Recommendations: Water treatment and corrosion prevention

This guide is prepared and published by the Danish District Heating Association (Dansk Fjernvarme) – original language is Danish.

The guide to water treatment and corrosion prevention in district heating systems is intended as a guide to operations managers and other operating crew as well as a guide to consultants and contractors working with Danish district heating systems. The guide applies to all water-born district heating systems irrespective of operating temperature.

The purpose of this guide is both to express recommendations on water treatment in Danish district heating plants and to maintain and secure knowledge of water treatment in Danish district heating plants.

Use the guide as a handbook for water treatment and corrosion prevention in conventional district heating systems. In special cases and in case of abnormal operating situations, the guide shall be substantiated by special knowledge. The guide does not apply to water/steam circuits in combined heating and power plants, nor to water treatment for steam installations. In these cases, we refer you to specifications and recommendations for the relevant technologies.

Thus, the guide does not apply to special cooling circuits separated from district heating water such as motor circuits, heat pump circuits, and solar heating circuits.