Designation:D2412−21StandardTestMethodforDeterminationofExternalLoadingCharacteristicsofPlasticPipebyParallel-PlateLoading1ThisstandardisissuedunderthefixeddesignationD2412;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofload-deflectioncharacteristicsofplasticpipeunderparallel-plateloading.1.2Thistestmethodcoversthermoplasticresinpipe,rein-forcedthermosettingresinpipe(RTRP),andreinforcedpoly-mermortarpipe(RPMP).1.3Thecharacteristicsdeterminedbythistestmethodarepipestiffness,stiffnessfactor,andloadatspecificdeflections.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.NOTE1—Whilethistestmethodcanbeusedinmeasuringthepipestiffnessofcorrugatedplasticpipeortubing,otherprofilewalldesigns,andproductsproducedfrompolyethylene,PVCorpolypropylene,specialconditionsandproceduresareused.Thesedetailsareincludedintheproductstandards,forexample,SpecificationsF667/F667M,F949,F2764/F2764M,andothers.1.5Thetextofthistestmethodreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthetestmethod.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,Gui...
