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1、ISOInternationalStandardISO24033Thirdedition2025-06Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemperatureontheexpectedstrengthTubesenpolyethylenedemeilleureresistanceaIatemperature(PE-RT)InfluencedutempsetdeIatemperaturesurlaresistanceespereeReferencenumberISO24033:2025(en)C
2、OPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermi
3、ssion.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativer
4、eferences13 Termsanddefinitions14 Basicformulae25 Expectedstrength35.1 Extrapolationlimits35.2 Graphicalrepresentation45.3 Tabulatedvalues76 DemonstratingConformanCe87 Derivationofwallthicknesses8Annex A (normative)Demonstratingconformancetothereferencelines9Annex B (informative)DerivationOfSCalGmaX
5、VallIeS10Bibliography14ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteeha
6、sbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.Theproceduresusedtodevelo
7、pthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).I
8、SOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoim
9、plementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceof
10、usersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT工seeWWW.iso.org/iso/foreword.
11、htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC138,Plasticspipes,fittingsandvalvesforthetransportoffluids,SubcommitteeSC5,Generalpropertiesofpipes,fittingsandvalvesofplasticmaterialsandtheiraccessoriesTestmethodsandbasicspecifications.Thisthirdeditioncancelsandreplacesthesecondedition(ISO24033
12、:2009),whichhasbeentechnicallyrevised.Themainchangesareasfollows: FoITnUla3ofthereferencelineforPE-RTType1forIlOwasadded. FortheproceduretodemonstrateconformancetothereferencelinesinAnneXA,themethoddescribedinISO9080wasadditionallyimplemented. AnneXB,whichgivesadviceforthedimensioningofpipingcompone
13、nts,wasadded.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/membnrs.htmLIntroductionAnincreasingnumberoftypesofpolyethylene(PE)polymers,madeinavarietyofprocesses,areavailableonthemarketfordifferentapplicationsi
14、nplasticpipingandductingsystems.Manyapplicationshavetheirownsystemstandardthatdefinesthepropertiesandrequirementsforthepipesandfittingsused.ThetypesofPEsuitableforuseinhotandcold-watersystemsarebasicallydifferentfromthoseforapplicationsatambienttemperatures,suchasinwatersupply,sewageanddrainage,andg
15、aseousfuels.Therefore,itmakessensetodifferentiatethosePEmaterialshavingraisedtemperature-resistancebytermingthemPE-RT”(forpolyethyleneofraisedtemperature).NOTEAbbreviatedtermbasedontheprovisionsof,andguidanceforpreparingnewabbreviatedtermsfor,basicpolymers,mixturesofpolymers,andrelatedtermsgiveninIS
16、O1043-1.Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemperatureontheexpectedstrength1 ScopeThisdocumentspecifiestheminimumvaluesforexpectedstrengthasafunctionoftimeandtemperatureintheformofreferencelines,foruseincalculationsonpipesmadeofa) polyethyleneofraisedtemperatureresistance(PE-RT)type
