1、BSISO24033:2025Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemperatureontheexpectedstrengthbsi.NationalforewordThisBritishStandardistheUKimplementationofISO24033:2025.ItsupersedesBSISO24033:2009,whichiswithdrawn.TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitt
2、eePRI88,Plasticspipingsystems.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbemade,andnoresponsibili
3、tyorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.Therecipientisadvisedtocon
4、siderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited2025ISBN9780539296310ICS23.040.20CompliancewithaBritishStandardcannotconf
5、erimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30June2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedBSISO24033:2025InternationalStandardISO24033Thirdedition2025-06Polyethyleneofraisedtemperatureresistance(PE-R
6、T)pipesEffectoftimeandtemperatureontheexpectedstrengthTubesenpolyethylenedemeilleureresistanceaIatemperature(PE-RT)InfluencedutempsetdeIatemperaturesurlaresistanceespereeReferencenumberISO24033:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontext
7、ofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryofthereq
8、uester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Basicformulae25 Expectedstrength35.1 Extrapolationlimits35.2 Gr
9、aphicalrepresentation45.3 Tabulatedvalues76 Demonstratingconformance87 Derivationofwallthicknesses8Annex A (normative)Demonstratingconformancetothereferencelines9Annex B (informative)Derivationof5calcmaxvalues10Bibliography14ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefede
10、rationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentala
11、ndnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inpa
12、rticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).
13、ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,Implementersarecautionedthatthismaynotrepresentthelatestinformation,wh
14、ichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningo
15、fISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC138,Plasticspipes,fittingsandvalvesforthetra
16、nsportoffluids,SubcommitteeSC5,Generalpropertiesofpipes,fittingsandvalvesofplasticmaterialsandtheiraccessoriesTestmethodsandbasicspecifications.Thisthirdeditioncancelsandreplacesthesecondedition(ISO24033:2009),whichhasbeentechnicallyrevised.Themainchangesareasfollows: FomIUla(3)ofthereferencelinefor
17、PE-RTType1forIlOwasadded. FortheproceduretodemonstrateconformancetothereferencelinesinAnneXA,themethoddescribedinISO9080wasadditionallyimplemented. ArmeXB,whichgivesadviceforthedimensioningofpipingcomponents,wasadded.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody
18、Acompletelistingofthesebodiescanbefoundatwww.iso.orq/membnrs.html.IntroductionAnincreasingnumberoftypesofpolyethylene(PE)polymers,madeinavarietyofprocesses,areavailableonthemarketfordifferentapplicationsinplasticpipingandductingsystems.Manyapplicationshavetheirownsystemstandardthatdefinesthepropert
19、iesandrequirementsforthepipesandfittingsused.ThetypesofPEsuitableforuseinhotandcold-watersystemsarebasicallydifferentfromthoseforapplicationsatambienttemperatures,suchasinwatersupply,sewageanddrainage,andgaseousfuels.Therefore,itmakessensetodifferentiatethosePEmaterialshavingraisedtemperature-resist
20、ancebytermingthemPE-RT”(forpolyethyleneofraisedtemperature).NOTEAbbreviatedtermbasedontheprovisionsof,andguidanceforpreparingnewabbreviatedtermsfor,basicpolymers,mixturesofpolymers,andrelatedtermsgiveninISO1043-1.BSISO24033:2025Polyethyleneofraisedtemperatureresistance(PE-RT)pipesEffectoftimeandtemp
21、eratureontheexpectedstrength1 ScopeThisdocumentspecifiestheminimumvaluesforexpectedstrengthasafunctionoftimeandtemperatureintheformofreferencelines,foruseincalculationsonpipesmadeofa) polyethyleneofraisedtemperatureresistance(PE-RT)typeLandb) polyethyleneofraisedtemperatureresistance(PE-RT)typeIL2 N
22、ormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO1167-1,Thermoplasticspi
23、pes,fittingsandassembliesfortheconveyanceoffluidsDeterminationoftheresistancetointernalpressurePart1:GeneralmethodISO1167-2,Thermoplasticspipes,fittingsandassembliesfortheconveyanceoffluidsDeterminationoftheresistancetointernalpressurePart2:PreparationofpipetestpiecesISO9080:2012,Plasticspipinganddu
24、ctingsystemsDeterminationofthelong-termhydrostaticstrengthofthermoplasticsmaterialsinpipeformbyextrapolation3 TermsanddefinitionsForthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses: ISOOnlinebrowsingpla
25、tform:availableathttps:WWW.iso.org/obp IECElectropedia:availableathttps:WWW.electropedia.org/1.1referencelinesgenericdescriptionoftheminimumlong-termhydrostaticstrengthtobeexpectedfromaparticularpolymer.Note1toentry:Referencelinesarenottobeconsideredascharacteristicofaspecificgradeorofmaterialfromas
26、pecificsupplier.Note2toentry:Thelinesaredescribedbyamathematicalequationwhichpermitsinterpolationandextrapolationinanunambiguouswaywithintheapplicabletemperatureandtimeranges.Note3toentry:ThereferencelinesforPE-RThavebeenagreeduponbyagroupofISO/TC138SC5expertsafterconsideringexperimentaldataandhaveb
27、eenacceptedbytherelevanttechnicalcommitteesinISO.4 BasicformulaeThereferencelinesforPE-RTingeneralcanbeappliedtotemperaturesbetween20and110.ThereferencelinesforPE-RTTypeLdescribedbyFormulae(1)and(2),areapplicablefortemperaturesbetween20and95.Firstbranch:IOgIot=A1+B1T+C1log10+(D173log10(1)Secondbranc
28、h:log10t=A2+B2T+C2log10+(D2Tr)log10(2)wheretisthetime,inhours;Tisthetemperature,inKelvin;isthehoopstress,inMegapascal.ThelowervalueobtainedfromFOrmUIa(1)orFormula(2),respectively,representstheexpectedhoopstrength.Firstbranch:A1=-190,481B1=78763,07C1=119,877D1=-58219,035Iog101=-190,481+78763,07/T+119
29、877Iog10-(58219,035)Iog10Secondbranch:A2=-23,7954B2=11150,56C2=D2=-I723,318Iog101=-23,7954+11150,56T(1723,318/T)Iog10The110valueshavebeendeterminedseparatelyusingwaterinsideandairoutsidethetestspecimenandhavenotbeenderivedfromFormUlaeand2).ThereferencelineforPE-RTTypeLapplicablefor110oClisdescribed
30、byFOmIUIa(3):Iogiot=A3+B3T+C3Iog10+(D3T)Iog10A3=12,789B3=C3=-33,829D3=0Iog101=12,789-33,829Iog10ThereferencelinesforPE-RTTypeILdescribedbyFOrmUIa(4),areapplicablefortemperaturesbetween20and110.Iogiot=A+BT+CIog10+(DT)Iog10(4)A=-219B=90635,353C=126387D=-62600,752Iog101=-219+90635,353/T+126,3871OgIO-(6
31、2600,752/QIog105 Expectedstrength5.1 ExtrapolationlimitsTheextrapolationlimits,i.e.ltimelimitforwhichextrapolationisallowed,arebasedonanexperimentallydeterminedtimeat110andtheArrheniusequationforthetemperaturedependence,withanactivationenergyof110kj/mol(26kcal/mol).SeeISO9080:2012,5.2.Thevaluesgiven
32、inTable1aretheminimumrequiredextrapolationtimelimitsforPE-RTmaterialsaccordingtothisdocument.Table1Minimumextrapolationtimelimits(basedon1yeartestingat110)TemperatureExtrapolationtimelimityears110a96to1002,591to95486to90681to851276to801871to753061to705060100aExperimentallydetermined.Withtestingcondi
33、tionsotherthan1yearat110oCltheextrapolationlimitshallbecalculatedusingtheextrapolationfactorsgiveninISO9080:2012,5.25.2 GraphicalrepresentationFigUre1containsthereferencelinesforPE-RTTypeIcorrespondingtothevaluesoftheparametersgiveninClaUSe4withextrapolationtimelimitsbasedontestingof1yearat110.FigUr
34、e2containsthereferencelinesforPE-RTTypeIIcorrespondingtothevaluesoftheparametersgiveninCIaUSe4withextrapolationtimelimitsbasedontestingof1yearat110.KeyXlX2YXltime（三）time(years)stress(MPa)Figure1ExpectedstrengthofPE-RTTypeIXlKeyXltime（三）X2timeyears)Ystress(MPa)Figure2ExpectedstrengthofPE-RTTypeII5.3T
35、abulatedvaluesThecalculatedhoopstrengthvaluesforPE-RTTypeIandTypeIItobeusedforvarioustemperaturesandtimesaregiveninTable2.Thesevaluesincludenosafetyfactorsordesignfactors.TheyarebasedonextrapolatedtimelimitsasgiveninTabIe1.Table2ExpectedhoopstrengthvaluesofPE-RTforvarioustimeandtemperaturevalueswith
36、extrapolatedtimelimitsasgiveninTable1TemperatureTimeyearsExpectedstrengthofPE-RTTypeIMPaExpectedstrengthofPE-RTTypeIIMPa2018,89,858,69,6108,59,5258,49,4508,49,31008,39,33018,18,957,8,71098,6257,8,55088,51007,8,44017,38,057,17,8107,17,8257,07,7506,97,61006,87,55016,67,256,47,0106,36,9256,26,8506,26,7
37、1006,16,76015,86,355,76,1105,66,1255,56,0505,45,91005,35,87015,15,454,95,3104,85,2254,75,1504,15,1Table2(continued)TemperatureTimeyearsExpectedstrengthofPE-RTTypeIMPaExpectedstrengthofPE-RTTypeIIMPa8014,34,654,24,5103,84,4183,44,39013,63,843,23,762,93,69513,23,442,63,36 DemonstratingconformanceTodem
38、onstrateconformancetotherequirementsofthisdocument(referencelines),theproceduregiveninAnneXAshallapply.7 DerivationofwallthicknessesInAnnexB,theprinciplesregardingthederivationofminimumwallthicknessesofpipingcomponentsrelativetotheapplicationclassesarespecified.AnnexA(normativeDemonstratingconforman
39、cetothereferencelinesThematerialinpipeformshallbeevaluatedinaccordancewithISO9080oranequivalentdocumentinwhichtheinternalpressuretestsaremadeinaccordancewithISO1167-1andISO1167-2般findthelplvalues(asdefinedinISO9080).Thevaluesthusdeterminedshallatleastbeashighasthecorrespondingvaluesofthereferencecur
40、ves.Testingshallbecarriedoutatthefollowingtemperatures: 20; 60to82; 95; 110.NOTE82isequivalentto180F,commonlyusedasatesttemperatureinASTMstandards.Alternatively,conformancewiththereferencelinesshallbedemonstratedbyplottingtheindividualexperimentalresultsoftheinternalpressuretestsonthegraph.Atleast97
41、5%oftheseexperimentalresultsshalllieonorabovethereferencelines.ConformanceofthematerialtotheextrapolationtimelimitsasgiveninTabIe1shallbedemonstratedinaccordancewithISO9080:2012,5.1.5and5.2.Foralltemperatures,thetimelimitsofthematerialshallbeatleastashighasthevaluesgiveninTable1.ForPE-RTtypeIImater
42、ials,theseexperimentalresultsshallnotgiveanybrittlefailuresindicatingthepresenceofakneeatanytemperatureupto110within8760h.AnnexB(informative)DerivationofScacmavvalues8.1 GeneralThisannexspecifiestheprinciplesregardingthederivationofthemaximumcalculatedpipevaluesS(ScalcmaxValUeS)and,hence,ofminimumwa
43、llthicknesses,emin,ofpipingcomponentsrelativetotheclassesofserviceconditions(applicationclass)asgiveninISO10508,andtheapplicabledesignpressure,PDaStypicallyusedforhotandcoldindoorpipingsystems.NOTEClasses1,2,4and5fromtheclassesofserviceconditionsinISO10508havebeenusedinthisannexforcalculations.8.2 S
44、erviceconditionsandoverallservice(design)coefficientsThedesignstress,aD,foraparticularclassofserviceconditions(applicationclass)iscalculatedusingFormUlae,2),f3)and(4),usingMinersruleinaccordancewithISO1376OE1,andtakingintoaccounttheapplicableclassrequirementsgiveninISO10508andTableB.l,andtheservicec
45、oefficientsgiveninTabIe百2TableB.lClassificationofserviceconditionsApplicationclassesDesigntemperatureTDTimeaatTDyearsTmaXTimeatT1maxyearsT1malTimeatr1malhTypicalfieldofapplicationla604980195100Hotwatersupply(60)2a704980195100Hotwatersupply(70)4b2040602,52025702,5100100Underfloorheatingandlowtemperatureradiators5b206080142510901100100HightemperatureradiatorsISO10508isnotapplicabletovaluesofTd,TmaXandTmaIinexcessofthosegiveninthistable,aAcountrymayselecteitherClass1or2inordertoconformtoitsnationalguidelines.bWheremorethanonedesigntemperatureappearsforanyclass,thetimessho
