1、Designation: F512 12 (Reapproved 2017) An American National StandardStandard Specification forSmooth-Wall Poly(Vinyl Chloride) (PVC) Conduit andFittings for Underground Installation1This standard is issued under the fixed designation F512; the number immediately following the designation indicates t
2、he year of originaladoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for si
3、nglewall and coextruded cellular core smooth-wall poly(vinylchloride) conduit and fittings for underground communicationand electrical power wire and cables. Plastics which does notmeet the material requirements specified in Section 5 isexcluded from single layer and all coextruded layers.1.2 The va
4、lues given in parentheses are for informationonly.1.3 The following safety hazards caveat pertains only to thetest method portion, Section 8, 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 us
5、erof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Pr
6、inciples for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1600 Terminology forAbbreviated Terms R
7、elating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) CompoundsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2152 Test Method for Adequacy of Fusion of ExtrudedPoly(Vinyl Chloride) (PVC) Pip
8、e and Molded Fittings byAcetone ImmersionD2412 Test Method for Determination of External LoadingCharacteristics of Plastic Pipe by Parallel-Plate LoadingD2444 Test Method for Determination of the Impact Resis-tance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)D2466 Specificati
9、on for Poly(Vinyl Chloride) (PVC) PlasticPipe Fittings, Schedule 40D2564 Specification for Solvent Cements for Poly(VinylChloride) (PVC) Plastic Piping SystemsD2855 Practice for the Two-Step (Primer and Solvent Ce-ment) Method of Joining Poly (Vinyl Chloride) (PVC) orChlorinated Poly (Vinyl Chloride
10、) (CPVC) Pipe andPiping Components with Tapered SocketsF412 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Definitions are in accordance with Terminology F412and abbreviations are in accordance with Terminology D1600,unless otherwise specified. The abbreviation for poly(vinylchlorid
11、e) is PVC.3.2 Definitions of Terms Specific to This Standard:3.2.1 cellular plastica plastic containing numerous cells,intentionally introduced, interconnecting or not, distributedthroughout the mass.3.2.2 coextruded pipepipe consisting of two or moreconcentric layers of material bonded together in
12、processing byany combination of temperature, pressure, grafting, cross-linking or adhesion.3.2.3 coextrusiona process whereby two or more heatedor unheated plastic material streams, forced through one ormore shaping orifice(s), become one continuously formedpiece.3.2.4 external recycled materialindu
13、strial rework gener-ated by a different company manufacturing to this specifica-tion. Composition is known by the industrial source of thematerial.3.2.5 post-consumer recycled materialfinished goods thathave been purchased by the public, then returned to industry1This specification is under the juri
14、sdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.25 on VinylBased Pipe.Current edition approved April 1, 2017. Published April 2017. Originallyapproved in 1977. Last previous edition approved in 2012 as F51212. DOI:10.1520/F0512-12R17.2For
15、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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
16、West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World
17、 Trade Organization Technical Barriers to Trade (TBT) Committee.1and reprocessed into raw materials. Identity of finished goodsis known by the reprocessing company.3.2.6 certificate of compositiona certificate describing thecertain properties of an external recycled material of a postconsumer recycl
18、ed material.3.2.7 composition disclosurea document describing theformulation of an external recycled material.4. Classification4.1 This specification covers five types of undergroundconduit. There are two having lesser pipe stiffness values,designed primarily for concrete encased burial (EB), and th
19、reewith greater pipe stiffness values, designed primarily for directburial (DB). The complete designations follow:Type EB-20 Designed to be encased in concrete.Type EB-35 Designed to be encased in concrete.Type DB-60 Designed for direct burial without encasement in concrete.Type DB-100 Designed for
20、direct burial without encasement in concrete.Type DB-120 Designed for direct burial without encasement in concrete.4.2 This specification covers conduit with integral bells, orwith either separate or attached couplings.4.3 This specification covers molded and fabricated fittingsintended for use with
21、 all types of conduit.5. Materials5.1 Basic MaterialsThe conduit shall be made of virginhomopolymer PVC compound having a cell classification of12254, 121643(with a minimum tensile strength of 4000 psi(28 MPa), or 12264(with a minimum tensile modulus of500 000 psi) as defined in Specification D1784.
22、 Moldedfittings shall be made from PVC compound having a cellclassification of 12234 or 13343 as defined in SpecificationD1784. Homopolymer PVC compounds must equal or exceedthe requirements of the listed cell classification numbers.5.2 Rework MaterialsRework material from the manufac-turers own con
23、duit or fittings production may be used by thesame manufacturer, provided that the conduit or fittings pro-duced meet all of the requirements of this specification.Rework material from the manufactures coextruded cellularcore conduit shall be used in the core if it contains any residualblowing agent
24、. The pipe produced shall meet all of therequirements of this specification.5.3 Recycled PVC MaterialsRecycled PVC materials con-forming to the cell classification of this specification may beused provided they are clean and free from foreign materialsand provided that the conduit or fittings produc
25、ed meet allrequirements of this specification.5.4 Solvent CementThe solvent cement shall meet therequirements of Specification D2564.6. Requirements6.1 WorkmanshipThe conduit and fittings shall be homo-geneous throughout, and free from visible cracks, holes,foreign inclusions, or other injurious def
26、ects. The conduit andfittings shall be as uniform as is commercially practical incolor, opacity, density, and other physical properties.6.2 Dimensions:6.2.1 Dimensions shall be determined in accordance withTest Method D2122.6.2.2 The dimensions and tolerances of the conduit shall beas specified in T
27、able 1.6.2.3 LengthsConduit shall be supplied in lengths of 20 or25 ft, or as otherwise agreed upon between the purchaser andthe seller. A length shall be considered to be the overall lengthof the conduit, including integral bell, or coupling if attached,unless otherwise specified. Tolerance on leng
28、th shall be 61 in.(625 mm).6.2.4 Integral Bell Dimensions:6.2.4.1 Two systems of fit for integral bells are in commonuse. Unless otherwise specified, the manufacturer may employeither of them.6.2.4.2 Interference Fit SystemThe dimensions and toler-ances listed in Columns A and B of Table 1 in Specif
29、icationD2466 provide a satisfactory interference fit system betweenpipe and socket.6.2.4.3 Clearance Fit SystemThe dimensions and toler-ances listed in Table 2 of this specification provide a satisfac-tory clearance fit system.6.2.5 The wall thickness of integral bells and sweeps shallbe considered
30、satisfactory if formed from conduit which meetsthe minimum requirements of this specification.6.2.6 Socket depths for integral bells shall conform to therequirements listed in Table 2.3Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report
31、 RR:F17-1002.TABLE 1 Conduit Dimensions and Tolerances, in.NominalSizeAverageOutsideDiameterTolerance on Minimum Wall ThicknessAAverageOut-ofRoundBMinimum Modulus 400 000 psi Minimum Modulus 500 000 psiEB-20 EB-35 DB-60 DB-100 DB-120 EB-20 EB-35 DB-60 DB-100 DB-1201 1.315 0.005 0.060 0.060 0.060112
32、1.900 0.006 0.060 0.060 0.065 0.0602 2.375 0.006 0.060 0.060 0.065 0.083 0.060 0.060 0.0773 3.500 0.008 0.060 0.067 0.082 0.100 0.121 0.127 0.061 0.076 0.092 0.112 0.118312 4.000 0.008 0.100 0.078 0.095 0.115 0.138 0.147 0.072 0.088 0.107 0.128 0.1364 4.500 0.009 0.100 0.089 0.109 0.131 0.155 0.166
33、0.082 0.100 0.121 0.145 0.1545 5.563 0.010 0.100 0.112 0.136 0.164 0.192 0.205 0.103 0.126 0.152 0.179 0.1916 6.625 0.011 0.100 0.135 0.164 0.196 0.229 0.244 0.125 0.152 0.182 0.213 0.227ATolerance on wall thickness is +12, 0 % or +0.030, 0.000 in. whichever is greater.B“Out-of-round” is defined as
34、maximum diameter minus minimum diameter.F512 12 (2017)26.2.7 Integral belled ends shall be centered to provide avisible shoulder around the entire circumference.6.2.8 The inside diameters of spigot ends shall be chamferedas shown in Fig. 1.6.2.9 Fittings and Sweep Dimensions:6.2.9.1 The dimensions a
35、nd types of conduit fittings shall beas specified in Tables 3-17.6.2.9.2 Conduit fittings shall be capable of passing a ball14 in. (6 mm) less in diameter than the nominal size of theconduit.6.2.9.3 The dimensions of sweeps and bends shall be asspecified in Table 17. Sweeps and bends shall be made f
36、romDB-60 or DB-120 conduit. Sweeps made from DB-60 conduitare intended for use with EB-20 and DB-60 conduit. Sweepsmade from DB-120 conduit are intended for use with EB-35and DB-120 conduit.6.3 Minimum Pipe Stiffness:6.3.1 The minimum pipe stiffness ( F/y) values for conduitshall be in conformance w
37、ith Table 18, when tested inaccordance with 8.3. Three specimens shall be tested, all shallmeet the requirements.6.3.2 Referee TestThe minimum pipe stiffness (F/y)values shall be in accordance with Table 18 when tested inaccordance with Test Method D2412 at 5 % deflection.6.4 Impact StrengthThe mini
38、mum drop weight impactstrength values for conduit shall be as listed in Table 19, whentested in accordance with 8.1.6.4.1 The impact test is a quality control test, to be per-formed at the time of manufacture.6.5 Joint Tightness (Referee Test)The joints shall not leakwhen tested in accordance with 8
39、.2.6.6 Extrusion QualityThe conduit shall not flake or dis-integrate when tested in accordance with Test Method D2152.6.7 BondFor pipe produced by the coextrusion process,that is , pipe containing two or more concentric layers, the bondbetween the layers shall be strong and uniform. It shall not bep
40、ossible to separate any two layers with a probe or point of aknife blade so that the layers separate cleanly so the probe orknife blade moves freely between the layers. Nor shall sepa-ration of bond occur between layers during testing performedunder the requirements of this specification.7. Conditio
41、ning7.1 Referee TestingWhen conditioning is required forreferee tests, condition the specimens in accordance withProcedure A in Methods D618 at 23 6 2C and 50 6 5%relative humidity for not less than 40 h prior to test. Conducttests under the same conditions of temperature and humidity,unless otherwi
42、se specified.7.2 Quality Control:TABLE 2 Belled End Dimensions (Clearance Fit System), in.NominalSizeAverageEntranceDiameterAverageBottomDiameterToleranceonDiametersOut-ofRoundToleranceASocket Depthmin max1 1.331 1.320 0.005 0.060 1.000 1.750112 1.921 1.906 0.006 0.060 1.375 2.1252 2.400 2.381 0.006
43、 0.060 1.750 2.5003 3.538 3.508 0.008 0.060 2.875 3.625312 4.041 4.008 0.008 0.100 3.125 3.8754 4.544 4.509 0.009 0.100 3.375 4.1255 5.614 5.573 0.010 0.100 4.000 4.7506 6.687 6.636 0.011 0.100 5.000 5.750A“Out-of-round” is defined as maximum diameter minus minimum diameter.FIG. 1 Chamfer DetailTABL
44、E 3 Types of Conduit Fittings1. Couplings2. Domed caps3. Flat caps4. Fittings plugs5. Tapered plugs6. Bends (5, 2212, 30, 45, and 90)7. Sweeps (5, 2212, 30, 45, and 90)8. Angle Couplings (5)9. Fiber conduit adapters10. Cement-asbestos conduit adapters11. Water-tight expansion couplings12. Spigot-end
45、ed reducers13. Socket end-bellsTABLE 4 Fittings Socket Dimensions, in.NOTE 1Thermoformed fittings may employ the dimensions listed inTable 4, or the dimensions listed in Table 2 for integral bell ends.NominalSizeDimension AAverageEntranceDiameterDimension BAverageBottomDiameterToleranceonDiametersOu
46、t-of-RoundToleranceDimension CMinimumSocketDepth2 2.393 2.369 0.006 0.012 1.1253 3.515 3.492 0.008 0.015 1.594312 4.015 3.992 0.008 0.015 1.6874 4.515 4.491 0.009 0.015 1.7505 5.593 5.553 0.010 0.030 1.9376 6.658 6.614 0.011 0.030 2.125F512 12 (2017)37.2.1 For quality control tests, condition specim
47、ens for aminimum of3hinair,or1hinliquid at 23 6 2C (70 to77F). Test the specimens at 23 6 2C without regard torelative humidity.7.2.2 For the impact test, condition specimens for at least 30min at 0 to 1.6C (32 to 35F).8. Test Methods8.1 Impact ResistanceTest and evaluate five specimens,each 6 6116
48、in. (150 6 2 mm) long, in accordance with TestMethod D2444, using a 20-lb Tup B, and the flat plate (HolderB). When testing is performed at temperatures above 0C, nomore than 15 s shall elapse from the time of removal of thespecimen from the conditioning medium until completion ofthat test. Specimen
49、s may be positioned with a random surfaceuppermost, but must be located so that the contact point iscentered. All five specimens shall pass. If one specimen fails,test another five specimens: nine out of ten specimens passingshall be acceptable.TABLE 5 Coupling Dimensions, in.Nominal Size M, max SH, max N,min111364 0.070116112 2932 0.070116224764 0.075332333132 0.076764312 412 0.08776445132 0.0977645614 0.1189646712 0.140964TABLE 6 5 Angle Coupli
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