After a lead is repaired or replaced, what must be verified?

After a lead is repaired or replaced, it is essential to verify that the cathodic protection (CP) system is functioning properly. This step is critical because the primary purpose of a lead in this context is to connect the cathodic protection system to the pipeline. If the CP protection is not functioning, the pipeline can become susceptible to corrosion, negating the effectiveness of the repairs made.

Verifying the operation of the cathodic protection ensures that the newly repaired or replaced lead is adequately protecting the pipeline from corrosion. This typically involves measuring electrical potentials or current levels to confirm that the CP system is providing sufficient protection according to the established criteria.

While factors such as adequate backfill, the correct diameter of the replacement wire, or the technician's qualification may be important in other respects, the immediate concern after a lead repair or replacement is ensuring that the system is actively preventing corrosion through effective cathodic protection. Thus, confirming the proper functioning of the CP system is indispensable for the integrity and longevity of the pipeline.