Designation:D3839−14AnAmericanNationalStandardStandardGuideforUndergroundInstallationof“Fiberglass”(Glass-FiberReinforcedThermosetting-Resin)Pipe1ThisstandardisissuedunderthefixeddesignationD3839;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thispracticeestablishesproceduresfortheburialofpressureandnonpressure“fiberglass”(glass-fiber-reinforcedthermosetting-resin)pipeinmanytypicallyencounteredsoilconditions.Includedarerecommendationsfortrenching,plac-ingpipe,joiningpipe,placingandcompactingbackfill,andmonitoringdeflectionlevels.Guidanceforinstallationoffiberglasspipeinsubaqueousconditionsisnotincluded.1.2Productstandardsforfiberglasspipeencompassawiderangeofproductvariables.Diametersrangefrom1in.to13ft(25mmto4000mm)andpipestiffnessesrangefrom9toover72psi(60to500kPa)withinternalpressureratingsuptoseveralthousandpoundforcepersquareinch.Thisstandarddoesnotpurporttoconsiderallofthepossiblecombinationsofpipe,soiltypes,andnaturalgroundconditionsthatmayoccur.Therecommendationsinthispracticemayneedtobemodifiedorexpandedtomeettheneedsofsomeinstallationconditions.Inparticular,fiberglasspipewithdiametersofafewinchesaregenerallysostiffthattheyarefrequentlyinstalledinaccor-dancewithdifferentguidelines.Consultwiththepipemanu-facturerforguidanceonwhichpracticesareapplicabletotheseparticularpipes.1.3Thescopeofthispracticeexcludesproduct-performancecriteriasuchasaminimumpipestiffness,maxi-mumservicedeflection,orlong-termstrength.Suchparam-etersmaybecontainedinproductstandardsordesignspecifications,orboth,forfiberglasspipe.Itisincumbentuponthespecifiedproductmanufacturerorprojectengineertoverifyandensurethatthepipespecifiedforanintendedapplication,wheninstalledinaccordancewithprocedureso...
