BS EN 13941-2003 design and installation of preins

BRITISHSTANDARDBSEN13941:2003IncorporatingcorrigendumMarch2008DesignandinstallationofpreinsulatedbondedpipesystemsfordistrictheatingICS91.140.10  Licensedcopy:TheUniversityofHongKong,TheUniversityofHongKong,Versioncorrectasof12/03/200900:03,(c)BSIBSEN13941:2003ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon2April2003©BSI2008ISBN9780580613272NationalforewordThisBritishStandardistheUKimplementationofEN13941:2003.ItpartiallysupersedesBS7572:1992.TheUKparticipationinitspreparationwasentrustedbyTechnicalCommitteeRHE/9,Thermalinsulatingmaterials,toSubcommitteeRHE/9/3,Insulationofundergroundpipelines.Alistoforganizationsrepresentedonthissubcommitteecanbeobtainedonrequesttoitssecretary.Thispublicationdoesnotpurporttoincludeallthenecessaryprovisionsofacontract.Usersareresponsibleforitscorrectapplication.CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.Amendments/corrigendaissuedsincepublicationDateComments31March2008CorrectiontotitleonfrontcoverLicensedcopy:TheUniversityofHongKong,TheUniversityofHongKong,Versioncorrectasof12/03/200900:03,(c)BSIEUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMEN13941March2003ICS91.140.10EnglishversionDesignandinstallationofpreinsulatedbondedpipesystemsfordistrictheatingConceptionetinstallationdessystèmesbloquésdetuyauxpré-isoléspourlesréseauxenterrésd'eauchaudeBerechnungundVerlegungvonwerkmäßiggedämmtenVerbundmantelrohrenfürdieFernwärmeThisEuropeanStandardwasapprovedbyCENon27December2002.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITÉEUROPÉENDENORMALISATIONEUROPÄISCHESKOMITEEFÜRNORMUNGManagementCentre:ruedeStassart,36B-1050Brussels©2003CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN13941:2003ELicensedcopy:TheUniversityofHongKong,TheUniversityofHongKong,Versioncorrectasof12/03/200900:03,(c)BSI2ContentspageForeword.....................................................................................................................................................................6Introduction.................................................................................................................................................................71Scope......................................................................................................................................................................92Normativereferences...........................................................................................................................................93Unitsandsymbols..............................................................................................................................................123.1Units................................................................................................................................................................123.2Symbol............................................................................................................................................................124Termsanddefinitions.........................................................................................................................................135Generalconsiderationsforsystemdesign......................................................................................................175.1Generalrequirements.....................................................................................................................................175.2Servicelife......................................................................................................................................................185.3Preliminaryinvestigations...............................................................................................................................185.4Determinationofprojectclass........................................................................................................................185.4.1Riskassessment......................................................................................................................................185.4.2Projectclasses..........