Cathodic Protection Interference

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The Cathodic Protection – Interference Technical Community of Interest will cover cathodic protection interference issues from all sources of stray current including DC and AC stray current, HVAC colocation, shared ROW interference and other general sources that may cause interference on a structure under cathodic protection.

 Distance between Canister and unprotected structure

Fadi Abdulghani's profile image
Fadi Abdulghani posted 05-25-2024 02:12 AM

Hello,

hope you can assist me in the subject matter.

During our recent excavation for the installation of MMO canister anodes as part of the external protection for the tank bottom, we encountered some unprotected pipelines in close proximity to the tank. Is there any reference / recommendation on the minimum distance that should be maintained between the canister anodes and these unprotected structures.

thanks

Thomas Gibb's profile image
Thomas Gibb posted 07-22-2024 04:10 PM

While I don't recall that there is a recommended minimum distance, I know that such pipelines should be provided with test stations, tested for stray current pickup and discharge, and when discharge is found provided, with mitigation. The owner of the new cathodic protection system might be held liable for any stray current damage and primary and secondary consequences of product loss.