Agricultural success: NMR pipe protector that promotes the growth of tomatoes and strawberries.

In August 2001, 23 years after its construction, the Coop Nomura Minami Ishikiri installed a pipe rehabilitation device called the "NMR Pipe Protector." The vinyl-lined water supply pipes have a statutory useful life of 20 years, and although 20 years have passed, making it 43 years since construction, they continue to be used without any signs of red rust deterioration. A few years ago, a pipe inspection was conducted, confirming that the red rust had turned to black rust and that the deterioration of the pipes had stopped.

- DPE Factory Water Supply Piping This property, built 35 years ago, used galvanized steel pipes for the water supply piping, which led to leaks and the occurrence of red water due to red rust deterioration. A pipe diagnosis by experts indicated a lifespan of only 2 months, prompting the installation of NMR Pipe Protectors on the secondary side piping of the elevated water tank. After installation, since over 800 tons of water were used daily, the rust prevention effect was quickly realized, resulting in no leaks and the red water issue was resolved within a week. Since then, until the factory closed in the summer of 2020, the water supply pipes were used for 55 years without any red rust problems. According to the "Life Cycle Cost of Buildings" supervised by the Ministry of Land, Infrastructure, Transport and Tourism, the lifespan of galvanized steel water supply pipes is 15 years, but this became an example of extending their lifespan by 40 years. The main material of the current water supply pipes is vinyl-lined steel pipes, which have less red rust deterioration, so the installation of NMR Pipe Protectors is expected to enable even longer lifespan extension.

- T Building Water Supply Piping According to the "Life Cycle Cost of Buildings" supervised by the Ministry of Land, Infrastructure, Transport and Tourism, the statutory useful life of water supply piping made of galvanized steel pipes is 15 years. However, in Tokyo's T Building, after 37 years since its construction in November 2000, there was a leak from a part of the water supply pipe, and red water occurred, prompting the installation of NMR Pipe Protectors. Since the installation of the NMR Pipe Protectors, no new leaks have occurred, and the issue of red water has been completely resolved. Now, after 20 years, the water supply pipes have been in use for 57 years since construction, extending the statutory useful life by 42 years.

The Yokohama City Waterworks Bureau conducted a demonstration test to prevent the occurrence of red rust in water supply pipes and to solve the problem of decreased chlorine concentration in water due to red rust. This was verified using the water supply pipe in the bathroom of Room 102, which was vacant, in the Tsuzumi water reservoir's attached housing that was 20 years old at the time. The piping materials used included polyethylene-lined steel pipes in the shared areas and resin pipes in the exclusive areas, where red rust was found at the pipe joint. The iron concentration in the stagnant water at the bathtub water supply faucet before installation was 0.27 mg/l, and the residual chlorine at that time was 0.11 ppm. Additionally, over the two weeks prior to installation (with water flowing for 3 hours a day), the amount of red rust collected on the faucet filter was 13 mg/l, indicating significant corrosion of red rust at the pipe joints. After installing the NMR pipe protector on the water supply inlet piping (50A) for the entire Tsuzumi housing, the iron concentration in the stagnant water at the bathtub water supply faucet decreased to 0.15 mg/l after one week, while the residual chlorine increased to 0.56 ppm, five times higher than before installation. The NMR pipe protector completely halted the deterioration of red rust, proving that the surface of the existing red rust transformed into passive black rust and that the reduction of chlorine stopped. *You can download the materials for free. *Please feel free to contact us first.