Designation:F876−15aStandardSpecificationforCrosslinkedPolyethylene(PEX)Tubing1ThisstandardisissuedunderthefixeddesignationF876;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverscrosslinkedpolyethylene(PEX)tubingthatincorporatesanoptionalpolymericinner,middleorouterlayerandthatisoutsidediametercontrolled,madeinnominalSDR9tubingdimensionratiosexceptwherenoted,andpressureratedforwateratthreetemperatures(seeAppendixX1).Includedarerequirementsandtestmethodsformaterial,workmanship,dimensions,burstpressure,hydrostaticsustainedpressure,excessivetemperaturepressure,environ-mentalstresscracking,stabilizerfunctionality,bent-tubehy-drostaticpressure,oxidativestabilityinpotablechlorinatedwater,anddegreeofcrosslinking.Requirementsfortubingmarkingsarealsogiven.1.2Thetextofthisspecificationreferencesnotes,footnotes,andappendixeswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthespecification.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportion,Section7,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementD1505TestMethodforDensityofPlasticsbytheDensity-GradientTechniqueD1598TestMethodforTime-to-Failureo...
