1、Designation: F2855 12 An American National StandardStandard Specification forChlorinated Poly(Vinyl Chloride)/Aluminum/ChlorinatedPoly(Vinyl Chloride) (CPVC-AL-CPVC) Composite PressureTubing1This standard is issued under the fixed designation F2855; the number immediately following the designation i
2、ndicates 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 () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers a Chlorinate
3、d Poly(VinylChloride)/Aluminum/Chlorinated Poly(Vinyl Chloride),(CPVC AL CPVC), composite pressure tubing with a weldedaluminum tube reinforcement between the inner and outerlayers. The inner and outer CPVC layers are bonded to thealuminum tube by a melt adhesive. Included is a system ofnomenclature
4、 for the composite tubing, the requirements andtest methods for materials, the dimensions of the componentlayers and finished tubing, adhesion tests, hydrostatic burst andsustained pressure and thermocycling performance. Also givenare the requirements and methods of marking. The componentscovered by
5、 this specification are intended for use in residentialand commercial, hot and cold, potable water distributionsystems.NOTE 1The text of this standard references notes and footnotes whichprovide explanatory material. These notes and footnotes (excluding thosein tables and figures) shall not be consi
6、dered as requirements of thestandard.1.2 This specification covers only composite tubing incor-porating a continuously welded aluminum tube. Tubing con-sisting of metallic layers not continuously welded together areoutside the scope of this specification.1.3 Specifications for internal bushings for
7、use with com-posite tubing meeting the requirements of this specification aregiven in Annex A1.NOTE 2In order to assure the expected life expectancy of CPVC-AL-CPVC composite tubing by preventing corrosion of the Aluminum, abushing meeting the requirements of Annex A1 is required to be solventcement
8、ed into the cut ends of the CPVC-AL-CPVC tubing prior to makingsolvent cement joints in the piping. This bushing seals off the cut ends ofthe tubing preventing any contact of the AL layer with any liquids beingtransported by the tubing.1.4 Tubing meeting the requirements of this standard aredesigned
9、 to be used with fittings and solvent cements meetingthe requirements of Specification D2846/D2846M when as-sembled in accordance with Appendix X3.1.5 The products covered by this specification are intendedfor use with the distribution of pressurized liquids only, whichare chemically compatible with
10、 the tubing materials. Due toinherent hazards associated with testing components and sys-tems with compressed air or other compressed gases somemanufacturers do not allow pneumatic testing of their products.Consult with specific product manufacturers for their specifictesting procedures prior to pne
11、umatic testing.NOTE 3Pressurized (compressed) air or other compressed gasescontain large amounts of stored energy which present serious safetyhazards should a system fail for any reason.1.6 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathe
12、maticalconversions to SI units that are provided for information onlyand are not considered standard.NOTE 4Suggested hydrostatic design pressures and pressure ratingsfor tubing are listed in Appendix X1.1.7 The following safety hazards caveat pertains only to thetest method portion, Section 9. This
13、standard does not purportto address all of the safety concerns, if any, associated with itsuse. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1
14、 ASTM Standards:2D696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chl
15、oride)1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.61 on Water.Current edition approved April 1, 2012. Published May 2012. Originallyapproved in 2011. Last previous edition approved in 2011 as F28551
16、1. DOI:10.1520/F285512.2For referenced ASTM 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.*A Summary of Changes section appears
17、at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1(CPVC) CompoundsD1898 Practice for Sampling of Plastics (Withdrawn 1998)3D2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2837
18、Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe ProductsD2846/D2846M Specification for Chlorinated Poly(VinylChloride) (CPVC) Plastic Hot- and Cold-Water Distribu-tion SystemsD3167 Test Method for Floating Roller Peel
19、Resistance ofAdhesivesE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsF412 Terminology Relating to Plastic Piping SystemsF1281 Specification for Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX)Pressure Pipe2.2 Federal Standards:4Fed. Std. No. 123 Marking for Ship
20、ments (Civil Agencies)2.3 Military Standards:4MIL-STD-129 Marking for Shipment and Storage2.4 NSF Standards:5Standard No. 14 for Plastic Piping Components and RelatedMaterialsStandard No. 61 for Drinking Water Systems ComponentsHealth Effects3. Terminology3.1 Definitions:3.1.1 GeneralDefinitions use
21、d in this specification are inaccordance with Terminology F412 and abbreviations are inaccordance with Terminology D1600, unless otherwise speci-fied. The abbreviation for Aluminum is AL.3.2 Definitions of Terms Specific to This Standard:3.2.1 CPVC-AL-CPVC composite tubing, ncompositetubing produced
22、 by coextrusion or extrusion of layers ofCPVC/Aluminum/CPVC bonded together with a melt adhe-sive. This construction is also known as “multilayer”.3.2.2 tubing, n,For the purpose of this specification, pipemade the specific dimensions shown in Table 1.3.2.3 nominal tubing size (NTS), nA non-dimensio
23、naltubing sizing convention based on copper tubing sizing, CTS,dimensions in which the nominal measured OD is the NTS sizeplus 0.125 in. For example, NTS12 tubing has a nominal ODof 0.625 in.4. Classification4.1 TubingThis specification classifies CPVC-AL-CPVCcomposite tubing and CPVC bushings by a
24、maximum continu-ous operating condition of 100 psi (690 kPa) at 180F (82C)and by nominal tubing sizes of12 NTS ,34 NTS and 1 NTS.4.2 Pressure Design Basis The CPVC-AL-CPVC compos-ite tubing shall have an established pressure design basis at73F (23C) of 800 psi (5.52 MPa) or greater and at 180F(82C)
25、of 200 psi (1.38 MPa) or greater in accordance withTest Method D2837.5. Materials5.1 GeneralThe CPVC-AL-CPVC composite tubing iscomposed of an internal CPVC layer, adhesive layer, alumi-num layer, adhesive layer and external CPVC layer. For tubingmade to this specification, the constituent materials
26、 must meetthe following requirements:5.2 AluminumThe thickness of the aluminum layer shallmeet the dimensions and tolerance given in Table 1. The tensileproperties of the aluminum material shall be a minimum tensilestrength of 14,600 psi (100 MPa) and an elongation of 20%when tested in accordance wi
27、th Test Method E8/E8M.5.3 AdhesiveThe adhesive that bonds the CPVC layers tothe Aluminum layer shall be of sufficient strength that nodebonding of the layers occurs when the CPVC-AL-CPVCcomposite tubing is tested to all the requirements in Section 6of this standard and to the requirements for Hydros
28、tatic BurstStrength and CPVC Adhesives as specified in SpecificationD2846/D2846M.5.4 CPVCThe CPVC compound used to make the innerand outer layers shall meet the requirements specified in 5.4.1and 5.4.2.5.4.1 Short-Term PropertiesThe CPVC compound shallmeet the requirements of cell classification CPV
29、C 23447 asspecified in Specification D1784.5.4.2 Long-Term Hydrostatic StrengthThe CPVC com-pound shall have an established 180F (82C) hydrostatic3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
30、Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.5Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.TABLE 1 Outside Diameters, Wall Thicknesses, and Tolerances for CPVC-AL-CPVC Composite PipeNTSOutside
31、 Diameter, in. (mm) Inside Diameter, in. (mm) Wall Thickness, in. (mm)AverageTolerance onAverageAverageTolerance onAverageAluminum Inner CPVCLayerOuter CPVCLayerAverage Tolerance onAverageMinimum Minimum12 0.625(15.88)0.003(0.08)0.448(11.38)0.003(0.08)0.017(0.43)0.002(0.05)0.025(0.64)0.025(0.64)34 0
32、.875(22.23)0.003(0.08)0.691(17.55)0.004(0.10)0.017(0.43)0.002(0.05)0.028(0.71)0.028(0.71)1 1.125(28.58)0.003(0.08)0.932(23.67)0.005(0.13)0.017(0.43)0.002(0.05)0.034(0.86)0.034(0.86)F2855 122design stress of 500 psi (3.45 MPa) or greater in accordancewith Test Method D2837.5.5 Rework MaterialRework m
33、aterial generated fromCPVC-AL-CPVC composite tubing shall not be used.6. Requirements6.1 GeneralThe requirements and test methods in thisspecification cover CPVC-AL-CPVC composite tubing. Testson the individual layers that comprise this composite tubing areoutside the scope of this specification. Th
34、e raw materials used,however, must conform to the requirements as set out inSection 5.6.2 Dimensions and Tolerance of Tubing:6.2.1 Tubing DiameterThe minimum outside diameterand tolerances of the tubing shall meet the requirements givenin Table 1, when measured in accordance Test Method D2122.Maximu
35、m and minimum (out-of-roundness) tolerances applyonly to measurements made on tubing prior to coiling.6.2.2 Tubing Wall Thickness:6.2.2.1 Overall Tubing Wall ThicknessThe overall tubewall thickness shall meet the requirements given in Table 1,when measured in accordance with Test Method D2122. Themi
36、nimum wall thickness at any point of measurement of thetube shall not be less than the value specified in Table 1.6.2.2.2 CPVC Layer Wall ThicknessThe minimum wallthickness at any point of measurement of the tube shall not beless than the value specified in Table 1.NOTE 5An optical comparator has be
37、en found to be an excellentmethod for measuring the wall thickness of the various layers in piping.Aring is cut from the tubing and placed on the optical comparator formeasurement determination.6.2.3 Tubing LengthThe tubing shall be supplied coiled orin straight lengths as agreed upon with the purch
38、aser and withan allowable tolerance of +1 / -0 ft (+305 / -0 mm) for coils and+1/2 / -0 in. (+13 / -0 mm) for straight lengths.6.3 DelaminationCPVC-AL-CPVC tubing shall not showany separation of the CPVC layer from either side of thealuminum layer when tested in accordance with 9.2.6.4 Apparent Tens
39、ile Strength of TubingThe tube rings,when tested in accordance with the Ring Test Method of TestMethod F1281, shall meet the minimum strength as specifiedin Table 2.6.5 Hydrostatic Sustained PressureCPVC-AL-CPVC tub-ing shall meet the minimum hydrostatic sustained pressurerequirements of both test c
40、onditions shown in Table 3 whentested in accordance with the Hydrostatic Sustained PressureMethod of Specification D2846/D2846M.6.6 Requirements for the, installation required, CPVC bush-ings are in mandatory Annex A1.7. Requirements for Joints made with Solvent Cement7.1 CPVC-AL-CPVC joints made wi
41、th solvent cement shallmeet the Requirements for Solvent Cement and AdhesiveJoints of Specification D2846/D2846M as specified for:7.1.1 Hydrostatic Burst Strength7.1.1.1 The specimen size for the Hydrostatic BurstStrength shall be 1 NTS.7.1.2 Hydrostatic Sustained Pressure Strength7.1.3 Thermocyclin
42、g7.2 Special requirements for joining CPVC-AL-CPVC tub-ing are contained in mandatory Annex A1.8. Workmanship, Finish, and Appearance8.1 WorkmanshipThe composite tubing and associatedbushings shall be homogeneous throughout and free of visiblecracks, holes, foreign inclusions, or other defects. The
43、tubingand associated bushings shall be as uniform as commerciallypracticable in color, opacity, density, and other physical prop-erties.9. Test Methods for Tubing9.1 SamplingA sufficient quantity of composite tubing, asagreed upon between the purchaser and the seller, shall beselected from each lot
44、or shipment and tested to determineconformance with this specification (see Practice D1898). Inthe case of no prior agreement, random samples selected by thetesting laboratory shall be deemed adequate.9.1.1 Test SpecimensNot less than 50 % of the testspecimens required for any pressure test shall ha
45、ve at least apart of the marking in their central sections. The central sectionis that portion of tubing which is at least one tubing diameteraway from an end closure.9.2 Delamination TestCut two12 to 1 in. rings from thetubing to be tested. Using a band saw, slice each ringlengthwise into two appro
46、ximately equal semicircular, arc-shaped specimens. The Slice on the second ring shall be at 90from the slice on the first ring so that each of the fourspecimens represents one quadrant of the circumference of thepipe. One specimen must have the print line at the center of thearc. With pliers grasp t
47、he opposing ends of arc and bend backthe edges so that the outside edges of the arcs meet. When thebent specimen is visually inspected, failure is defined as anyseparation of the CPVC layer from either side of the aluminumlayer.10. Retest and Rejection10.1 If the results of any test(s) do not meet t
48、he require-ments of this specification, the tests(s) shall be conducted againTABLE 2 Minimum Tube Strength N (lb)12 NTS 2300 (515)34 NTS 2500 (560)1 NTS 2500 (560)TABLE 3 Minimum Hydrostatic Sustained Pressure Requirementsfor CPVC-AL-CPVC Tubing Assemblies Tested in Either Water orAir Bath External
49、Environment at 180F (82C)TestConditionTestDurationHydrostatic Test PressureWater Bath Air BathA 6 min 521 psi (3 590 kPa) 551 psi (3 800kPa)B 4 h 364 psi (2 510 kPa) 403 psi (2 780kPa)F2855 123only by agreement between the purchaser and seller. Undersuch agreement, minimum requirements shall not be lowered,changed, or modified, nor shall specification limits be changed.If upon retest, failure occurs, the quantity of product repre-sented by the test(s) does not meet the requirements of thisspecification.11. Product Ma
