Utilizing aCopper Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) Tubing2.2 ANSI Standard:3B36.10 Standards Dimensions of Steel Pipe (NTS)Z 17.1 Preferred Numbers2.3 Federal Standard:4FED-STD-123 Marking for Shipment (Civil Agencies)2.4 Military Standard:5MIL-STD-129 Marking for Shipment
18、 and Storage2.5 PPI Standards:5PPI TR-3 Policies and Procedures for Developing Hydro-static Design Basis (HDB), Hydrostatic Design Stresses(HDS), Pressure Design Basis (PDB), Strength DesignBasis (SDB), and Minimum Required Strength (MRS)Ratings for Thermoplastic Piping Materials or PipePPI TR-4 PPI
19、 Listing of Hydrostatic Design Basis (HDB),Strength Design Basis (SDB), Pressure Design Basis(PDB) and Minimum Required Strength (MRS) Ratingsfor Thermoplastic Piping Materials or Pipe2.6 NSF Standards:6NSF 14 Standard No. 14 for Plastic Piping Components andRelated MaterialsNSF 61 Drinking Water Sy
20、stem Components HealthEffects2.7 ISO Standard:7ISO 13760 : Plastics pipes for the conveyance of fluidsunder pressure - Miners rule - Calculation method forcumulative damage3. Terminology3.1 Terminology used in this standard is in accordance withTerminologies F 412, D 1600, and D 2749 unless otherwis
21、especified. The abbreviation for polyethylene of raised tempera-ture is PE-RT. Plastic tubing denotes a particular diameterschedule of plastic pipe in which outside diameter of the tubingis equal to the nominal size plus18 in. Plastic pipe outsidediameter schedule conforms to ANSI B36.10.3.2 standar
22、d dimension ratio (SDR), na specific ratio ofthe average specified outside diameter to the minimum speci-fied wall thickness (D0/t) for outside diameter-controlled plas-tic pipe, the value of which is derived by adding one to thepertinent number selected from the ANSI Preferred NumberSeries 10. F 41
23、23.2.1 DiscussionFor PE-RT-tubing, it is calculated bydividing the average outside diameter of the tubing in inches orin millimeters by the minimum wall thickness in inches ormillimeters. If the wall thickness calculated by this formula isless than 0.070 in. (1.78 mm) it shall be arbitrarily increas
24、ed to0.070 in. except for sizes516 in. and smaller. The SDR valuesshall be rounded to the nearest 0.53.3 Definitions of Terms Specific to This Standard:3.4 hydrostatic design stress (HDS), nthe estimated maxi-mum tensile stress the material is capable of withstandingcontinuously with a high degree o
25、f certainty that failure of thetube will not occur. This stress is circumferential when internalhydrostatic water pressure is applied. For materials withHydrostatic Strength Classification 3 or 4 per SpecificationD 3350, the HDS is equal to the hydrostatic design basis(HDB) times the design factor (
26、DF) for water. For thisstandard, the design factor is equal to 0.5.HDS 5 HDB 3 DF5 HDB 3 0.5 for this standard!3.5 relation between dimensions, hydrostatic design stress,and pressure rating, nthe following expression, commonlyknown as the ISO equation , is used in this specification torelate dimensi
27、ons, hydrostatic design stress, and pressurerating:2HDS/P 5 Do/ t! 2 1or (1)2HDS/P5R 1where:HDS = hydrostatic design stress, psi (or MPa),P = pressure rating, psig (or MPa),DO = average outside diameter, in. (or mm),t = minimum wall thickness, in. (or mm), andR = standard dimension ratio, SDR.3.6 st
28、andard thermoplastic material designated code,nthe pipe material designation code shall consist of theabbreviation for the type of plastic (PE) followed by Arabicnumerals which describe the short term properties in accor-dance with Specification D 3350, the hydrostatic design stressfor water at 73F
29、(23C) in units of 100 psi with any decimalfigures dropped. Where the hydrostatic design stress codecontains less than two figures, a zero is used before the number.3.6.1 DiscussionFurther information regarding testingand approval can be obtained from the National SanitationFoundation or other accred
30、ited laboratory.4. Classification4.1 TubingThis specification covers one PE-RT tubingmaterial in one standard dimension ratio, 9.0, and by amaximum continuous use temperature that shall be 180F(82C), and by nominal tubing sizes from18 through 6 in. 4.24.2 FittingsThis specification classifies fittin
31、gs, includingmanifolds, intended for use in systems with PE-RT tubing, bya maximum continuous use temperature that shall be 180F(82C) and by nominal sizes from18 in. through 6 in. on thebasis of resistance to burst pressure, hydrostatic sustainedpressure, excessive temperature and pressure, and ther
32、mocy-cling.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.5Availab
33、le from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpipe.org.6Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.7Available from International Organization for Standardization (ISO), 1, c
34、h. dela Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.F27690925. Materials5.1 GeneralThe polyethylene used to make tubing shallbe virgin plastic and/or reworked plastic, as specified in 5.4,that meets the requirements of this standard and shall have aPlastic Pipe In
35、stitute (PPI) rating at 73F (23C) and 180F(82CC). Fitting, manifold and valve materials shall meet theapplicable requirements as described in Specifications F 1807or F 2159. Fittings shall be made from materials that aregenerally regarded as corrosion resistant.5.2 Basic Tubing MaterialsPE-RT tubing
36、 meeting therequirements of this specification are primarily defined by twocriteria namely, basic short-term properties, 5.2.1, and long-term hydrostatic properties, 5.2.2.5.2.1 Basic Short-Term PropertiesThis specification cov-ers tubing materials meeting the following requirements:5.2.1.1 Classifi
37、cationPolyethylene materials suitable foruse in the manufacture of tubing under this specification shallbe classified in accordance with Specification D 3350 as shownin Table 1.5.2.2 Long-Term Hydrostatic StrengthThis specificationcovers PE-RT tubing which is further defined on the basis oflong-term
38、 hydrostatic strength tests (Appendix X1). The ma-terial shall have a minimum pressure rating as per Table 2.5.3 Barrier LayersPE-RT tubing may incorporate anoptional interior wall, mid wall or outer wall layer or acombination of such layers of non-PE-RT material for theexpress purpose of providing
39、gas barrier properties to the pipe.The tubing shall meet the minimum wall thickness require-ments of this standard without using the barrier layer thicknessin the determinations. PE-RT tubing with a barrier layer withinthe wall of the tubing (neither exterior layer nor interior layer)shall demonstra
40、te a hydrostatic design stress (HDS) ratingequivalent to that of PE-RT tubing without a barrier layer. Thisdetermination shall be made in accordance with policies no lessrestrictive than those of the PPI TR-3 and meet the require-ments of this standard.5.4 Rework MaterialClean rework material of the
41、 samecommercial designation, generated from the manufacturersown tubing production shall not be used unless the tubingproduced meet all the requirements of this specification. PE-RTtubing with a barrier layer shall not be used for reworkmaterial.5.5 Tubing Material DesignationThe tubing meeting ther
42、equirements of this specification shall be designated PE-RT.5.6 CertificationTubing and fittings intended for use inthe transport of potable water shall be evaluated and certified assafe for this purpose by a testing agency acceptable to the localhealth authority. The evaluation shall be in accordan
43、ce with therequirements for chemical extraction that are not less restric-tive than those included in NSF Standard 61. The seal or markof the laboratory making the evaluation shall be included onthe tubing.NOTE 2Further information regarding testing and approval can beobtained from an accredited cer
44、tification provider.6. Requirements6.1 WorkmanshipThe tubing shall be homogeneousthroughout and free of visible cracks, holes, foreign inclusions,or other defects. The tubing shall be as uniform as commer-cially practicable in color, opacity, density, and other physicalproperties. For tubing that in
45、corporates a barrier layer per 5.3each layer shall meet the workmanship requirements per thissection.6.2 Dimensions and Tolerances:6.2.1 Compliance with this specification requires that fit-tings contained in Specifications F 1807 and F 2159 must meetthe Performance and Test Method requirements of t
46、his stan-dard.6.2.2 Outside Diameters of TubingThe outside diametersand tolerances of the tubing including the layers shall be asshown in Table 3, when measured in accordance with 7.4 and7.4.1.6.2.3 Wall Thickness of TubingThe wall thickness andtolerances shall be as shown in Table 4, when measured
47、inaccordance with 7.4 and 7.4.2.6.2.3.1 LayerTubing that incorporates an inner, middle orouter layer shall meet the minimum wall thickness andtolerances requirements as specified in Table 4. In addition, thelayer shall not result in the reduction of the total PE-RTmaterial below that specified in Ta
48、ble 4. In the case of tubingwith a middle layer, the total base PE-RT material wallthickness shall be the sum of the inner and outer base PE-RTmaterial wall thicknesses.6.2.4 Out-of-Roundness The maximum out-of-roundnessrequirements shown in Table 3 for tubing, apply to the averagemeasured diameter
49、after rounding with a rounding tool recom-mended by the manufacturer.6.3 Sustained PressureThe tubing and fittings, assembledusing the manufacturers instructions and tested as assemblies,shall not fail, balloon, burst, or weep at the test pressures giveninTable 5 when tested in accordance with 7.5.6.3.1 If present, valves shall be tested in the open orunrestricted position.6.4 Burst PressureThe tubing and fittings, assembledusing the manufacturers instructions and tested as assemblies,shall meet the minimum burst pressure give
