Safe electrical isolation of cathodically protected pipe

摘要

The design and installation of AC protection equipment for pipe lines paralleling power lines can range from a simple, straight-forward solution to an extremely complex one. Usually, with the proper care and expertise applied to consider all predictable operating characteristics, a safe and cost-effective solution can be. developed utilizing protective equipment. Occasionally, for special situations, other protective devices may need to be considered. A coordinated design of the cathodic isolation system greatly reduces the CP cost. Also, by deleting the density of AC ionically passing through the soil/metal interface, a much more uniform and/or optimal polarized potential of the pipe line structure is obtained.