NORSOK Cathodic protection Rev2 Sep97

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1、NORSOKSTANDARDCOMMONREQUIREMENTSCATHODICPROTECTIONM-503Rev.2,September1997PleasenotethatwhilsteveryefforthasbeenmadetoensuretheaccuracyoftheNORSOKstandardsneitherOLFnorTBLoranyoftheirmemberswillassumeliabilityforanyusethereof.M-503,Rev.2,September1997page1FOREWORDINTRODUCTION1SCOPE2NORMA

2、TIVEREFERENCES3DEFINITIONS4CATHODICPROTECTIONDESIGN4.1General4.2Electricalcontinuityrequirements4.3Mudzone4.4Protectionofconcretestructures5DESIGNPARAMETERS5.1Designlife5.2Currentdensityrequirements5.3Coatedsurfaces5.4Mudmats,skirtsandpiles5.5Currentdraintowells5.6Currentdraintoanchorcha

3、ins5.7Pipelines5.8Electrolyteresistivities5.9Sacrificialanodes6ANODEMANUFACTURING6.1Pre-productiontest6.2Coating6.3Insert-steelmaterials6.4Aluminiumanode/materials6.5Zincanode/materials7ANODEINSPECTION,TESTINGANDTOLERANCES7.1Steelinserts7.2Chemicalanalysis7.3Anodeweight7.4Anodedimensions

4、andstraightness7.5Insertdimensionsandposition7.6Anodesurfaceirregularities7.7Cracks7.8Internaldefects,destructivetesting7.9ElectrochemicalqualitycontroltestingM-503,Rev.2,September1997page2FOREWORDNORSOK(ThecompetitivestandingoftheNorwegianoffshoresector)istheindustryinitiativetoaddvalue

5、,reducecostandleadtimeandremoveunnecessaryactivitiesinoffshorefielddevelopmentsandoperations.TheNORSOKstandardsaredevelopedbytheNorwegianpetroleumindustryasapartoftheNORSOKinitiativeandarejointlyissuedbyOLF(TheNorwegianOilIndustryAssociation)andTBL(FederationofNorwegianEngineeringIndustr

6、ies).NORSOKstandardsareadministeredbyNTS(NorwegianTechnologyStandardsInstitution).Thepurposeofthisindustrystandardistoreplacetheindividualoilcompanyspecificationsforuseinexistingandfuturepetroleumindustrydevelopments,subjecttotheindividualcompany'sreviewandapplication.TheNORSOKstandardsm

7、akeextensivereferencestointernationalstandards.Whererelevant,thecontentsofthisstandardwillbeusedtoprovideinputtotheinternationalstandardisationprocess.Subjecttoimplementationintointernationalstandards,thisNORSOKstandardwillbewithdrawn.INTRODUCTIONRevision2ofthisstandardis