SC Pipelines Practice Questions - South Carolina Pipelines Contractor Examination Exam

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Where a coated, cathodically protected steel gas pipeline passes through a metallic casing under a road, what is the required electrical condition?

The carrier must be bonded solidly to the casing at both ends The carrier must be isolated from the casing so the casing does not shield cathodic protection The casing must be used as the sacrificial anode Isolation is required only in Location Class 4

Correct Answer:

The carrier must be isolated from the casing so the casing does not shield cathodic protection

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