ISO 24033 2025.docx

ISOInternationalStandardISO24033Thirdedition2025-06Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemperatureontheexpectedstrengthTubesenpolyethylenedemeilleureresistanceaIatemperature(PE-RT)InfluencedutempsetdeIatemperaturesurlaresistanceespereeReferencenumberISO24033:2025(en)COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Basicformulae25 Expectedstrength35.1 Extrapolationlimits35.2 Graphicalrepresentation45.3 Tabulatedvalues76 DemonstratingConformanCe87 Derivationofwallthicknesses8Annex A (normative)Demonstratingconformancetothereferencelines9Annex B (informative)DerivationOfSCalGmaXVallIeS10Bibliography14ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISO'sadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT工seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC138,Plasticspipes,fittingsandvalvesforthetransportoffluids,SubcommitteeSC5,Generalpropertiesofpipes,fittingsandvalvesofplasticmaterialsandtheiraccessoriesTestmethodsandbasicspecifications.Thisthirdeditioncancelsandreplacesthesecondedition(ISO24033:2009),whichhasbeentechnicallyrevised.Themainchangesareasfollows: FoITnUla3ofthereferencelineforPE-RTType1forIlOwasadded. FortheproceduretodemonstrateconformancetothereferencelinesinAnneXA,themethoddescribedinISO9080wasadditionallyimplemented. AnneXB,whichgivesadviceforthedimensioningofpipingcomponents,wasadded.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheuser'snationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/membnrs.htmLIntroductionAnincreasingnumberoftypesofpolyethylene(PE)polymers,madeinavarietyofprocesses,areavailableonthemarketfordifferentapplicationsinplasticpipingandductingsystems.Manyapplicationshavetheirownsystemstandardthatdefinesthepropertiesandrequirementsforthepipesandfittingsused.ThetypesofPEsuitableforuseinhotandcold-watersystemsarebasicallydifferentfromthoseforapplicationsatambienttemperatures,suchasinwatersupply,sewageanddrainage,andgaseousfuels.Therefore,itmakessensetodifferentiatethosePEmaterialshavingraisedtemperature-resistancebytermingthem"PE-RT”(forpolyethyleneofraisedtemperature).NOTEAbbreviatedtermbasedontheprovisionsof,andguidanceforpreparingnewabbreviatedtermsfor,basicpolymers,mixturesofpolymers,andrelatedtermsgiveninISO1043-1.Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemperatureontheexpectedstrength1 ScopeThisdocumentspecifiestheminimumvaluesforexpectedstrengthasafunctionoftimeandtemperatureintheformofreferencelines,foruseincalculationsonpipesmadeofa) polyethyleneofraisedtemperatureresistance(PE-RT)type