Designation:C498–95StandardSpecificationforPerforatedClayDrainTile1ThisstandardisissuedunderthefixeddesignationC498;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoversperforateddraintilemadefromclay,shale,fireclay,ormixturesthereof,andfired.Inthisspecification,thetermperforateddraintileortileshallmeantilemadeonlyfromthesematerials.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:C4SpecificationforClayDrainTile23.Classes3.1Fourclassesofdraintilearecovered:3.1.1StandardPerforatedDrainTile,3.1.2Extra-QualityPerforatedDrainTile,3.1.3Heavy-DutyPerforatedDrainTile,and3.1.4Extra-StrengthPerforatedDrainTile.3.2Ahigherstrengthclassofperforateddraintilethanspecifiedbythepurchasermaybefurnishedandshallbeconsideredasmeetingthespecificationfortheclasscalledfor.4.Materials,Workmanship,andFinish4.1Presenceindraintileofanymineralsorchemicalsthatareknowntocauseslakingordisintegrationofthetileshallbedeemedvalidgroundsforrejection,unlesssatisfactoryproofissubmittedthatthetilearedurableandpermanent.4.2Draintileshallbefreeofcracks,checks,orchipsextendingintothebodyofthetileinsuchamanneraswoulddecreasethestrengthappreciably.Thereshallbenobreaksinthetilethatwouldadmitearthintothedrain.4.3Draintileshallbereasonablysmoothontheinsideandshallbeapproximatelycircularincrosssection,exceptwhenotherwisespecifiedinadvance.Perforationsshallbecleancutandthereshallbenoburrsprojectingintothetilewhichwouldinterferewiththefreeflowofwater.Tileshallbeapproxi-matelystraight,exceptinthecaseofspecialconnections.Theendsofbutt-endtileshallbesoregularandsmoothastomakepossibleclosejointsbyturningandpressingto...
