Cathodic Protection Systems

Cathodic Protection For Buried and Submerged Pipelines

PETUNIA supply the highest quality Cathodic Protection for buried and submerged pipelines as an effective secondary defense after factory and field applied coatings.

Planning lasting pipeline protection
Coating damage happens either during construction, movement or just through coating detonation, leaving exposed areas that can only be protected by CP.
So our CP systems consider:

Coating system applied
Age of pipeline and coating system
Soil type and corrosivity
Rural or urban areas
Pipeline routing
In-line valves or take-offs
Power availability

Cathodic protection for In Plant Piping

In Plant Piping
We supply Cathodic Protection to protect carbon steel and stainless steel buried in plant piping from corrosion and as a powerful secondary defense to factory and field applied coatings.

Planning the Ideal In Plant Piping CP System
Damage to pipelines coatings occur during movement, installation or simply general coating deterioration leaving exposed areas that can only be protected by CP As in plant piping can vary from short sections of pipe to long runs of complex piping, and whether in small stations or large production facilities, we offer site surveys and detailed design to make sure you have the optimum CP system for your needs.

Our CP systems take into consideration:

Isolation
Coating system applied
Age of pipeline/coating system
Soil type and corrosivity
Plant congestion
Pipeline routing
In-line valves or take-offs
Power availability

Types of systems available: Impressed: Close anode systems

It maximises the anode's effect regardless of isolation
You can choose multi-anodes or linear anodes
You can mix and match depending on piping layouts

Cathodic Protection for above ground storage tanks Undertank base/external and internal tank protection

PETUNIA can supply corrosion protection for any tank designed to operator and international specifications and standards, whether new build or existing retrofit. We cater our solutions towards tank dimensions, product, coating type and quality, and operating temperature.

Undertank CP Systems
Longer lasting Impressed ICCP systems Impressed current CP ICCP systems are more reliable, effective and flexible than sacrificial odes for undertank base protection.

A typical CP Undertank system
The materials required for a typical new undertank ICCP system will include:

A standard transformer rectifier
MMO titanium anode material
Permanent reference electrodes for monitoring
An undertank tube for ventilation, watering and/or portable measuring

Under normal circumstances with given information scope, PETUNIA's recommended system is an MMO titanium, mesh arrangement with a standard variac controlled TR and permanent Copper Copper Sulphate reference electrodes for potential monitoring. Ventilation / portable monitoring / watering pipe is also recommended.

Internal Tank CP Systems

A Typical Impressed CP Internal System A typical internal tank protection package would incorporate a transformer rectifier, MMO titanium anode material and silver/silver chloride reference electrodes.

Sacrificial Systems

We supply aluminum, magnesium and zinc anodes to be distributed uniformly around the tank floor and tank sides. Hydrocarbon products storage tanks sometimes contain residue of water, frequently saline in nature, that falls out and collects at the base of the storage tank. To prevent corrosion sacrificial anodes should be installed along the tank floor.

Special Cases

Storage tanks can hold products that are very acidic or alkaline in nature. Due to these variations each system is designed on a case-by-case basis.

Temporary Protection

Small magnesium anodes or zinc anodes. These can be circular or 'd' shaped ingots or ribbon anodes to suit the construction choice. Ingots are easier to install at test point locations however ribbon are better suited for desert locations (life 2-5 years).

Other Available Systems

One of our Cathodic Protection systems can protect well clusters and multi CP systems can protect complex sites and another one is concrete protection. Each requires detailed design and forethought.