Smart Pigging-a contribution to the monitoring of the anti-corrosion protection systems on pig-inspectable high-pressure gas transmission pipelines

摘要

High-pressure gas transmission pipelines installed underground are exposed to the risk of external corrosion. The application of a sheathing (passive protection) and, since the 1950s, the installation of a cathodic anit-corrosion protection system, provide pipelines with effective protection against this danger. In the past, the effec- tiveness of cathodic anti-corrosion protection systems was verified by means of in- tensive measuring and re-measuring cycles.