This European Standard specifies the structures, metals and surfaces which can be protected against corrosion by the application of internal cathodic protection, the electrolytic solutions and the conditions necessary for the application of internal cathodic protection and gives guidance on the application and operation of an effective internal cathodic protection system.
This standard applies to the internal cathodic protection of domestic water heaters, hot and cold water tanks, circulating water pipes, condensers, heat exchangers and, generally speaking, to every structure containing an electrolytic solution that it is technically possible to cathodically protect. This standard applies to metallic structures which contain stored or circulating water, which can be stagnant or renewed, cold or hot, drinking water or industrial water and also to aqueous suspension.
NOTE Electrolytic solutions are assumed to have a conductivity > 10 Siemens m, and a pH > 4,5. Where the pH < 5,5 or the conductivity less than 10 Siemens m see 5.4 and 6.9.2.2.
This standard is applicable to metallic structures made from the following on their own or with others:
— iron and low alloy steel;
— galvanised steel;
— copper and copper alloys;
— lead;
— tin;
— stainless steels;
— aluminium and zinc;
— titanium.
This standard is applicable to the cathodic protection of uncoated metals, and of metals already coated with low or high insulation resistance coatings.
BS EN 12499:2003 Referenced Document
EN 50014 Electrical Apparatus for Potentially Explosive Atmospheres General Requirements (Incorporates Corrigenda September 1997 and April 1998)
EN ISO 8044:1999 Corrosion of Metals and Alloys - Basic Terms and Definitions ISO 8044: 1999
BS EN 12499:2003 history
0000 BS EN 12499:2003(2006)
2003BS EN 12499:2003 Internal cathodic protection of metallic structures