Designation:D2122−16StandardTestMethodforDeterminingDimensionsofThermoplasticPipeandFittings1ThisstandardisissuedunderthefixeddesignationD2122;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofdiameter,wallthickness,andlengthdimensionsofthermoplasticpipe.Includedareproceduresformeasurementoftheinsidediam-eterofpipeintendedtobejoinedbyinternalfittings,measure-mentoftheaverageoutsidediameterforroundablepipewhereout-of-roundnessisnotofprimaryconcern,out-of-roundnessmeasurementandmeasurementoftheaverageoutsidediameterofnon-roundablepipe,andfordetermininglengthandstraight-ness.1.2Thistestmethodalsoincludesproceduresfordimen-sioningmoldedthermoplasticpipefittings.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD638TestMethodforTensilePropertiesofPlasticsD790TestMethodsforFlexuralPropertiesofUnreinforcedandReinforcedPlasticsandElectricalInsulatingMateri-alsF412TerminologyRelatingtoPlasticPipingSystemsF1498SpecificationforTaperPipeThreads60°forThermo-plasticPipeandFittings2.2ANSIStandard:3B2.1PipeThreads(ExceptDryseal)3.Terminology3.1Definitions:3.1.1General—DefinitionsareinaccordancewithTermi-nologyF412,unlessotherwisespecified.3.1.2deviationfromstraightness—themaximumdeviationfromastraightl...
