Pipelines can be, and are, routinely inspected and monitored using many direct and indirect techniques. The methods are well-documented and aim to ensure that:
a. pipelines do not become defective or damaged ('proactive' methods),
b. damage or defects are detected before they cause serious problems ('reactive' methods). An operator should assess the greatest damage/defect risk to his/her pipeline, then select a monitoring/inspection method to reduce that risk:
TABLE : Pipeline Inspection and Monitoring Methods
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