Leakage prevention measures for the air conditioning piping at Hotel #T.

Case study of introducing NMR pipe protectors into hotel air conditioning piping.

At Hotel #T, when it was 29 years old, the deterioration of red rust in the air conditioning chilled and hot water piping made of galvanized steel (SGP) was very advanced, and leakage was occurring at the joints. Therefore, a red rust prevention piping longevity device called "NMR Pipe Protector" was installed. Before the installation of the NMR Pipe Protector, a sample of the chilled and hot water circulating in the piping was taken, revealing that the water was brownish due to red rust in the pipes, with a total iron content of 29 mg/l, indicating significant red rust corrosion. Two weeks after the installation of the NMR Pipe Protector, a water sample taken under the same conditions showed that the water was clear, and the total iron content had significantly decreased to 0.2 mg/l. Additionally, a water sample taken under the same conditions four weeks after installation also showed a total iron content of 0.2 mg/l, confirming that red rust deterioration had been completely prevented, and the red rust in the piping had transformed into black rust, which is insoluble in water and occupies one-tenth of the volume. At Hotel #T, it has been verified that if the use of the NMR Pipe Protector continues, all red rust in the air conditioning chilled and hot water piping will change to black rust, allowing the piping to be extended to the lifespan of the building at a cost of less than one-fifth of the piping replacement work. Naturally, leakage has been completely prevented thereafter.

Water Treatment