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DCVG- and CIP-Surveys

A CP-system is a secondary protection device meant for prolonging the operational life of a pipeline. The coating is always the primary system. At the spot where the coating has been damaged by exposure to an electrolyte (in this case the soil), the cathodic protection will in most cases prevent the pipeline from corroding.

So at those particular places where the coating is so worn that the pipeline makes contact with the soil, the primary protection system has failed and the CP will take over. Of course this situation is not desirable; the primary system should stay intact. However, below-ground monitoring is a complicated task.

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