Corrosion control

(a)Scope. This section establishes requirements for hazardous liquid public utilities protecting pipelines against corrosion.#

(b)Procedures. A hazardous liquid public utility shall have written procedures for the design, installation, operation and maintenance of cathodic protection systems. The procedures must be specific and written for each cathodic protection test, survey and inspection, and must be carried out by, or under the direction of, a person qualified in pipeline corrosion control methods.#

(c)Adequacy of cathodic protection. A hazardous liquid public utility shall test a cathodically protected pipeline at the corrosion test station to determine the adequacy of cathodic protection as follows:#

(1)Each pipeline must be tested at least once each calendar year, with intervals not exceeding 15 months. Each impressed current ground bed must be tested as part of this monitoring.#

(2)Each non-remote cathodic protection rectifier must be inspected once each calendar month with intervals not exceeding 37 days to ensure that it is operating properly. Remote monitoring devices are permissible to accomplish monitoring; however, if the remote device stops reporting or reports operations outside the expected parameters, then the remote device must be inspected within a reasonable time period not to exceed 7 days from date of discovery.#

(3)Each reverse current switch, each diode and each interference bond whose failure could jeopardize structure protection on a pipeline transporting HVLs must be electrically checked for proper performance 12 times each calendar year, with intervals not exceeding 37 days.#

(4)A hazardous liquid public utility shall initiate actions to start remedial measures within 30 days upon discovery to correct any deficiencies indicated by the monitoring. At no point shall the completion of the remedial measures exceed the next scheduled inspection.#

(5)If a hazardous liquid public utility cannot start the remedial measures within 30 days as provided in paragraph (4), the hazardous liquid public utility may request, in writing to the Pipeline Safety Section, and the Pipeline Safety Section may grant a 30-day extension for good cause shown. Additional 30-day extensions may be requested and granted for good cause shown thereafter.#

(d)Interference currents.#

(1)A hazardous liquid public utility shall have a written continuing program to minimize the detrimental effects of stray currents from foreign pipelines, railways, mining operations or other current sources such as stray current. The program must include provisions for adequately documenting actions and activities for mitigating interference currents.#

(2)Each impressed current system shall be designed and installed to minimize detrimental effects to foreign pipelines and other underground metallic structures.#