DIN 4753 is the leading industrial standard for the construction & enameling of hot water tanks, such as water heaters, solar tanks, storage tanks & boilers.
Section 3 of abovementioned standard is focused on the requirements and testing of corrosion protection on the water side by enameling.
DIN 4753-3 describes the following enamel requirements :
- Coating thickness
- Minimum
- Maximum
- Surface quality
- Visual defects
- Protective current
- Permissable voids
- Mechanical properties
- Adherence
- Impact
- Physical & chemical resistance
- Thermal shock
- Resistance against hot water
- Resistance against acids
- Hygienic safety
- Weight loss limits for various elements
To verify compliance with these enamel requirements, DIN 4753-3 refers and/or describes also the appropriate testing methods.
DIN 4753 refers to several other DIN standards, which are all written in German language.
Companies outside the Germany & Austria may apply corresponding ISO standards instead.
See our HVAC market page for more information about enameling hot water tanks.
- DEV Email 4/2023 published
- EEA Quality Requirements edition 5
- Bernd Reinmüller’s advice to coaters
- ISO enamel standards
- Other enamel standards
- German Enamel Standards
- American enamel standards
- Australian enamel standards
- Industrial standards for the enameling industry
- Update ISO standards for porcelain enamels
