1、Designation: F2158 08 (Reapproved 2013) An American National StandardStandard Specification forResidential Central-Vacuum Tube and Fittings1This standard is issued under the fixed designation F2158; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se 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 covers the establishment of require-ments and test methods for material
3、s, dimensions andtolerances, flattening resistance and impact resistance of plastictubing for use in central-vacuum systems for residentialbuildings.1.2 All notes and footnotes shall be considered as nonman-datory requirements of the specification.1.3 This specification does not apply to: inlet valv
4、e mount-ing plates of fittings directly connected to these plates, reducerfittings, mufflers exhaust vents, or flex tubing attached at thepower unit location.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI uni
5、ts that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine
6、the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(
7、Vinyl Chloride)(CPVC) CompoundsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2444 Test Method for Determination of the Impact Resis-tance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)D2564 Specification for Solvent Cements for Poly(VinylChlor
8、ide) (PVC) Plastic Piping SystemsD2749 Symbols for Dimensions of Plastic Pipe FittingsD5033 Guide for Development ofASTM Standards Relatingto Recycling and Use of Recycled Plastics (Withdrawn2007)3F402 Practice for Safe Handling of Solvent Cements,Primers, and Cleaners Used for Joining Thermoplastic
9、Pipe and FittingsF412 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Definitions are in accordance with Terminology F412,abbreviations are in accordance with Terminology D1600, anddimension symbols are in accordance with SpecificationD2749.3.2 Definitions of Terms Specific to This S
10、tandard:3.2.1 central-vacuum tubing, npiping used for central-vacuum systems, that is O.D. controlled.3.2.2 unaided eye, nobservable without enhancement be-yond correction for normal vision.4. Significance and Use4.1 The requirements of this specification are intended toprovide tube and fittings for
11、 central-vacuum cleaning systems,used to convey debris from the vacuum inlets to the central-vacuum power units.5. Materials5.1 Basic MaterialsThe tube and fittings shall be made ofvirgin plastic having a cell classification of equivalent to orgreater than that for poly (vinyl chloride) (PVC) 12454,
12、 13354,and 12223, as defined in Specification D1784. Compounds thathave different cell classifications, because one or more prop-erties are superior to those of the specified compounds, are alsoacceptable.1This specification is under the jurisdiction of ASTM Committee F11 onVacuum Cleaners and is th
13、e direct responsibility of Subcommittee F11.50 on SpecialVacuum Cleaner Types.Current edition approved Dec. 1, 2013. Published December 2013. Originallyapproved in 2001. Last previous edition approved in 2008 as F215808. DOI:10.1520/F2158-08R13.2For referenced ASTM standards, visit the ASTM website,
14、 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.org.Copyright ASTM International, 10
15、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 Recycled MaterialThe use of recycled materials asdefined in Guide D5033 is acceptable as long as the materialmeets the cell classification requirements in 5.1.5.3 Solvent CementWhere solvent cement is used to joinP
16、VC tube and fittings, it shall meet the requirements ofSpecification D2564.6. Requirements6.1 GeneralThe tube and fittings shall be homogeneousthroughout and free of visible cracks, holes, foreign inclusions,or other defects. They shall be as uniform as commerciallypracticable in color, opacity, den
17、sity, and other physical prop-erties.6.1.1 Tube and Fitting FlatteningThere shall be no evi-dence of splitting, cracking, or breaking when the tube andfittings are tested in accordance with 7.4.6.1.2 Tube and Fitting Impact StrengthThe impactstrength of the tube and fittings at the time of manufactu
18、re shallnot be less than 20 ftlbf (27 J), when tested in accordance with7.5.6.2 Dimensions and Tolerances:6.2.1 Tube DimensionsThe tube dimensions shall meetthe requirements given in Table 1, when measured in accor-dance with Test Method D2122.6.2.1.1 Tube LengthThe tolerance on the tube length shal
19、lbe 612 in. (612.5 mm).6.2.2 Fitting and Tube Hub DimensionsThe dimensionsof fittings and tube hubs shall meet the requirements of Table2 and Fig. 1, when measured in accordance with Test MethodD2122.6.2.3 Belled TubeFor belled tube fabricated from tubesections, the thickness of the belled section s
20、hall be consideredsatisfactory if the bell was formed from tube meeting therequirements of Table 1.7. Test Methods7.1 SamplingThe selection of tube samples shall be asagreed upon between the purchaser and seller. In case of noprior agreement, samples selected by a testing laboratory shallbe deemed a
21、dequate.7.2 Tube Test SpecimensFor testing in accordance with7.4 and 7.5, cut each test specimen from the selected tube to aminimum of 6 618 in. (152 6 3.175 mm) in length. Deburr theedges of each specimen on the inner and outer diameter.7.3 ConditioningFor time-of-manufacture testing, condi-tioning
22、 shall be permitted at the ambient temperature andhumidity of the manufacturers facility. For referee purposes,conditioning shall be in accordance with Procedure A ofPractice D618.7.4 Tube and Fitting FlatteningFlatten three test speci-mens between parallel plates in a press until the distancebetwee
23、n the plates is 40 % of the outside diameter of the tubeor fitting. The rate of loading shall be uniform and such that theflattening is completed within 2 to 5 min. On the removal of theload, the specimen shall pass if no splitting, cracking, orbreaking is observed under normal light with the unaide
24、d eye.7.5 Impact ResistanceDetermine the impact resistance ofthe tube or fitting in accordance with Appendix X3.5, “Proce-dureSpecification Requirement,” of D2444. Use either a 6-lb(2.7-kg) or a 20-lb (9.1-kg) B tup and the flat plate (holder B).Test six specimens at an impact of 20 ftlbf (27 J). If
25、 all sixspecimens pass, accept the lot. If one specimen fails, testanother six specimens. If eleven of twelve specimens pass,accept the lot. If two or more specimens fail, reject the lot.8. Retest and Rejection8.1 If the results of any test(s) do not meet the requirementsof this specification, the t
26、ests shall be conducted again inaccordance with an agreement between the purchaser and theseller. There shall be no agreement to lower the minimumrequirements of this specification by such means as omittingtests that are a part of this specification, substituting ormodifying a test method, or by cha
27、nging the specificationlimits. In retesting, the product requirements of this specifica-tion shall be met, and the test methods designated in thespecification shall be followed. If, upon retest, failure occurs,the quantity of product represented by the test(s) does not meetthe requirements of this s
28、pecification.9. Product Marking9.1 Tube MarkingThe markings shall be applied to thetube in such a manner that they remain legible after installa-tion.9.2 Content of MarkingThe tube shall be marked at leastevery 5 ft (1.5 m) in letters not less than316 in. (5 mm) high,in a contrasting color, with the
29、 following information.9.2.1 The manufacturers name (or trademark).9.2.2 The designation “ASTM F2158.”9.2.3 Nominal Pipe Size (for example, 2 in. (50 mm).9.2.4 The material identification for example “PVC VacuumTubing.”9.3 Fitting Markings:9.3.1 Manufacturers name (or trademark).9.3.2 The designatio
30、n ASTM F2158.9.3.3 Nominal tube size.9.3.4 The material identification symbol, for example, PVC.TABLE 1 Outside Diameters and Tolerances for Vacuum Tubing,in. (mm)NominalTube SizeWall Thicknessmax min min max2 2.005(50.93)1.995(50.67)0.060(1.52)0.070(1.78)TABLE 2 Fitting and Tube Hub Dimensions, in.
31、 (mm)NominalSizeSocketEntrance-DiameterSocketBottom-DiameterSocketDepth,minWallThickness,minAminAmaxAOOR minAmaxAOOR2 2.005(50.93)2.015(51.18)+0.015(0.38)1.990(50.54)2.000(50.8)+0.015(0.38)0.730(18.54)0.085(2.16)AThe wall thickness is a minimum value except that a 10 % variation resultingfrom core s
32、hift is allowed. In such case, the average of the two opposite wallthicknesses shall equal or exceed the value shown in the table.F2158 08 (2013)2FIG. 1 Typical Fitting ConfigurationsF2158 08 (2013)310. Quality Assurance10.1 When the product is marked with this designation,ASTM F2158, the manufactur
33、er affirms that the product wasmanufactured, inspected, sampled, and tested in accordancewith and has been found to meet the requirements of thisspecification.11. Keywords11.1 central vacuum; fittings; PVC; tubeAPPENDIXES(Nonmandatory Information)X1. STORAGEX1.1 Outside StoragePlastic tube should be
34、 stored on aflat surface or supported in a manner that will prevent saggingor bending. Do not store tube in direct sunlight for longperiods. To prevent damage, fittings should not be stored wherethe temperature exceeds 100F (38C).X1.2 Inventories of plastic tube should be used on a first-in,first-ou
35、t basis.X2. JOINTS AND CONNECTIONSX2.1 PVC tubing and fittings shall be joined by the solvent-cement method.X2.2 When connecting to metal tubing systems, metaltubing and fitting shall be joined in accordance with AppendixX4.X3. SOLVENT CEMENT JOINTSX3.1 Tube CuttingCut the tube square with the axis,
36、 usinga fine-tooth handsaw and a miter box. A rotary cutter may beused if the cutting blades are specifically designed for cuttingplastic tube in such a way as not to raise a burr or ridge (flare)at the cut end (see Fig. X3.1). Remove all burrs with adeburring tool, knife, file, or abrasive paper.X3
37、.2 Dry Fit TestThe solvent cement joint is designed sothat there will generally be interference of the tube wall withthe fitting socket before the tube is fully inserted. Insert thetube into the fitting and check that the interference occurs about13 to23 of the socket depth (see Fig. X3.2).FIG. X3.1
38、 Apparatus for Cutting TubeFIG. X3.2 Tube Entering Dry FittingF2158 08 (2013)4X3.3 CleaningSurfaces to be joined must be cleaned andbe free of dirt, moisture, oil, and other foreign material. If thiscannot be accomplished by wiping with a clean, dry cloth, achemical or mechanical cleaner must be use
39、d. If a chemicalcleaner is used, apply with an applicator. (WarningSkincontact with chemical cleaners should be avoided.)X3.4 Application ProcedureX3.4.1 Handling CementKeep the cement can closed andin a shady place when not actually in use. Discard the cementwhen an appreciable change in viscosity
40、takes place or at thefirst sign of gelation. The cement should not be thinned. Keepthe applicator immersed in cement between applications.X3.4.2 Application of CementPVC solvent cement is fastdrying, and, therefore, the cement shall be applied as quickly aspossible, consistent with good workmanship
41、(see Fig. X3.3).The surface temperature of the mating surfaces should notexceed 110F (43C) at the time of assembly.X3.4.3 Apply cement lightly but uniformly to the outside ofthe tubing, taking care to keep the use of cement to a minimum.(WarningApplication of cement to fitting socket is notrecommend
42、ed and can cause drippings or an excess amount ofcement to be pushed to the inside diameter of the connectionthat can possibly snag debris and eventually create a clog.)X3.4.4 Low-Temperature ApplicationsAt temperaturesbelow freezing, 32F (0C), solvents penetrate and soften thePVC surfaces more slow
43、ly than in warmer weather. For thisreason, it is recommended that testing be done on a piece ofscrap tube to determine if satisfactory penetration of thesurfaces can be achieved.X3.4.5 Assembly of JointImmediately after applying acoat of cement to the tube, forcibly insert the tube into thesocket. T
44、o distribute the cement evenly, turn the tube or fittinga14 turn during the process (see Fig. X3.4).X3.4.6 Assembly should be completed within 20 s after theapplication of cement. (WarningUntil the cement is set inthe joint, the tube may back out of the fitting socket, if not heldin place for approx
45、imately 1 min after assembly. Care shouldbe taken during assembly not to disturb or apply any force tothe joints previously made, as early rough handling can destroyfresh joints.)X3.4.7 See Practice F402, “Practice for Safe Handling ofSolvent Cements, Primers and Cleaners Used for JoiningThermoplast
46、ic Pipe and Fittings.”FIG. X3.3 Uniform Application of Cement to Outside of TubeF2158 08 (2013)5X4. METHODS OF JOINING METAL TUBING AND FITTINGSX4.1 Tube CuttingCut the tube square with the axis, singa metal cutting blade in cutting blade in chop saw or band saw.Arotary cutter may be used if the cut
47、ting blades are specificallydesigned for cutting metal tube in such a way as not to raise aburr or ridge (flare) at the cut end. Remove all burrs with adeburring tool, file, or abrasive paper.X4.2 CleaningSurfaces to be joined must be cleaned andfree of dirt, moisture, oil, and other foreign materia
48、l. If thiscannot be accomplished by wiping with a clean, dry cloth, achemical or mechanical cleaner must be used. If a chemicalcleaner is used, apply with applicator. (WarningSkin contactwith chemical cleaners should be avoided.)X4.3 Assembly of JointThere are three popular and rec-ommended methods
49、of joining metal tubing and fittings for usein low vacuum and pressure systems under 16 psig (Adhesive,Compression Couplings and Shrink Sleeves). All of thesemethods provide secure connections eliminating the need forwelding or brazing.X4.3.1 AdhesiveThe best proven adhesive to bond metaltubing and fittings together is industrial contact cement. Forbest results, apply coatings of equal thickness on each cleansurface to be joined. Do not join immediately. When bothsurfaces are tacky to the touch, insert the tubing full depth
