BS EN 14620-4 2025.docx

BSEN14620-4:2025BSIStandardsPublicationDesignandmanufactureofsitebuilt,vertical,cylindrical,flat-bottomedtanksystemsforthestorageofrefrigerated,liquefiedgaseswithOPeratingtemperaturesbetween00Cand-196°CPart4:Insulationcomponentsbsi.NationalforewordThisBritishStandardistheUKimplementationofEN14620-4:2025.ItsupersedesBSEN14620-4:2006,whichiswithdrawn.TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitteePVE/15,StorageTanksforthePetroleumIndustry.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbemade,andnoresponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.Therecipientisadvisedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.©TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited2025ISBN9780539214574ICS23.020.10CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30April2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedEUROPEANSTANDARDNORMEEUROPEENNEApril2025EuropaischenormICS23.020.10SupersedesEN14620-4:2006EnglishVersionDesignandmanufactureofsitebuilt,vertical,cylindrical,flat-bottomedtanksystemsforthestorageofrefrigerated,liquefiedgaseswithoperatingtemperaturesbetween0and-196-Part4:InsulationcomponentsConceptionetfabricationdereservoirsafondplat,AuslegungundHerstellungStandortgefertigterjverticaux,Cylindriques,construitssursite,destinesauStehender,ZylindrischerFlachboden-Tanksystemenfiirstockagedesgazrefrigeres,liquefies,dontlesdieLagerungvontiefkaltVerfliissigtenGasenbeitemperaturesdeservicesontcomprisesentre0etBetriebstemperaturenzwischen0und-196-Teil196-Partie4:Constituantsisolants4:DammungThisEuropeanStandardwasapprovedbyCENon27January2025.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040BrusselsRef.No.EN14620-4:2025E©2025CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.PageContentsEuropeanforeword41Scope52Normativereferences53Termsanddefinitions.74Designrequirements,performancecharacteristics,testingandselectionofinsulatingmaterials71.1 General71.2 Analysisofdesignrequirements81.2.1 General81.2.2 Thermalresistance81.2.3 Structuralandtightnessrequirements81.2.4 Ageinganddeterioration91.2.5 Specificdesignrequirements91.3 Assessmentoftheperformancecharacteristics.91.3.1 General91.3.2 Thermalresistance91.3.3 Mechanicalproperties91.3.4 Temperatureresistance101.3.5 Resistancetowaterandwatervapour101.3.6 Influencesofstoredproduct101.3.7 Chemicalproperties.101.3.8 Firebehaviour111.4 Testingofmaterialsandsystems121.4.1 General121.4.2 Testmethods125 Protectionofinsulation-vapourbarrier135.1 General135.2 Protectivestructureformedbytheoutertank135.3 Protectivecoverforexternalinsulation136 Designofinsulationsystem.146.1 General146.2 Thermaldesign146.3 Structuraldesign156.3.1 General156.3.2 Loadbearinginsulation/compressiveaction156.3.3 Otherloadbearinginsulationmaterials176.3.4 Loadbearinginsulation/otheractions176.4 Insulationforeachtankcomponent176.4.1 General176.4.2 Supportingringbeam186.4.3 Bottominsulation186.4.4 Shellinsulation(external)196.4.5 Shell/wallinsulation(internal)206.4.6 Roofinsulation(external)226.4.7 Roofinsulationon