This standard specifies the structures, electrolytes, metals, surfaces which can be protected against corrosion by application of internal cathodic protection - specifies the conditions necessary to the application of internal cathodic protection - give guidances on realisation and operation of an efficient cathodic protection system of specific structures, namely - Domestic water heaters, appliances for heating and storage, feed tank with variable level, filtering tanks, internal surface of wells casing, internal surface of pipes, tubular heat exchangers.