1、Designation: F2769 16Standard Specification forPolyethylene of Raised Temperature (PE-RT) Plastic Hot andCold-Water Tubing and Distribution Systems1This standard is issued under the fixed designation F2769; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n 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. Scope*1.1 This specification establishes requirements for polyeth-ylene of raised temperatu
3、re (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. Tu
4、bing may incorporatean optional polymeric inner, middle or outer layer. Testing ofSpecification F1807 and F2159 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 for m
5、aterials, 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 use
6、 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 of
7、 the specification.NOTE 1Suggested hydrostatic design stresses and hydrostatic pressureratings 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-manc
8、e 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 considered s
9、tandard.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 appropria
10、te safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method f
11、or Resistance to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1898 Practice for Sampling of Plastics (Withdrawn 1998)3D2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2749 Symbols for Di
12、mensions of Plastic Pipe FittingsD2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe ProductsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsD3895 Test Method for Oxidative-Induction Time of
13、 Poly-olefins by Differential Scanning CalorimetryF412 Terminology Relating to Plastic Piping SystemsF1282 Specification for Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure PipeF1473 Test Method for Notch Tensile Test to Measure theResistance to Slow Crack Growth of Polyethylene Pip
14、esand ResinsF1807 Specification for Metal Insert Fittings Utilizing aCopper Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) Tubing and SDR9 Polyethylene of Raised Tem-perature (PE-RT) TubingF2023 Test Method for Evaluating the Oxidative Resistance1This test method is under the jurisdiction of AST
15、M Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.26 on OlefinBased Pipe.Current edition approved Nov. 1, 2016. Published November 2016. Originallyapproved in 2009. Last previous edition approved in 2014 as F276914. DOI:10.1520/F2769-16.2For referenced AST
16、M 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.3The last approved version of this historical standard is referenced onwww.astm.
17、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 States1of Crosslinked Polyethylene (PEX) Pipe, Tubing andSystems to Hot Chlorinated WaterF2159 Specification for Plastic Ins
18、ert Fittings Utilizing aCopper Crimp Ring for SDR9 Cross-linked Polyethylene(PEX) Tubing and SDR9 Polyethylene of Raised Tem-perature (PE-RT) Tubing2.2 ANSI Standard:4B36.10 Standards Dimensions of Steel Pipe (NTS)Z 17.1 Preferred Numbers2.3 Federal Standard:5FED-STD-123 Marking for Shipment (Civil
19、Agencies)2.4 Military Standard:5MIL-STD-129 Marking for Shipment and Storage2.5 PPI Standards:6PPI 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 (MR
20、S)Ratings for Thermoplastic Piping Materials or PipePPI TR-4 PPI 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:7NSF 14 Standard No. 14 for Plasti
21、c Piping Components andRelated MaterialsNSF 61 Drinking Water System Components Health Ef-fects2.7 ISO Standard:8ISO 13760 : Plastics pipes for the conveyance of fluids underpressure - Miners rule - Calculation method for cumu-lative damage3. Terminology3.1 Terminology used in this standard is in ac
22、cordance withTerminologies F412, D1600, and D2749 unless otherwisespecified. 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
23、pipe outsidediameter schedule conforms to ANSI B36.10.3.2 standard 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 thepertin
24、ent number selected from the ANSI Preferred NumberSeries 10. F4123.2.1 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
25、 isless than 0.070 in. (1.78 mm) it shall be arbitrarily increased 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:3.3.1 hydrostatic design stress (HDS), nthe estimatedmaximum tensile stress the mate
26、rial is capable of withstandingcontinuously with a high degree of 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 SpecificationD3350, the HDS is equal
27、 to the hydrostatic design basis (HDB)times the design factor (DF) for water. For this standard, thedesign factor is equal to 0.5.HDS 5 HDB 3 DF5 HDB 30.5 for this standard!3.3.2 relation between dimensions, hydrostatic designstress, and pressure rating, nthe following expression, com-monly known as
28、 the ISO equation , is used in this specificationto relate dimensions, hydrostatic design stress, and pressurerating:2HDS/P 5 Do/t! 2 1 (1)or2HDS/P 5 R 2 1where:HDS = hydrostatic design stress, psi (or MPa),P = pressure rating, psig (or MPa),DO = average outside diameter, in. (or mm),t = minimum wal
29、l thickness, in. (or mm), andR = standard dimension ratio, SDR.3.3.3 standard 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 wi
30、th Specification D3350, the hydrostatic design stressfor water at 73F (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.3.3.3.1 DiscussionFurther information regarding testingand approva
31、l can be obtained from the National SanitationFoundation or other accredited 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
32、from18 through 6 in. 4.24.2 FittingsThis specification classifies fittings, 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 the4Available from American National Standard
33、s Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.5DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA19111-5094 http:/quicksearch.dla.mil/6Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plas
34、ticpipe.org.7Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.8Available from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.F2769 162ba
35、sis of resistance to burst pressure, hydrostatic sustainedpressure, excessive temperature and pressure, and thermocy-cling.5. Materials5.1 GeneralThe polyethylene used to make tubing shallbe virgin plastic or reworked plastic, or both, as specified in5.4, that meets the requirements of this standard
36、 and shall havea Plastic Pipe Institute (PPI) rating at 73F (23C) and 180F(82C). Fitting, manifold and valve materials shall meet theapplicable requirements as described in Specifications F1807or F2159. Fittings shall be made from materials that aregenerally regarded as corrosion resistant.5.2 Basic
37、 Tubing MaterialsPE-RT tubing 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
38、requirements:5.2.1.1 ClassificationPolyethylene materials suitable foruse in the manufacture of tubing under this specification shallbe classified in accordance with Specification D3350 as shownin Table 1.5.2.2 Long-Term Hydrostatic StrengthThis specificationcovers PE-RT tubing which is further defi
39、ned on the basis oflong-term 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 an op-tional interior wall, mid wall or outer wall layer or a combi-nation of such layers of non-PE-RT material for
40、the expresspurpose of providing gas barrier properties to the pipe. Thetubing shall meet the minimum wall thickness requirements ofthis standard without using the barrier layer thickness in thedeterminations. PE-RT tubing with a barrier layer within thewall of the tubing (neither exterior layer nor
41、interior layer)shall demonstrate 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 Materi
42、alClean rework material of the 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 Desi
43、gnationThe tubing meeting therequirements of this specification shall be designated PE-RT.5.6 CertificationTubing and fittings intended for use in thetransport of potable water shall be evaluated and certified assafe for this purpose by a testing agency acceptable to the localhealth authority. The e
44、valuation shall be in accordance 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 beo
45、btained from an accredited certification 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 physical
46、properties. For tubing that incorporates 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 F1807 and F2159 must meetthe Performance and T
47、est Method requirements of this 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 show
48、n in Table 4, when measured 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-RTmateria
49、l below that specified in Table 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-RoundnessThe maximum out-of-roundnessrequirements shown in Table 3 for tubing, apply to the averagemeasured diameter. Tubing shall be measured prior to coiling.6.3 Sustained PressureThe tubing and fittings, assembledusing the manufacturers instructions and tested as assemblies,shall not fail, balloon, burst, or weep at the
