Oil and Gas Industries
The energy distribution of the world is very much depending on the integrity of steel pipes buried underground. Oil and gas pipelines form an large part of our life-supporting infrastructure. When a steel pipe is buried in soil, it is always in contact with ground water and tends to corrode despite of heavy coatings applied. Soil movement and installation mishaps will create coating defects which can result is disastrous leaks. Cathodic protection can effectively prevent the coating defect sites from corrosion and therefore many countries have defined pipeline CP obligatory.
Cathodic protection of underground pipelines is probably the most common form of CP in the world. Savcor offers protection for underground pipelines and storage tanks, tank bottoms and wharf structures in marine terminals.
We are specialized in protecting complex underground structure network found in tank farms and pumping stations. Our strength relies on sophisticated control system that can compensate for the interference of multiple protection circuits working in close proximity.
In oil refineries, cooling water lines and heat exchangers benefit from CP when sea water is used as a coolant.
Managing the corrosion control of marine oil terminal
Perfect example of the complex subsoil CP system is the Novorossiysk Marine terminal in Russia, operated by Caspian Pipeline Consortium (CPC).
Savcor started the work with a comprehensive corrosion survey when the terminal was five years in operation. The survey revealed the need for better control of the 32 separate cathodic protection circuits that interfered with each other. We added our automatic, remotely monitored control system first, then started upgrading the rectifiers based on a life cycle plan.
In 2012, CPC started a $5.4 billion expansion project to double the volume of crude oil it ships out. Savcor signed the contract for design and supply of the CP system for the expansion, consisting of six large 100 000 m3 reservoir tanks and the related subsoil piping. The bottoms of all reservoir tanks are protected.
Due to the large area covered by the terminal, data transfer between different CP substations is handled by radio modems which brought savings in eliminating a lot of data cabling. The project expanded the CP system with eleven new protection circuits.
As a sign of good cooperation and mutual truct, CPC has granted Savcor also the contract for annual maintenance and service of all the CP systems installed at the Marine terminal.