API-PUBL-937

~~~~~~~APIPUBL*9379bm0732290O559026596mEvaluationofDesignCriteriaforStorageTanksWithFrangibleRoofJointsAPIPUBLICATION937APRIL1996AmericanPetroleumInstitute1220LStreet,NorthwestWashington,D.C.20005COPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServicesCOPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServices~~APIPUBLU93796W07322900559027422WSPECIALNOTES(1)APIpublicationsnecessarilyaddressproblemsofageneralnature.Withrespecttoparticularcircumstances,local,state,andfederallawsandregulationsshouldbereviewed.(2)APIisnotundertakingtomeetthedutiesofemployers,manufacturers,orsupplierstowarnandproperlytrainandequiptheiremployees,andothersexposed,concerninghealthandsafetyrisksandprecautions,norundertakingtheirobligationsunderlocal,state,orfederallaws.(3)Informationconcerningsafetyandhealthrisksandproperprecautionswithrespecttoparticularmaterialsandconditionsshouldbeobtainedfromtheemployer,themanufacturerorsupplierofthatmaterial,orthematerialsafetydatasheet.(4)NothingcontainedinanyAPIpublicationistobeconstruedasgrantinganyright,byimplicationorotherwise,forthemanufacture,sale,oruseofanymethod,apparatus,orproductcoveredbyletterspatent.Neithershouldanythingcontainedinthepublicationbeconstruedasinsuringanyoneagainstliabilityforinfringementofletterspatent.(5)Generally,APIstandardsarereviewedandrevised,drmed,orwithdrawnatleasteveryfiveyears.Sometimesaone-timeextensionofuptotwoyearswillbeaddedtothisreviewcycle.ThispublicationwillnolongerbeineffectfiveyearsafteritspublicationdateasanoperativeAPIstandardor,whereanextensionhasbeengranted,uponrepublication.StatusofthepublicationcanbeascertainedfromtheAPIAuthoringDepartment[telephone[phone]].AcatalogofAPIpublicationsandmaterialsispublishedannuallyandupdatedquarterlybyAPI,1220LStreet,N.W.,Washington,D.C.20005.Copyright81996WeldingResearchCouncilInc.AmericanPetroleumInstituteCOPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServicesCOPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServices~APIPUBLX93796m073229005590283b9mEVALUATIONOFDESIGNCRITERIAFORSTORAGETANKSWITHFRANGIBLEROOFJOINTSDanielSwenson,Co-InvestigatorDonFenton,Co-InvestigatorZhiLu,GraduateResearchAssistantAsifGhori,GraduateResearchAssistantJoeBaalman,GraduateResearchAssistantMechanicalEngineeringDepartmentKansasStateUniversityManhattan,KS66506APIPUBLICATION937-APRIL1996AmericanPetroleumInstitute1220LStreet,NorthwestWashington,D.C.20005IT)ACOPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServicesCOPYRIGHTAmericanPetroleumInstituteLicensedbyInformationHandlingServices~APIPUBL893796m073229005590292T5mFOREWORDAmericanPetroleumInstitute(API)providesstandardsforthedesign,constructionandinspectionofstoragetanks.Oneofthefamilyofdesignstandards,API650-WeldedSteelTanksforOilStorage-isthetargetoftheresearchaddressedbythisBulletin.API650includes,amongotherimportantdesignprovisions,criteriagoverningthedesignoffrangibleroofjointsforweldedsteel,above-ground,cylindrical,storagetanks.Thefrangiblejointistheprimarydesignfeaturewhichassuresthefunctionalintegrityofthecylindricalshellandbottomjointtocontaintheliquidintheeventofanunexpectedover-pressurizationofatank.Becauseoftheimportanceofthefrangiblejointdesignfeaturefromasafetyandenvironmentalimplication,APIdecidedadditionalresearchwaswarranted.InMay1989,GuidoKarcher,actinginbehalfofAPI,definedspecificareaswhereresearchisneededtoevaluatethefrangibleroofjointprovisionsofAPI650standardandinitiatedarequesttoPVRCDesignDivisiontoaddresstheseresearchneeds.TherequestwasassignedtotheCommitteeonDynamicAnalysisandTestingforadministrativeandtechnicaldirection.ThemaingoalsoftheCommitteeincludedinitiatingtheresearchprogram,monitoringtheprogress,assuringtheresultsareresponsivetotheAPIrequestandmakingsurethattheresultsareclearlyandconciselydocumented.LiaisonwiththeCommitteeonShellsandLigamentswasmaintainedthroughouttheresearchactivities.TheCommitteeonDynamicAnalysisandTestingsolicitedproposalsfromqualifiedorganiza-tionstoaddresstheneedsdefinedinGuidoKarcher’sMay1989letter.ThesolicitationresultedinfourproposalswhichwerethoroughlyandobjectivelyevaluatedbytheCommittee.TheproposalbyKansasStateUniversity,ProfessorsDanielSwensonandDonFenton,wasselectedasthemostresponsivetothedefinedneeds.APVRCgrant(91-02)wasissuedinOctober1990forthefirstphaseofthethree-phaseresearchprogram.ThankstoDr.MartinPragerforhistechnicalandadministrativeskillsandthededicationandaggressivenatureoftheresearchteamatKansasStateUniversityunderthedirectionofProfessorSwenson,thecomprehensivethree-phaseresearchprogram,includingafinalreportoftheanalyticalandexperimentalevaluations,aninteractiveWindowsbasedPCprogramfortheanalysisofstoragetankswithfrangibleroofjointsandusermanualforthePCprogramwascompletedonscheduleinApril1996-durationofapproximately3%yearsfromthetimethegrantwasissued.Thethoroughnessandqualityoftheproductsarecommendable.TheresearchteamatKansasStateUniversitywhichconsistedof:0Co-investigatorsProfessorsDanielSwensonandDonFentonOgraduateresearchassistant