RECOMMENDEDPRACTICEDETNORSKEVERITASDNV-RP-F107RISKASSESSMENTOFPIPELINEPROTECTIONOCTOBER2010Theelectronicpdfversionofthisdocumentfoundthrough©DetNorskeVeritasAnycommentsmaybesentbye-mailtorules@dnv.comForsubscriptionordersorinformationaboutsubscriptionterms,pleaseusedistribution@dnv.comComputerTypesetting(AdobeFrameMaker)byDetNorskeVeritasIfanypersonsufferslossordamagewhichisprovedtohavebeencausedbyanynegligentactoromissionofDetNorskeVeritas,thenDetNorskeVeritasshallpaycompensationtosuchpersonforhisproveddirectlossordamage.However,thecompensationshallnotexceedanamountequaltotentimesthefeechargedfortheserviceinquestion,providedthatthemaximumcompen-sationshallneverexceedUSD2million.InthisprovisionDetNorskeVeritasshallmeantheFoundationDetNorskeVeritasaswellasallitssubsidiaries,directors,officers,employees,agentsandanyotheractingonbehalfofDetNorskeVeritas.FOREWORDDETNORSKEVERITAS(DNV)isanautonomousandindependentfoundationwiththeobjectivesofsafeguardinglife,propertyandtheenvironment,atseaandonshore.DNVundertakesclassification,certification,andotherverificationandconsultancyservicesrelatingtoqualityofships,offshoreunitsandinstallations,andonshoreindustriesworldwide,andcarriesoutresearchinrelationtothesefunctions.DNVservicedocumentsconsistofamongstotherthefollowingtypesofdocuments:—ServiceSpecifications.Procedualrequirements.—Standards.Technicalrequirements.—RecommendedPractices.Guidance.TheStandardsandRecommendedPracticesareofferedwithinthefollowingareas:A)Qualification,QualityandSafetyMethodologyB)MaterialsTechnologyC)StructuresD)SystemsE)SpecialFacilitiesF)PipelinesandRisersG)AssetOperationH)MarineOperationsJ)CleanerEnergyO)SubseaSystemsDETNORSKEVERITASRecommendedPracticeDNV-RP-F107,October2010Changes–Page3ACKNOWLEDGEMENTSThisRecommendedPracticeisbaseduponaprojectguidelinedevelopedbyDNVforStatoil.DNVwouldliketotakethisopportunitytothankStatoilfortheirfinancialandtechnicalcontributions.DNVisfurthergratefulforvaluableco-operationanddiscussionwiththeindividualpersonnelinStatoilparticipatingintheproject.ThisRecommendedPracticehasbeendistributedforbothinternalandexternalhearing.DNVwouldliketothankallcompaniesgivingvaluablefeed-backandcommentstothisdocument.CHANGES•GeneralAsofOctober2010allDNVservicedocumentsareprimarilypublishedelectronically.Inordertoensureapracticaltransitionfromthe“print”schemetothe“electronic”scheme,alldocumentshavingincorporatedamendmentsandcorrectionsmorerecentthanthedateofthelatestprintedissue,havebeengiventhedateOctober2010.AnoverviewofDNVservicedocuments,theirupdatestatusandhistorical“amendmentsandcorrections”maybefoundthrough•MainchangesSincethepreviousedition(March2001),thisdocumenthasbeenamended,mostrecentlyinOctober2002.Allchangeshavebeenincorporatedandanewdate(October2010)hasbeengivenasexplainedunder“General”.RecommendedPracticeDNV-RP-F107,October2010Page4CONTENTS1General......................................................................51.1Introduction............................................................51.2Objectives..............................................................51.3ScopeandApplication...........................................51.4Generalconsiderations...........................................51.5Limitations.............................................................51.6Definitions..............................................................62Methodology.............................................................72.1Introduction............................................................72.2Safetyobjectives....................................................72.3Acceptancecriteria.................................................72.4Systemdescription.................................................72.5Hazardidentification..............................................82.6RiskAssessment....................................................82.7Riskreducingmeasures.........................................93Activitydescription................................................113.1Platform/Rig.........................................................113.2Subseaoperations.................................................113.3Fishing.................................................................113.4Ship......................................................................124Pipelineandprotectioncapacity...........................134.1General.................................................................134.2Damageclassification..........................................134.3Steelpipeline........................................................144.4Flexiblepipeline...................................................154.5Umbilical..............................................................164.6Differentprotectionmethods...............................165Failurefrequency...................................................195.1Introduction............................................