scope:

This European Standard specifies the principles and requirements for the design, implementation, commissioning, operation and maintenance of cathodic protection to mitigate corrosive attacks on the external surfaces of above ground storage steel tank (AST) bottoms in contact with soil, cushion or foundations. This European Standard applies both for new and existing tanks. EN 12954 addressing general information concerning principles of cathodic protection of steel in contact with soil and EN 14505 addressing the case of complex structures are referred to in the present standards. Detailed information concerning measurement techniques of cathodic protection given in EN 13509 are also referred to in the present standard. This European Standard is not applicable to reinforced concrete above ground storage tanks. NOTE 1 Cathodic protection of steel reinforced concrete structures is addressed in EN 12696. NOTE 2 Cathodic protection of internal surfaces of above ground storage steel tanks is addressed in EN 12499 for waters or EN xxxxx for oil & gas industries. NOTE 3 Cathodic protection of external surfaces of buried tanks is addressed in EN 13636.