Offshore Application
SVM manufactures Aluminium anodes to virtually any size or configuration which may be required by an offshore structure or pipeline, which are tailor made to the OFFSHORE STRUCTURES.
The submerged and buried steel work of the jacket of an offshore platform is usually left uncoated, and cathodic protection is solely applied to protect these areas.
Sacrificial anodes for platforms are generally cast with tubular steel cores which are welded to the jacket bracing members. The current discharged from the anodes will protect the entire steel structure including the buried pipe piles and well castings.
In the case where continuous monitoring of the platform potential is required, permanent potential monitoring equipment including the monitoring anodes and monitoring instruments can be installed on the platform.
The columns or legs of jack up drilling rigs are generally coated with high performance protective coatings whereas the spud cans or mat are often left uncoated. When designing a cathodic protection system for a jack-up rig, the constraints by the rig operations must be taken into consideration.This would require the positioning of the anodes on the legs or spud can so as not to disrupt the jacking operations or transit of the rig.
For the protection of a semi-submersible rig, anodes installed on the columns and hull or Pontoon would be flush mounted to minimise resistance during transit.
Internal areas of the spud can or mat are invariably fitted with sacrificial anodes. The type and quantity of anodes are designed to ensure every compartment and corners of the tank internals are receiving full protection until the end of the anode design life.
Submerged fixed structural steel in a marine environment is one of the most critical areas for cathodic protection. Steel piling of these structures is often coated to some 3 to 5 metres. Below low water and is left bare below the depth Designers of these structures rely predominantly on cathodic protection to protect submerged and buried steel surfaces. With sacrificial anode systems, a large number of anodes are distributed throughout the piles and because of the even distribution of anodes,the level of protection is usually very uniform.
* Note
Anodes can be made according to the individual project design and quality assurance requirements of the customer.
