Determination of the anticorrosion paint suitable for the mainte nance of district heating pipes

摘要

Dalkia's district heating networks are made of steel pipes carrying hot or overheated water (from 110°C to I80°C). Those pipes are often insula ted and buried in a concrete channel. The lack of accessibility of the pipes makes maintenance difficult. That's why this maintenance is mainly curative. Due to economic and safety reasons, Dalkia would like to optimize the curative maintenance the pipes. To do so, 6 anticorrosion paints already used or in test on the field were qualified. The first step of this qualification consisted in the determination of the applicability of the paints at four temperatures (25°C, 70°C, 110°C and 180°C). The res ults show that 2 paints are suitable for district heating pipes.