OFFSHORE CATHODIC PROTECTION

Managing and maintaining the sustainability and the integrity of the offshore Oil & Energy infrastructures that are exposed to harsh environments like seawater, production fluids, bacteria, and high temperature, is the core business of our corrosion and cathodic protection team. Our engineering team strives to bring the optimal solutions to client's existing facilities as well as for new field development.

Jacket, offshore field

      Cathodic Protection Design

CP Descriptions

Cathodic Protection (CP) has been a widely used method for many years to prevent the offshore corrosion and often in association with coating or painting system. Based on the cathodic polarization of the metallic surfaces, CP aims to reduce the oxidation reactions (corrosion) on the protected material surfaces through the sacrificial or impressed current anode systems.  The sacrificial and impressed current anodes have showed excellent efficiency and performance in increasing offshore structures life expectancy when correctly designed.  The ENGCORR corrosion team has extensive experience in designing both sacrificial and impressed current CP systems for a wide range of offshore infrastructures. Our designs are performed with respect to clients' standards, international codes, industry regulations and as well as our many years of experience.  All CP system equipment is carefully selected considering the field operation specifications for optimal performance over the lifetime. We provide CP engineering consultancy at all stages of the project life cycle starting from Front End Engineering Design (FEED) to the execution phase covering:

  • Pre-Design feasibility study.

  • Conceptual detailed Design.

  • Engineering hardware system.

  • Designed system analysis.

  • General Arrangement / Layout Drawings.

  • Reports.

      Installation and Commissioning

Our corrosion team has the oilfield experienced, are qualified and certified personnel to supervise the installation of both Sacrificial and Impressed Current Cathodic Protection (SACP & ICCP) systems on offshore infrastructures. Our team has the expertise to inspect and troubleshooting ICCP systems, including transformer rectifiers, electrical cables, and all other components to ensure the installation is performed correctly. Our personnel have the adequate safety training and procedure to safely lead and operate the installation and commissioning of CP system equipment.

Inspection

      Potential Attenuation Modeling

Computational modeling of the typical distribution of potential along a pipeline cathodically polarized with one or multiple anodes equally spaced is one of our team specialties. The potential attenuation can be evaluated using different approaches such as those on the industry codes like ISO 15589-2 and DNV-RP-F103. The ISO procedure gives an indication of the current and potential distribution from the drain point. Whereas the DNV approach determine the maximum throwing power distance between two consecutive drain anodes  to keep the pipe cathodically protected.

However, Boundary Element Modeling and mathematical equation computations can also be used to evaluate the potential distribution along the pipeline. ENGCORR has the capability to provide a modeling assessment engineering for various configurations of pipelines.

Pipeline Attenuation Potential
Pipeline Attenuation Potential 5.JPG

If you require more  information, contact us today to see what we can do for you.