Gamma Ray System Operated by Divers for Underwater Inspection
Three pipelines from Campos Basin were inspected through MFL pigs, which registered the occurrence of atypical signal in the lower generatrix of the girth welds of these pipelines. The occurrence became critical due to the great number of welded joints with such indications. Because of the necessity to characterize the problem, some spots from each pipeline were inspected through underwater Computed Radiography using a tool handled by divers. This work was considered relevant and pioneer, as there is no record of similar activity in Brazil or overseas. The results obtained showed that the indications refer to damages by localized internal corrosion, showing mass loss between 10% and 28% of the thickness. This observation was the same for the three pipelines.
Underwater pipeline inspection Computed Radiography Corrosion Monitoring
Carla Alves Marinho Claudio Camerini Ricardo Lopes Davi de Oliveira
Petrobras Research Center Leopoldo A. Miguez de Melo - CENPES - PETROBRAS Av Horácio Macedo, 950, Cidade Universitária 21941-915 Rio de Janeiro, RJ, Brazil
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
55-62
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）