Table 8: Maintenance strategy for pipeline failures.

Failure mechanismAttributesMaintenance strategy

External interferenceSabotagePatrolling
Mechanical damagePipeline marking/improved right of Way
CorrosionExternal corrosionPipe coating
Internal corrosionIntelligent pigging survey
Structural defectsConstruction defectReconstruction/replacement
Materials defectsReplacement of pipelines
Operational errorEquipment failureReplacement of faulty equipment
Human errorOperator training