Below a summary of German standards applicable for enameling and/or enameled objects :
DIN – DIN 4753-1
Water heaters and water heating installations for drinking water and service water; requirements, marking, equipment and testing
Status: To Be Verified
DIN – DIN 4753-3
Water heaters, water heating installations and storage water heaters for drinking water – Part 3: Corrosion protection on the water side by enamelling and cathodic protection – Requirements and testing
Status: To Be Verified