[NMR Pipe Protector Verification Results] Hospital #K

The progression of new red rust inside the piping has completely stopped! The durability of the red rust prevention effect has been demonstrated.

At Hospital #K, which was built 30 years ago, deterioration due to red rust in the air conditioning chilled and warm water piping using galvanized steel pipes (SGP) has progressed. To prevent leakage, a red rust prevention piping extension device called "NMR Pipe Protector" was installed. Before installation, a sample of the circulating air conditioning chilled and warm water was taken, revealing that the total iron content in the water was 3.6 mg/l, indicating significant red rust corrosion within the piping. Ten years after installation, effectiveness verification through sampling and analysis by an external organization showed that the iron content remained at a favorable level of 0.2 mg/l, demonstrating the sustainability of the red rust prevention effect provided by the product. 【Introduction Overview】 ■ Hospital Location: Edogawa Ward, Tokyo ■ Hospital Overview: 31 years old, 4 stories, 144 beds ■ Installation Date: December 2020 ■ Installed Piping/Number of Installations ・Secondary side chilled and warm water (supply) main line of air conditioning generator (SGP pipe 150mm)/PT-150DS×1 unit ■ Effect Measurement Method: Effect verification through sampling *For more details, please refer to the PDF document or feel free to contact us.

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【Effects After Installation】 ■ Two weeks after installation, the total iron concentration in the chilled and hot water was measured at 2.0 mg/l, showing a decrease, and four weeks after installation, the total iron concentration further decreased to 0.2 mg/l. ■ The progression of new red rust within the piping has completely stopped, and the previously occurring red rust has transformed into insoluble black rust, which is one-tenth the volume of the original rust. *For more details, please refer to the PDF document or feel free to contact us.