1、Designation: F 2158 08An American National StandardStandard Specification forResidential Central-Vacuum Tube and Fittings1This standard is issued under the fixed designation F 2158; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he 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 materials, dimensions and
3、 toler-ances, 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 valve mount-ing pla
4、tes 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 units that are pro
5、vided 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 the applica-bil
6、ity of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for TestingD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chlorid
7、e)(CPVC) CompoundsD 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD 2444 Test Method for Determination of the Impact Re-sistance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)D 2564 Specification for Solvent Cements for Poly(VinylChloride) (PVC)
8、 Plastic Piping SystemsD 2749 Symbols for Dimensions of Plastic Pipe FittingsD 5033 Guide for Development of ASTM Standards Relat-ing to Recycling and Use of Recycled Plastics3F 402 Practice for Safe Handling of Solvent Cements,Primers, and Cleaners Used for Joining Thermoplastic Pipeand FittingsF 4
9、12 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Definitions are in accordance with Terminology F 412,abbreviations are in accordance with Terminology D 1600, anddimension symbols are in accordance with SpecificationD 2749.3.2 Definitions of Terms Specific to This Standard:3.2.1 ce
10、ntral-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 central-vacuum
11、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, 13354,and 12223
12、, as defined in Specification D 1784. Compoundsthat have different cell classifications, because one or moreproperties are superior to those of the specified compounds, arealso acceptable.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct r
13、esponsibility of Subcommittee F17.25 on VinylBased Pipe.Current edition approved May 1, 2008. Published August 2008. Originallyapproved in 2001. Last previous edition approved in 2001 as F 215801.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at
14、 serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 Recycled MaterialThe use of recycle
15、d materials asdefined in Guide D 5033 is acceptable as long as the materialmeets the cell classification requirements in 5.1.5.3 Solvent CementWhere solvent cement is used to joinPVC tube and fittings, it shall meet the requirements ofSpecification D 2564.6. Requirements6.1 GeneralThe tube and fitti
16、ngs shall be homogeneousthroughout and free of visible cracks, holes, foreign inclusions,or other defects. They shall be as uniform as commerciallypracticable in color, opacity, density, and other physical prop-erties.6.1.1 Tube and Fitting FlatteningThere shall be no evi-dence of splitting, crackin
17、g, 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 manufacture shallnot be less than 20ftlbf (27 J), when tested in accordance with7.5.6.2 Dimensions and Tolerances:6.2.1 Tube Dim
18、ensionsThe tube dimensions shall meetthe requirements given in Table 1, when measured in accor-dance with Test Method D 2122.6.2.1.1 Tube LengthThe tolerance on the tube length shallbe 612 in. (612.5 mm).6.2.2 Fitting and Tube Hub DimensionsThe dimensionsof fittings and tube hubs shall meet the requ
19、irements of Table2 and Fig. 1, when measured in accordance with Test MethodD 2122.6.2.3 Belled TubeFor belled tube fabricated from tubesections, the thickness of the belled section shall be consideredsatisfactory if the bell was formed from tube meeting therequirements of Table 1.7. Test Methods7.1
20、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 adequate.7.2 Tube Test SpecimensFor testing in accordance with7.4 and 7.5, cut each test specimen from the selected tub
21、e 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 shall be permitted at the ambient temperature andhumidity of the manufacturers facility. For referee purposes,conditi
22、oning shall be in accordance with Procedure A ofPractice D 618.7.4 Tube and Fitting FlatteningFlatten three test speci-mens between parallel plates in a press until the distancebetween the plates is 40 % of the outside diameter of the tubeor fitting. The rate of loading shall be uniform and such tha
23、t 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 unaided eye.7.5 Impact ResistanceDetermine the impact resistance ofthe tube or fitting in accordance with Appendix X3.5, “P
24、roce-dureSpecification Requirement,” of D 2444. 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 all sixspecimens pass, accept the lot. If one specimen fails, testanother six specimens. If eleven of twelve specim
25、ens 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 tests shall be conducted again inaccordance with an agreement between the purchase and theseller. There shall be no a
26、greement 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 changing the specificationlimits. In retesting, the product requirements of this specifica-tion shall be met, and the te
27、st 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 specification.9. Product Marking9.1 Tube MarkingThe markings shall be applied to thetube in such a manner that they re
28、main 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 following information.9.2.1 The manufacturers name (or trademark).9.2.2 The designation “ASTM F 2158.”9.2.3 Nominal
29、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 designation ASTM F 2158.9.3.3 Nominal tube size.9.3.4 The material identification symbol, for example, PVC.10. Quality Assuran
30、ce10.1 When the product is marked with this designation,ASTM F 2158, the manufacturer affirms that the product wasTABLE 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 H
31、ub Dimensions, in. (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 610 % variation r
32、esultingfrom core shift is allowed. In such case, the average of the two opposite wallthicknesses shall equal or exceed the value shown in the table.F2158082FIG. 1 Typical Fitting ConfigurationsF2158083manufactured, inspected, sampled, and tested in accordancewith and has been found to meet the requ
33、irements of thisspecification.11. Keywords11.1 central vacuum; fittings; PVC; tubeAPPENDIXES(Nonmandatory Information)X1. STORAGEX1.1 Outside StoragePlastic tube should be stored on aflat surface or supported in a manner that will prevent saggingor bending. Do not store tube in direct sunlight for l
34、ongperiods. 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-out basis.X2. JOINTS AND CONNECTIONSX2.1 PVC tubing and fittings shall be joined by thesolvent-cement method.X2.2 When connecting t
35、o 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, usinga fine-tooth handsaw and a miter box. A rotary cutter may beused if the cutting blades are specifically designed for cutting
36、plastic 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.X3.2 Dry Fit TestThe solvent cement joint is designed sothat there will generally be interference of the tube wall withthe fitting s
37、ocket 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).X3.3 CleaningSurfaces to be joined must be cleaned andbe free of dirt, moisture, oil, and other foreign material. If thiscannot be accompli
38、shed by wiping with a clean, dry cloth, achemical or mechanical cleaner must be used. 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 w
39、hen not actually in use. Discard the cementwhen an appreciable change in viscosity 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, t
40、he cement shall be applied as quickly aspossible, consistent with good workmanship (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
41、cement to a minimum.(WarningApplication of cement to fitting socket is notrecommended 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 temperatur
42、esbelow freezing, 32F (0C), solvents penetrate and soften thePVC surfaces more slowly 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 aft
43、er applying acoat of cement to the tube, forcibly insert the tube into thesocket. To 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
44、 joint, the tube may back out of the fitting socket, if not heldin place for approximately 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 F 402, “Practice f
45、or Safe Handling ofSolvent Cements, Primers and Cleaners Used for JoiningThermoplastic Pipe and Fittings.”F2158084FIG. X3.1 Apparatus for Cutting TubeFIG. X3.2 Tube Entering Dry FittingFIG. X3.3 Uniform Application of Cement to Outside of TubeFIG. X3.4 Assembly of JointF2158085X4. METHODS OF JOINING
46、 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 cutting blades are specificallydesigned for cutting metal tube in such a way as not to raise aburr or ridge (flare) at th
47、e 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 material. If thiscannot be accomplished by wiping with a clean, dry cloth, achemical or mechanical cleaner must be used. if a
48、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 of joining metal tubing and fittings for usein low vacuum and pressure systems under 16 psig (Adhesive,Compression Coup
49、lings 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 intothe fitting socket. Make sure excess adhesive has not beenpushed to the inside diameter of the tubing (if any has, be su
