Measures for preventing red rust and water leakage in the hot water supply piping of a certain hotel.

Case study of introducing NMR pipe protectors for preventing red rust and extending the lifespan of hotel hot water piping.

At a certain hotel, due to significant red rust corrosion in the hot water supply pipes made of heat-resistant vinyl-lined steel, which had been in use for 31 years, there were concerns about leaks from the joints. Therefore, a red rust prevention and pipe longevity device called "NMR Pipe Protector" was installed. Before the installation of the NMR Pipe Protector, a white filter was attached to the hot water faucet, and after six days of water flow, the filter turned brown due to red rust generated in the hot water pipes, revealing that the iron content captured was 150 mg/l, indicating that red rust corrosion in the pipes was quite advanced. One month after the installation of the NMR Pipe Protector, a white filter was attached at the same location and under the same conditions as before, and the captured iron content decreased to 140 mg/l. Two months after installation, the iron content due to red rust further decreased to 17 mg/l, and the red rust in the pipes transformed into black rust that does not dissolve in water, demonstrating the rust prevention effect and longevity of the hot water supply pipes. At hotel #IP, it has been verified that if the use of the NMR Pipe Protector continues, all red rust in the air conditioning chilled water pipes will change to black rust, and the cost will be less than one-fifth of the pipe replacement work, allowing the pipes to last until the building's lifespan. Naturally, leaks have been completely prevented since then.

Water Treatment