1、Designation:F194710Standard Practice forInstallation of Folded Poly(Vinyl Chloride)(PVC)Pipe intoExisting Sewers and Conduits1This standard is issued under the fixed designation F1947;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.Scope*1.1 This practice describes the procedures for the rehabili-tation of sewer lines and conduits(4 to 15 in.diameter)
3、by theinsertion of a folded PVC pipe,which is heated,pressurized,and expanded against the interior surface of an existing pipewith either a mechanical rounding device or steam pressure.The finished PVC pipe will be continuous and conform to theexisting conduit.This rehabilitation process can be used
4、 in avariety of nonpressure applications,such as:sanitary sewers,storm sewers,and process piping.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considere
5、d standard.1.3 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-bility of regulatory limitations prior to use.2.Refer
6、enced Documents2.1 ASTM Standards:2D790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride)(PVC)Compounds and Chlorinated Poly(Vi
7、nyl Chloride)(CPVC)CompoundsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsF412 Terminology Relating to Plastic Piping SystemsF1417 Practice for Installation Acceptance of Plastic Non-pressure Sewer Lines Using Low-Pressure AirF1504 Specification for Folded Poly(Viny
8、l Chloride)(PVC)Pipe for Existing Sewer and Conduit Rehabilitation2.2 NASSCO Standard:Recommended Specifications for Sewer Collection SystemRehabilitation33.Terminology3.1 Definitions Terminology used in this practice is inconformance with Terminology F412 and abbreviations used inthis practice are
9、in accordance with Terminology D1600,unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 containment tube,nan optional elastomeric materialplaced between the folded pipe and the existing pipe to protectthe folded pipe during insertion,for containment of steamduring th
10、e installation process,and to provide a waterproofbarrier against infiltration,inflow,and standing water.This tuberemains within the pipe but provides no structural support.3.2.2 dimples(dimpling),nWhere a side connection meetsthe existing pipe,there is not existing pipe support for the PVCpipe duri
11、ng expansion causing a point of thermoplastic pipeexpansion slightly beyond the existing pipe wall.This forma-tion of an external departure from the formed pipe wall istermed dimpling.3.2.3 folded pipe,nPVC pipe that has been manufacturedin a folded shape for use in existing pipeline rehabilitation(
12、seeFig.1).3.2.4 formed pipe,nfolded pipe that has been inserted intoan existing sewer or conduit and expanded with heat,pressure,and,if applicable,a rounding device to conform to and take theshape of the existing pipe(see Fig.1).3.2.5 insertion point,nan existing manhole,existing ac-cess shaft,or an
13、 excavated pit that serves as the point ofentrance for the folded pipe into the existing pipe.1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition appro
14、ved Nov.15,2010.Published January 2011.Originallyapproved in 1998.Last previous edition approved in 2004 as F1947 04.DOI:10.1520/F1947-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume info
15、rmation,refer to the standards Document Summary page onthe ASTM website.311521 Cronridge Drive,Suite J Owings Mills,MD 21117.www.nassco.org.*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.
16、United States1 3.2.6 rounded field sample,na rounded field sample isformed when the folded pipe has been inserted into a mold pipeand expanded with heat and pressure to conform to the moldpipe.3.2.7 rounding device,na flexible,bullet-shaped device,which may be used to unfold and expand the folded pipe tightlyagainst the wall of the existing pipe.3.2.8 termination point,nan existing manhole,existingaccess shaft,or an excavated pit that serves as the point of exitof the folded pipe from the existi
