Section R. 29.7110 - Cathodic protection maintenanceRule 110. Sections 5-3 and 5-3.1 of the storage and handling of gaseous and Liquefied H2 code are added as follows:
5-3 Cathodic protection maintenance.
5-3.1
(a) Owners and operators shall ensure that all metallic container systems that are underground, mounded, or partially underground are protected and maintained to minimize corrosion as cited in the NACE standard RP0169 entitled "Recommended Practice, Control of External Corrosion of Underground or Submerged Metallic Piping Systems" and NACE recommended practice RP02 85 entitled "Corrosion Control of Underground Storage Tank Systems by Cathodic Protection," adopted by reference in section 8.(b) All corrosion protection systems shall be operated and maintained to continuously provide corrosion protection to the metal components of the portion of the ASME approved container system that routinely contains liquid H2 and that is in contact with the ground.(c) All container systems equipped with cathodic protection systems shall be inspected for proper operation by a NACE certified cathodic protection tester as defined in section 1-3. The H2 system shall be tested within 6 months of installation and at least once each calendar year at intervals not to exceed 15 months.(d) Container systems equipped with impressed current cathodic protection systems shall be inspected by the owner every 60 days to ensure that the equipment is operating within design specifications. The design limits shall be readily available.(e) If container systems are equipped with cathodic protection, then the owner or operator shall maintain records to demonstrate that the cathodic protection is in compliance with the performance standards of this section. The records shall provide both of the following:
(i) The results of the last 3 inspections required in subsection (d) of this section.(ii) The results of testing from the last 2 inspections required in subsection (c) of this section.(f) Within 6 months following the repair of any cathodically protected container system, where the repairs may affect the operation of the cathodic protection system, the system shall be tested in accordance with subsections (c) and (d) of this section to ensure that it is operating properly.(g) Repairs or replacement of a cathodic protection system shall be conducted by a NACE certified corrosion expert as defined in section 1-3. General system maintenance of the cathodic protection system including, but not limited to, replacement of fuses, and splicing of cable would not be required to be designed by a corrosion expert and shall be approved by the department to not increase the hazard to public health, safety, and welfare and the environment.Mich. Admin. Code R. 29.7110