1、Designation: F 2158 01Standard 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, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification establishes requirements and testmethods for materials, dimensions and tolerances, flatteningresistance and impact r
3、esistance of plastic tubing for use incentral-vacuum systems for residential buildings.1.2 All notes and footnotes shall be considered as non-mandatory requirements of the specification.1.3 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses arem
4、athematical conversions to SI units, which are provided forinformation only and are not considered standard.1.4 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
5、and health practices and determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:D 618 Practice for Conditioning Plastics for Testing2D 1600 Terminology for Abbreviated Terms Relating toPlastics2D 1784 Specification for Rigid Poly (Vinyl Chlorid
6、e)(PVC) Compounds and Chlorinated Poly (Vinyl Chloride)(CPVC) Compounds2D 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and Fittings3D 2444 Test Method for Determination of the Impact Re-sistance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)3D 2564 Specifi
7、cation for Solvent Cements for Poly (VinylChloride) (PVC) Plastic Piping Systems3D 2749 Specification for Dimensions of Plastic Pipe Fit-tings3D 5033 Guide for Development of ASTM Standards Relat-ing to Recycling and Use of Recycled Plastic4F 402 Practice for Safe Handling of Solvent Cements,Primers
8、, and Cleaners Used for Joining Thermoplastic Pipeand Fittings3F 412 Terminology Relating to Plastic Piping Systems33. Terminology3.1 Definitions are in accordance with Terminology F 412,abbreviations are in accordance with Terminology D 1600, anddimension symbols are in accordance with Specificatio
9、nD 2749.3.2 Definitions of Terms Specific to This Standard: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 specific
10、ation are intended toprovide tube and fittings for 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 orgreate
11、r than that for poly (vinyl chloride) (PVC) 12454, 13354,and 12223, 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.5.2 Recycled MaterialThe use of recycled mater
12、ials 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 fittings sha
13、ll 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.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Syst
14、ems and is the direct responsibility of Subcommittee F17.25 onVinyl-Based Pipe.Current edition approved Dec. 10, 2001. Published February 2002.2Annual Book of ASTM Standards, Vol 08.01.3Annual Book of ASTM Standards, Vol 08.04.4Annual Book of ASTM Standards, Vol 08.03.1Copyright ASTM International,
15、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.1 Tube FlatteningThere shall be no evidence of split-ting, cracking, or breaking when the tube is tested in accor-dance with 7.4.6.1.2 Tube Impact StrengthThe impact strength of thetube at the time of manufacture
16、 shall not be less than 20ftlbf(27 J), when tested in accordance with 7.5.6.2 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 D 2122.6.2.1.1 Tube LengthThe tolerance on the tube length shall
17、be 612in. (612.5 mm).6.2.2 Fitting DimensionsThe dimensions of fittings shallmeet the requirements of Table 2, when measured in accor-dance with Test Method D 2122.7. Test Methods7.1 SamplingThe selection of tube samples shall be asagreed upon between the purchaser and seller. In case of noprior agr
18、eement, samples selected by a testing laboratory shallbe deemed adequate.7.2 Test SpecimensFor testing in accordance with 7.4 and7.5, 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.
19、3 ConditioningFor time-of-manufacture testing, condi-tioning shall be permitted at the ambient temperature andhumidity of the manufacturers facility. For referee purposes,conditioning shall be in accordance with procedure A ofPractice D 618.7.4 Tube FlatteningFlatten three test specimens betweenpara
20、llel plates in a press until the distance between the plates is40 % of the outside diameter of the tube. The rate of loadingshall be uniform and such that the flattening is completedwithin 2 to 5 min. On the removal of the load, the specimenshall pass if no splitting, cracking, or breaking is observ
21、edunder normal light with the unaided eye.7.5 Impact ResistanceDetermine the impact resistance ofthe tube in accordance with Appendix X3.5 “ProcedureSpeci-fication Requirement” of D 2444. Use either a 6lb (2.7kg) or a20-lb (9.1-kg) B tup and the flat plate (holder B). Test sixspecimens at an impact
22、of 20 ft lbf (27 joules). If 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 requirements
23、of this specification, the tests shall be conducted again inaccordance with an agreement between the purchase 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 ormodifyi
24、ng a test method, or by changing 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 mee
25、tthe requirements of this specification.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
26、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 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 tra
27、demark).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 Assurance10.1 When the product is marked with this designation,ASTM D 2158, the manufacturer affirms that the product wasmanufactured, inspected, sampled, and test
28、ed in accordancewith this standard and has been found to meet the requirementsof this specification.11. Keywords11.1 central vacuum; fittings; PVC; tubeTABLE 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
29、)0.070(1.78)TABLE 2 Fitting DimensionsNominalSizeSocketEntrance-DiameterSocketBottom-DiameterSocketDepth,minWallThick-ness,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 6
30、10 % variation resultingfrom core shift is allowed. In such case, the average of the two opposite wallthicknesses shall equal or exceed the value shown in the table.F 21582FIG. 1 Typical Fitting ConfigurationsF 21583FIG. 1 Typical Fitting Configurations (continued)F 21584APPENDIXES(Nonmandatory Info
31、rmation)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 longperiods. To prevent damage, fittings should not be stored wherethe temperature exceeds 100F (38C).X1.2 Inve
32、ntories of plastic tube should be used on a first-in,first-out basis.FIG. 1 Typical Fitting Configurations (continued)F 21585X2. JOINTS AND CONNECTIONSX2.1 PVC tubing and fittings shall be joined by thesolvent-cement method.X3. SOLVENT CEMENT JOINTSX3.1 Tube CuttingCut the tube square with the axis,
33、using a fine-tooth handsaw and a miter box. A rotary cutter maybe used if the cutting blades are specifically designed forcutting 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
34、.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 about13to23 of the socket depth (see Fig. X3.2).X3.3 Clean
35、ingSurfaces 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 used. If a chemicalcleaner is used, apply with an applicator. ( WarningSkincontact with che
36、mical cleaners should be avoided.)X3.4 Application Procedure:X3.4.1 Handling CementKeep the cement can closed andin a shady place when not actually in use. Discard the cementwhen an appreciable change in viscosity takes place or at thefirst sign of gelation. The cement should not be thinned. Keepthe
37、 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 (see Fig. X3.3).The surface temperature of the mating surfaces should notexceed 110F (
38、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 notrecommended and can cause drippings or an excess amount ofcement to be pushed to the inside dia
39、meter 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 slowly than in warmer weather. For thisreason, it is recommended that testing be done on a
40、 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. To distribute the cement evenly, turn the tube or fittinga14 turn during the process (s
41、ee Fig. X3.4).FIG. X3.1 Apparatus for Cutting TubeFIG. X3.2 Tube Entering Dry FittingFIG. X3.3 Uniform Application of Cement to Outside of TubeF 21586X3.4.6 Assembly should be completed within 20 s after theapplication of cement. (WarningUntil the cement is set inthe joint, the tube may back out of
42、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.)X4. SYSTEM INSTALLATIONX4.1 To determine the location of hose inlet-val
43、ves, iden-tify locations that will provide the maximum area of cleaningcoverage, usually on inside walls in hallways, near doorways,archways, and at the bottom of stairways. (WarningInstallation of a tubing system will vary depending on thearchitecture of the building; however, some features are com
44、-mon and are addressed. Other features are referenced in theManufacturers installation instructions.)X4.1.1 After locating the hose inlet-valve, (unless the hoseis shorter), use a 30 ft (9.1 m) length of cord or string to ensurethat the maximum area of cleaning coverage is accessible.Drawings or pla
45、ns may be used as well as the actual building.Floor plans are normally14 in. scale (1:50 cm). A 7 in. (180mm) piece of string or beaded chain will help determine theoptimum location. Keep in mind that furniture, doors, andother obstacles will prevent hoses from reaching the maximum30 ft (9.1 m), so
46、valve placement and quantity is important toensure that all areas to be cleaned can be reached by the hose.X4.1.2 Check the tubing path to avoid possible obstructions,such as heating ducts. Installation is best accomplished byrunning a trunk line leading from the farthest inlet valve to thepower uni
47、t with branch lines running to the individual valves.Lines may be installed in partitions, attics, and crawl spaces,under or between floor joists, or on faces of walls or columns.It is always best to keep trunk lines and branch lines as straightas possible without unnecessary bends and turns.X4.2 Re
48、commended Tools:a)12 in. (1.3 cm) right angle drill or12 in. (1.3 cm) drillb)214 in. (5.7 cm) hole saw or cutterc)14 in. (6.4 mm) masonry drill bitd) Common hacksaw or small handsaw with 18 teeth/ in.blade or 2 in. PVC tube cuttere) Miter boxf) Steel measuring tapeg) Screw driver (Philips)h) Screw d
49、river (slot)i) Wire connectors for #20 AWG (min) wirej) Side cuttersk) Hammerl) Wire coat hangerm) Pocket or utility knifen) Flashlighto) Drywall saw or jig sawp) Deburring and chamfering tool for PVC tubingq) Electrical taper) Propane or butane torchs) Safety glovest) Wire snippersX4.3 Installation of Hose Inlet Valves:X4.3.1 The hole in the wall for the hose inlet-valve shouldbe located between studs, clear of obstructions such as plumb-ing, wiring, and heat ducts.NOTE X4.1The minimum stud depth for sufficient clearance of anadapter
