In-line Inspection and Corrosion Analysis for Submarine Pipeline from Weizhou11-1 to 12-1PAP

Submarine pipeline from Weizhou 11-1 to 12-1PAP platform was seriously corroded,To ensure safe & reliable operation and to know the metal loss of wall and weld,crack development and location and degree of deformation of the pipeline structure itself,based on the survey of the repair and maintenance history data,referring to the standards and norms related to the pipeline integrity management both at home and abroad,this paper thoroughly elaborates the in-line inspection job preparation,geometry and metal loss detection process implementation and result analysis.Especially,the depth of the serious metal loss defects,location distribution and mechanism are analyzed,and the subsequent corrosion protection and safety measures and suggestions for the development of multifunctional detector are put forward.