Designation:F690–86(Reapproved2003)e2AnAmericanNationalStandardStandardPracticeforUndergroundInstallationofThermoplasticPressurePipingIrrigationSystems1ThisstandardisissuedunderthefixeddesignationF690;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.e1NOTE—KeywordseditoriallyaddedinNovember2003.e2NOTE—EditorialchangesweremadethroughoutinDecember2004.1.Scope1.1Thispracticecoversgeneralandbasicproceduresre-latedtotheproperinstallationofthermoplastic,flexible,pressurepiping,36in.nominalsizeandsmaller,forunder-groundirrigationsystems.Becausethereisconsiderablevari-abilityinend-userequirements,soilconditions,andthermo-plasticpipingcharacteristics,itistheintentofthispracticetooutlinegeneralobjectivesandbasicsofproperinstallationandtoprovidepertinentreferences,ratherthantoprescribedetailedinstallationprocedures.1.2Thispracticeshouldnotbeusedforinstallingthermo-plasticundergroundsewer,drain,potablewater,conduit,orgasservicepiping.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Valuesinparenthesesaremathematicalcon-versionstoSIthatareprovidedforinformationalpurposesonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2487TestMethodforClassificationofSoilsforEngi-neeringPurposes(UnifiedSoilClassificationSystem)D2488PracticeforDescriptionandIdentificationofSoils(Visual-ManualProcedure)F402PracticeforSafeHandlingofSolventCements,Primers,andCleanersUsedforJoiningThermoplasticPipeandFittings3.JointsandConnections3.1Jointsandconnectionsshallbeassembledtowithstandthedesignworkingpressureforthepipeline...
