Steel pipes are essential for water infrastructure, but it takes the right coating to ensure corrosion protection, durability and hygiene. Whether drinking water, waste water or underground pipes – every application has specific requirements.
1️ Internal coatings – protection of the medium & pipe wall
🔹 Drinking water pipes – hygiene & resistance
Drinking water pipes must meet strict requirements (DVGW, KIWA, WRAS, etc.). The coatings must not release any substances into the water and must provide the smoothest possible surface to minimize deposits.
✅ Cement mortar (DIN EN 10298) – Mechanically robust, protects against corrosion.
✅ Epoxy resin (DIN 3476, DIN EN 10339) – Hygienic, smooth surface against deposits, but more sensitive than cement mortar.
✅ PE/PP linings – Resistant to chemicals, ideal for aggressive media such as seawater, but less common for drinking water.
2️ External coatings – Protection against corrosion & mechanical impact
✅ PE & PP (DIN 30670, DIN 30678) – Durable, mechanically robust corrosion protection.
✅ GRP (glass fiber reinforced plastic) – High chemical and mechanical resistance, especially for aggressive soils and demanding environmental conditions
✅ FZM (fiber cement) – additional mechanical protection, has an insulating effect against temperature fluctuations and is particularly resistant to environmental influences.
✅ Zinc & zinc-aluminum (DIN 30674) – cathodic protection, also effective in the event of damage.
✅ Epoxy resin (FBE, DIN 30671) – Chemically resistant, ideal for underwater installation, but mechanically more sensitive.
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