简介：Inthisinvestigation,themechanicalpropertiesandlow-temperaturefracturetoughnessofAPI5LX65offshorepipelineweldedjointswerestudied.StructureIntegrityAssessmentProcedure(SINTAP)-FailureAssessmentDiagram(FAD)methodwasappliedtothepipestructurewithsurfaceflawattheweldtoe.AccordingtotheISOstandardBS7448,theCTODfracturetoughnessoftheweldedjointswasdeterminedatthetemperatureof0℃.Fortheheat-affectedzone(HAZ)specimens,post-testmetallographicanalysiswasperformedtoverifythatthetipofthecrackwaslocatedinthecoarsecrystalzoneinordertoconfirmthevalidityoftheaboveresults.Thefailurelinesofanalysislevel1and3ofweldmetalwerederivedfromtheresultsofthemechanicalpropertytest.Theassessmentwasperformed,consideringthemaximumlaystress,residualstressconservativelyassumedtobeuniformtensilestress,andminimumCTODvalue.Theresultsoftheassessmentshowedthatpipelinestructurewithasurfaceflaw(theheightandlengtharerespectively2.2mmand5mm)attheweldtoeissafe.ThisstudylaysthefoundationofapplicationofSINTAPtopipelinestructureassessment.
客服QQ：30444492琼网文【2021】1550-113号
增值电信业务经营许可证：琼B2-20210322
出版物经营许可证：新出发龙华出字第(2021)009号
广播电视节目制作经营许可证：(琼)字第00779号
版权所有 ©2002-2024 期刊网 琼ICP备2021005105号
