Flushing of cooling water circuits depends on the level of contamination of the pipes and the operating temperatures of the cooling water. The hardness of the water in the system also pays a role. Some firms have specialised in the flushing of water-cooled power circuits. These firms work in cooperation with furnace manufacturers, and know the special features of the individual system components. The systems are usually flushed out with descaling agents in order to remove deposits, and then flushed through again to neutralise them with water from the municipal supply. These agents are environmentally friendly, and are also used in the foodstuffs industry.
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