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, #IP, the hot water supply piping made of heat-resistant vinyl-lined steel pipes had significant red rust corrosion after 31 years of construction, raising concerns about leaks from the joints. Therefore, a red rust prevention and piping extension 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 running water for six days, the filter turned brown due to red rust generated in the hot water piping, revealing that the captured iron content was 150 mg/l, indicating that red rust corrosion in the piping 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 piping transformed into black rust that does not dissolve in water, demonstrating the rust prevention effect and extension of the hot water piping's lifespan. At hotel #IP, it was verified that if the use of the NMR Pipe Protector continues, all red rust in the air conditioning chilled water piping will change to black rust, and the cost will be less than one-fifth of the piping replacement work, allowing the piping to be extended until the building's lifespan. Naturally, leaks have been completely prevented thereafter.

Water treatment equipment