1、Designation:F51212Standard 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 the year of originaladoption or,in the case of revisio
2、n,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers the requirements for singlewall and coextruded cellular core smooth-wall poly(vinylc
3、hloride)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 values given in parentheses are for informationonly.1.3 The follo
4、wing 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 userof this standard to establish appropriate safety and healthpractic
5、es and determine the applicability of regulatory limita-tions 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 Chl
6、orinated 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)Pipe and Molded Fittings byAcetone ImmersionD2412 Test Method for Determination of External Loading
7、Characteristics 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 Specification for Poly(Vinyl Chloride)(PVC)PlasticPipe Fittings,Schedule 40D2564 Specification for Solvent C
8、ements for Poly(VinylChloride)(PVC)Plastic Piping SystemsD2855 Practice for Making Solvent-Cemented Joints withPoly(Vinyl Chloride)(PVC)Pipe and FittingsF412 Terminology Relating to Plastic Piping Systems3.Terminology3.1 Definitions are in accordance with Terminology F412and abbreviations are in acc
9、ordance with Terminology D1600,unless otherwise specified.The abbreviation for poly(vinylchloride)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 c
10、oextruded pipepipe consisting of two or moreconcentric layers of material bonded together in 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 sha
11、ping orifice(s),become one continuously formedpiece.3.2.4 external recycled materialindustrial 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
12、purchased by the public,then returned to industryand 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 recycled material.3.2.7
13、 composition disclosurea document describing theformulation of an external recycled material.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.25 on VinylBased Pipe.Current edition approved Aug.1,2012.Pub
14、lished September 2012.Originallyapproved in 1977.Last previous edition approved in 2006 as F51206.DOI:10.1520/F0512-12.2For 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 th
15、e standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Classification4.1 This specification covers five types of undergroundc
16、onduit.There are two having lesser pipe stiffness values,designed primarily for concrete encased burial(EB),and threewith 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 direct burial without encasement in concrete.Type DB-120 Designed for direct burial witho
