The Hangzhou Bay Bridge in China was the longest ocean crossing bridge in the world at the time of its construction, spanning 36 kilometers across the Hangzhou Bay on the East China Sea. The bridge is located in a severe marine environment and durability was the major concern to achieve the required 100 years design life. Savcor designed and installed a Cathodic Prevention System during the construction period in 2006 and 2007 to provide long-term corrosion-free life for its main pylons.
Savcor was selected by the Roads and Traffic Authority of New South Wales, Australia to develop a Corrosion Prevention system which would guarantee a 100 year corrosion-free life for the legendarily beautiful Lawrence Hardgrave Drive Sea Cliff Bridge. The extensive Savcor CP system covers the pile caps and tall columns supporting the bridge deck.
Statoil had a major rehabilitation done on wharves 2 and 3 of the Kårstö processing plant which is the largest export port of natural gas liquids in Europe. The rehabilitation work included the installation of the Savcor Cathodic Protection System on the under-deck, total of 5250 sqm concrete area. Safety played a major role in Savcor’s System design as well as during the installation work. All the wharves are in the hazardous explosive area. Savcor’s in-house software added on important safety features and allowed Savcor to fulfill all the safety requirements to the CP system delivered.
Totally 4500 sqm of reinforced concrete beams and deck are cathodically protected by Savcor on a popular tourist cruise harbor Søndre Akerhuskai, Oslo. Work started in 2015 and the system was commissioned in September 2016. The normal operation of the wharf was not interrupted or disturbed during the rehabilitation work.
Sundsvallsbro in Sundsvall was opened for traffic in 2014. Already in 2015 it was noticed that the unpainted sheetpile foundations of the bridge supports were corroding much faster than expected. Corrosion was biofilm-induced, resulting from the local brackish sea water conditions. The specifications for the Cathodic Protection system are extremely strict on limiting the chloride gas evolution on the anode surface to make the system perfectly safe for nature.
The Savcor Cathodic Protection System was installed in 2018.
Reinforced concrete in Vassås Bridge suffered of heavy chloride induced corrosion on reinforcement steel. The bridge was equipped with an automatic Savcor CP system which was installed and commissioned during 2005-2006. The system has been running excellently since the installation.
DP World operates the container Terminal 3 in the huge Kwai Chung wharf. The T3 had been commissioned already in 1972 and the rehabilitation of the wharf was unavoidable. During the works, Savcor delivered a Cathodic Protection system for the under-deck soffit and for the beams of the whole 305 meters length of the quay. The CP system consists of 75 individual circuits and was the first project to utilize Savcor MCONex rectifiers. The CP system was commissioned in 2011.
There are three nuclear reactors in TVO Olkiluoto; OL1 and OL2 were built in late 70’s and OL3 will soon be commissioned. Savcor has supplied the CP’s for all of the underground cooling water channels. In OL3 a Cathodic Prevention System was installed during the construction with Savcor’s surface-mounted anodes. Savcor has met the stringent quality and safety requirements of the nuclear power industry and successfully serviced TVO already for over 20 years. Savcor has also delivered CP Systems to nuclear power plants in Sweden and in China.
Perfect example of the complex subsoil CP system is the Novorossiysk Marine terminal in Russia, operated by Caspian Pipeline Consortium (CPC), a joint venture, owned by Russian Transneft and Rosneft, Kazakstan Government and the US
companies Chevron and Exxon-Mobil.
Savcor started the work with a comprehensive corrosion survey when the terminal had been in operation for five years. The survey revealed the need for a better control of the 32 separate cathodic protection circuits that interfered with each other. First, Savcor added its automatic, remotely monitored control system, 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 from Novorossiysk. Savcor signed the contract for design and supply of the Savcor 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. Later, the client expanded the CP system
with eleven new protection circuits delivered by Savcor.
As a sign of good cooperation and mutual trust in 2017, CPC has granted Savcor the contract for annual maintenance and service of all the CP systems installed at the Marine terminal.
Yamal LNG produces and exports liquefied natural gas in very extreme arctic
conditions at the North-East of Yamal peninsula, Russia. The production plant, opened in 2018, has two loading berths which are kept open year-round for the combined icebreaker/tankers transporting the LNG to clients through ice
up to 2.5 meters thick.
The loading berths are constructed of steel sheet piles which require cathodic protection. The seasonal change in the sea water conductivity creates further challenges. The Savcor CP had to be designed based on very low conductivity during summer when fresh water from the river Ob dilutes sea water. Almost 3000 Amperes of current capacity and 24 individual protection circuits ensure corrosion-free status of the sheet piling.
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