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- W2388141882 abstract "Because the integral strength of oil pipeline is greatly affected by the helix welding seams,it is necessary to study this influence thoroughly.In fact,the degradation of the integral strength of pipeline is affected by many factors,among which the strength degradation of pipeline welding materials by outer and internal loads,corrosive circumstances and so on are one of the most important.Because of stress concentration,micro-cracks will develop inner welding seams;the life of pipeline will then be reduced.Thus,it is necessary to study the mechanical properties of pipeline welding materials after long-term service.This study performed a series of tension and fatigue tests on 16Mn pipeline materials.The samples were taken from the Luning oil pipeline,which has been in service for about thirty years,and a brand new pipeline respectively.Half of the specimens were made with welding seams and the other half without welding seams.Results showed that the mechanical properties of 16Mn pipeline material were stable and no distinct strength degradation was detected.But the ability of welding seams to resist fatigue load was greatly reduced after long-term service." @default.
- W2388141882 created "2016-06-24" @default.
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- W2388141882 date "2008-01-01" @default.
- W2388141882 modified "2023-09-23" @default.
- W2388141882 title "Research on Mechanical Properties of Helix Welding Seams on Oil Pipelines" @default.
- W2388141882 hasPublicationYear "2008" @default.
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