Coatings & Linings

Our ductile iron pipes can be adapted to diƯerent water qualities, soil conditions and project requirements through a suitable combination of internal lining an external coating.

In general, all the coatings and linings can be applied on any joint type. Exception is the XTJ jacking pipe. It is more limited.

External protection

The external coating provides corrosion protection against soil and environmental
exposure.

Corrosion level

Recommended external protection

General soil conditions
(most soils)

Zinc + HCPE finishing layer

Corrosive soils

Zn-Al rare earth alloy + blue epoxy coating, or Zinc + HCPE finishing layer + PE sleeve

Highly corrosive soils

Special coating (PU coating)

Internal lining

The internal lining protects the pipe on the medium side and influences hydraulic performance.

Standard solutions such as cement mortar lining are suitable for many general water applications, while enhanced and special linings such as seal coat, sulphur resistant cement mortar, high-alumina cement mortar, PU lining and ceramic epoxy lining are available for more demanding service conditions.

Lining type

Typical use / purpose

Cement mortar lining

Standard lining for general water applications

Cement mortar lining + seal coat

Enhanced lining with improved surface and hydraulic performance

Sulphur resistant cement mortar lining

For water with increased sulphate and higher corrosive potential

High-alumina cement mortar lining

For more aggressive water conditions

PU lining

Special lining for demanding chemical and operating conditions

Ceramic epoxy lining

Special lining for aggressive or abrasive service conditions

Certificates

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