1.1 General remarks

    Offshorepipelinesareusedforoilandgastransportworld-wide.Dependingonapplication,pipelinescanbeclassifiedinto:(1)Exportpipelines,largediameterlinesforexportingprocessedoilandgasfromtheoffshoreinstallationtotheonshoreprocessingplantortothemarket;(2)Flowlines......查看详细>>

标签:海洋工程柔性立管与海底管道

1.2 The design process

    Fromtheaboveitisclearthatthepipelinedesignprocessisamulti-disciplinaryprocessthatrequiresavarietyofengineeringskillsandknowledgeincluding:(1)Thermodynamicsandreservoirtechnology;(2)Materialtechnology;(3)Cartography;(4)Geotechnics;(5)Coastalengineering;(6)......查看详细>>

标签:海洋工程柔性立管与海底管道

1.3.1 Steel pipelines

    Thesteelpipelineengineeringprocessisnormallydividedintothreephases:(1)Conceptualengineering;(2)Pre-engineering;(3)Detailengineering.Theprimaryobjectivesoftheconceptualengineeringphaseistoinvestigatetechnicalfeasibility,identifyconstraintsthatneedfurtherin......查看详细>>

标签:海洋工程柔性立管与海底管道

1.3.2 Flexible pipes

    Withreferenceto(API,2008a),designofflexiblepipesisalsocarriedoutinstages:(1)MaterialselectionconsideringthetemperatureandchemicalconditionsintermsofpH(sweetorsourservice);(2)Cross-sectionconfigurationdesignbasedonwhattobetransported(gas,oil,water)andatwhi......查看详细>>

标签:海洋工程柔性立管与海底管道

2.1 General remarks

    Inthefollowing,thedesignprinciplesappliedforpipelinesandnon-bondedflexiblepipesarediscussed.Thisincludesdefinitionofbasicconceptssuchas:(1)Characteristicloadconditionsandassociatedloadeffects;(2)Definitionoflimitstatesasbasisfordesignduringrelevantloadcon......查看详细>>

标签:海洋工程柔性立管与海底管道

2.2 Design formats

    Inrelevantstandardsforpipelinedesigntherearetwodifferentdesignprinciplesinuse:(1)LoadFactoredResistanceDesign(LRFD);(2)AllowableStressDesign(ASD).TheLRFDdesignprincipleisappliedinthepipelinestandardDNV-OS-F101(DNV,2012),whereasASDwasappliedinthepreviousDN......查看详细>>

标签:海洋工程柔性立管与海底管道

2.3 Discussion of relevant loads

    Servingasanexampletodiscussrelevantloadsforslenderstructureswithonesectionrestingontheseabedandanotherhangingintothesea,Figure2.5showsapipelinewhichisinstalledbytheS-laymethod.Thepipeisemptyandhasasubmergedweightperlengthofpipewswithanassociateddryweightp......查看详细>>

标签:海洋工程柔性立管与海底管道

2.4.1 Mechanical failure modes for steel pipelines

    Thepipelineincludingtherisersectionsmustbedesignedtoensurerobustandsafeoperationthroughoutitslifetime.Thisincludesavoidingflowfailurebywaxblocking(typicallyduetohydrocarbonscloggingtothepipewallinoilpipelines)orhydrateformation(typicallyforflowlineswithun......查看详细>>

标签:海洋工程柔性立管与海底管道

2.4.2 Mechanical failure modes for flexible pipes

    Flexiblepipesarenormallyusedforflexiblerisersorflowlines.Theflexiblepipeisacomplexstructurewhereeachlayerhavedifferentfailuremodes.Thecombineduseofsteelandthermoplasticsintroducesmaterialcompatibilityissues.Thisisespeciallythecaseforhightemperatureandpres......查看详细>>

标签:海洋工程柔性立管与海底管道

2.5 Cross-section design

    Aprimarydesignrequirementforsteelpipelinesandflexiblepipesisthattheymustcarrytheproducttobetransported,i.e.tosustaintheinternalpressure.Hence,theselectionofcross-sectiondesignintermsofwallthicknessanddimensionofarmourlayersisnormallygovernedbythestressint......查看详细>>

标签:海洋工程柔性立管与海底管道
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