Designation:F1668−08StandardGuideforConstructionProceduresforBuriedPlasticPipe1ThisstandardisissuedunderthefixeddesignationF1668;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguidedescribesinstallationtechniquesandconsid-erationsforopen-cutconstructionofburiedpipe.Althoughthisguidewasdevelopedforplasticpipe,theconceptsofprovidingtheappropriatesoilsupport,careinhandling,correctjoiningtechniques,propersoilcompactionmethods,andpreventionofinstallationdamagemayapplytoanypipe.1.1.1Plasticpipereferstothermoplasticandfiberglasspipe.1.1.2Thermoplasticpipereferstopipefabricatedfrompolyvinylchloride(PVC),polyethylene(PE),acrylonitrile-butadienestyrene(ABS),polybutylene(PB),orpolypropylene(PP).AlistofASTMspecificationsfortheseproductsisgiveninAppendixX2.1.1.3Fiberglasspipereferstoaglass-fiber-reinforcedthermosetting-resinpipe.AlistofASTMspecificationsfortheseproductsisgiveninAppendixX2.NOTE1—AppendixX2cannotbeconsideredinclusivebecausetheremaybeunlisted,recentlyadoptedASTMspecificationsfornewproductsthatmaybeinstalledusingthisguide.NOTE2—OnlyafewoftheASTMspecificationslistedinAppendixX2includetheassociatedfittings.Whilethisguideappliestotheinstallationofpipe,couplings,andfittings,noattemptwasmadetolistallthepossiblefittingspecificationsthatmaybeusedinconjunctionwiththepipespecifications.Consulteachspecificationormanufacturerforappropriatefittingstandards.1.1.4Forsimplification,thetermpipewillbeusedinthisdocumenttomeanpipesections,fittings,andcouplings.1.2ThisguidecontainsgeneralconstructioninformationapplicableforplasticpipeandsupplementstheinstallationstandardsforthevarioustypesofpipeasdescribedinPracticesD2321,D2774,D3839,F690,F1176,andGuideF645.1.3Flexiblepipe,suchasthermoplasticandfiberglass,aretypicallydesignedtorelyonthestiffnessofthesoilsurro...
