Two leaks in different segments of the sprinkler system
Type of system: dry system.
Material: hot dip galvanized steel (two-sided)
Two pipe samples were taken and further examined in the laboratory using:
The damage and leakage was caused by oxygen corrosion: this could occur due to the permanent presence of water together with air in the galvanized steel sprinkler pipe. Since this is a dry sprinkler system, the aerated water should not have been present (permanently).
The long-term presence of water in the pipes has created a very large number of corrosion pits spread over a large surface. All these corrosion wells will (could) lead to leakage in the long term. Even immediately drying the installation will not do much to prevent contamination because the process has been going on for a long time and water will remain in the layer of tubercles and corrosion products. In addition, the steel at the wells is no longer protected by a zinc layer. Any condensation formed there will therefore lead to ongoing corrosion. As a result, the only solution to the problem remains to replace the parts of the pipe network that have been corroded in the form of a well.