Cathodic Protection
For Offshore Pipelines
An introduction
Pipelines all over the world are reaching the end of their original anodes' designed life. Deepwater Corrosion Services specializes in cathodic protection anode replacement for offshore pipelines; we have a proven track record for dependable, affordable anode retrofit projects, using our own manufactured sacrificial anode systems. For aging pipelines, damaged pipelines or pipelines in need of supplemental cathodic protection, our field-proven anode connection system (RetroClamp) offers fast installation, extending the life of the pipeline at minimal cost.
For new pipelines, we provide stock anode bracelets, made at one of our two certified ISO 9000 anode foundries: Deepwater Gaus (Houston, TX) and Deepwater MPE (Indonesia). Having access to our own raw materials for all of the aluminum and zinc anodes in our systems allows us to ensure the highest quality alloys on the market.
For most retrofit situations, we usually recommend the RetroSled system, due to its continued track record of success in the Gulf of Mexico. In certain instances, such as an unstable seabed conditions or at a pipeline crossing, we recommend the CP Mat, for its added stability.
At the same time that the new anodes are installed on the pipeline, we recommend also that our customers opt for a retrofit cathodic protection monitoring system. This helps to more easily verify continuity at installation and also to monitor system performance for the life of the new cathodic protection system.
Related Technical Information
Extending the Life of Offshore Pipeline Cathodic Protection
Abstract: This paper discusses the practicalities of installing replacement cathodic protection to ageing offshore pipelines using diver assisted and diver-less systems.
Improvements in Offshore Pipeline Cathodic Protection
Abstract: New deep water discoveries combined with current high energy prices have given much of the world's aging offshore infrastructure a new lease on life ...
External Corrosion Control & Inspection of Deep Water Pipelines
Abstract: Pipe coatings with galvanic anode bracelets has worked equally as well in deep water as it has in shallow. There are however some very important differences in the way corrosion control ...
Corrosion Protection for High-Temperature Subsea Pipelines
A subsea pipeline and associated components have been protected from corrosion with a combination of a high temperature pipeline fusion bonded epoxy coating, a thermal spray aluminum coating ...
Pipeline Cathodic Protection Products
Bracelet Anodes
For new pipelines, Deepwater provides aluminum anode bracelets, manufactured at one of our two foundry facilities, both of which are less than 4 years old. Having a foundry in each hemisphere allows for competitive pricing and lead times for any project.
RetroSled™
The Retrosled is our standard aluminum anode sled, used in combination with the RetroClamp on most pipelines in need of anode replacement or supplementation. The sleds can be deployed by divers or ROV's. The average cathodic protection life extension for a retrofit of this kind is 25 years.
RetroClamp™
The RetroClamp allows us to retrofit the cathodic protection anodes on a pipeline without divers, and without removing the pipeline weight coating. It is a standard, off-the-shelf item, sized for any standard diameter tubular, fully diver or ROV friendly. Only partial excavation (120°) is necessary for buried pipe.
CP Mat™
The CP Mat is a combination concrete stabilization mattress and cathodic protection system in one. By casting abodes directly into the concrete segments, a standard mattress can now provide cathodic protection for pipeline crossings, pipelines in harsh bottom conditions, and many other applications.