Designation:D2666–96aAnAmericanNationalStandardStandardSpecificationforPolybutylene(PB)PlasticTubing1ThisstandardisissuedunderthefixeddesignationD2666;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverspolybutylene(PB)tubingthatisoutsidediametercontrolled,madeinstandardthermoplastictubingdimensionratiosandpressureratedforwater(seeAppendix).IncludedarecriteriaforclassifyingPBplastictubing;asystemofnomenclatureforPBplastictubing;andrequirementsandtestmethodsformaterials,workmanship,dimensions,sustainedpressure,andburstpressure.Methodsofmarkingarealsogiven.1.2Thetextofthisspecificationreferencesnotes,footnotes,andappendixeswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthespecification.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.1.4Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportion,Section7,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.2.ReferencedDocuments2.1ASTMStandards:D618PracticeforConditioningPlasticsforTesting2D1598TestMethodforTime-to-FailureofPlasticPipeUnderConstantInternalPressure3D1599TestMethodforShort-TimeHydraulicFailurePres-sureofPlasticPipe,Tubing,andFittings3D1600TerminologyforAbbreviatedTermsRelatingtoPlastics2D1603TestMethodforCarbonBlackinOlefinPlastics2D1708TestMethodforTensilePropertiesofPlasticsbyUseofMicrotensileSpecimens2D2122TestMethodforDeterminingDimensionsofTher-moplasticPipeandFittings3D2581SpecificationforPolybutylen...
