Rust in Fire Fighting Sprinkler System

Dyeing and textile industry


The Prolem

This is a typical case, where the client didn't even know he had a problem to begin with. The firefighting system covers the whole production area. The system is always under pressure, so that in an emergency there is enough water to fight a fire. During services where some valves were opened, it could be seen that there was corrosion in the pipes. This leads to the risk, that in the case of fire, the rust particles will clog the spray nozzles of the system and not enough water can flow.

The Solution

One 3" Merus® ring was installed. At the feeding pipe of the fire figthing system, before the regular valve and the pumps. The Trial Target was to remove the existing corrosion and prevent the system from further corrosion, by flushing out the rust.

The Result

Directly after the installation a sample was taken at a shut off valve as far as possible away from the inlet. This was done slowly, so the water was mainly clear. Some days later a second sample was taken at the same place and under the same condition. This time the water was dark brown. In the sampling bucket, there was a thin layer of rusty particles to be seen. The client wouldn’t believe, how much rust was in the system and how well the Merus® ring was working in such a short time.

The system was cleaned by flushing water at several points in the system, unitl it became clean. This was done four times, until no more brown water present.

These days Sprinkler systems are a very common application for us. It has shown that this test is one of the fastest ways to show the client how efficient the Merus® technology is.


Scale in cooling loop Lime scale in a steam boiler Legionella in residential home for the
Condensate system Seawater boiler (evaporator) Hotel Dishwashers & washing machines
Motor cooling loop Corrosion in a steam boiler Limescale in village water supply
Fire fighting system Water Fountains Cooling loop for PET bottles