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The university's air conditioning hot water piping has been plagued by issues related to internal red rust, and although a sacrificial anode was introduced in 2008 as a countermeasure, the progression of red rust did not stop. Additionally, a rust inhibitor was administered once a year, but there was no change in the iron content in the water before and after the use of the rust inhibitor, raising concerns about its effects on human health. Therefore, in order to remove red rust and single-celled bacteria while maintaining the strength of the piping, an "NMR Pipe Protector PT-75DS" was installed in the air conditioning hot water piping (return pipe) of the Todd Building on campus. The iron content in the water, which was 43.81 mg/l before installation, decreased to 17.95 mg/l three weeks after installation. [Challenges] ■ Although a sacrificial anode was introduced, the progression of red rust did not stop. ■ A rust inhibitor was administered once a year, but there was no change in the iron content in the water before and after its use, and there were concerns about its effects on human health. *For more details, please refer to the PDF document or feel free to contact us.

London City University is one of the famous universities located in North London, using SGP for its air conditioning hot water piping. The piping in the building, which is over 40 years old, was experiencing red rust corrosion. To completely protect the piping from red rust corrosion, the "NMR Pipe Protector" was installed. Before installation, the iron content in the water due to red rust was 3.407 mg/l, but two weeks after installation, the iron content decreased to 0.084 mg/l. This demonstrated that our product prevents the occurrence of new red rust in the piping and reduces existing red rust to inert black rust. [Introduction Overview] ■ Building Name: London City University ■ Location: London, UK ■ Building Overview: 47 years old, university ■ Installation Date: June 13, 2013 ■ Installed Piping/Number of Units: Air conditioning hot water piping/PT-200DS x 1 unit *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce the verification results conducted by our company. Due to the deterioration of red rust in the water supply pipes, we installed the "NMR Pipe Protector." The iron content before installation was 1.1 mg/l, but it decreased to 0.22 mg/l within two months of installation, proving the rust prevention effect. 【Introduction Overview】 ■ Location: Kodaira City, Tokyo ■ Installation Date: December 12, 2012 *For more details, please refer to the PDF document or feel free to contact us.

In the year 2000, 13 years after its completion, it was discovered that there was leakage due to red rust deterioration in part of the chilled and hot water piping of C University Library. The circulating water was mixed with red rust, and the deterioration of the piping had progressed significantly. As a rust prevention measure inside the piping, rust inhibitors were regularly administered, but the red rust deterioration did not stop, and since 1996 (9 years after construction), partial updates of the piping had been underway. However, due to the presence of asbestos in the ceiling of the library, it was difficult to carry out renewal work on the main and branch pipes. Therefore, a red rust prevention device called the "NMR Pipe Protector" was introduced. The NMR Pipe Protector stops the red rust deterioration of the piping and can extend the life of the piping until the building's lifespan, making the removal of asbestos unnecessary and allowing for significant cost reductions. Since the installation work of the NMR Pipe Protector does not require water service interruption, construction could proceed while the building was in use, eliminating the need for the library and surrounding facilities to close. After installation at C University Library, the rust prevention effect in the chilled and hot water piping was confirmed by an increase in the amount of black rust among the red rust. After the introduction of the NMR Pipe Protector, the piping was removed, and quantitative proof of the conversion of red rust to black rust was established through mass analysis of rust samples.

The Kagurazaka campus of Tokyo University of Science was 26 years old at the time. The water supply pipes were made of PVC-lined steel pipes, and serious red rust blockages had occurred at the joints of the water supply pipes. Before the installation of the NMR Pipe Protector, an inspection of the red rust blockage rate in the toilet water supply piping revealed that the blockage rate was 35%, indicating significant red rust deterioration. After the introduction of the NMR Pipe Protector, a re-inspection was conducted at the same location 10 months later. The results showed that the red rust blockage rate had decreased to 31%, and it was verified that the red rust was gradually changing from a volume of 1/10 of black rust from the surface of the red rust. At Tokyo University of Science, the NMR Pipe Protector was introduced to extend the lifespan of the piping in buildings and facilities that were originally scheduled for replacement in 10 to 15 years.

At the Nihon University College of Engineering campus in Koriyama City, Fukushima Prefecture, the water supply pipes in several research buildings were significantly deteriorated due to red rust, resulting in red water coming from the taps on holidays and the following days. To reduce the future piping renewal costs by 1/5 to 1/10, a red rust prevention device called "NMR Pipe Protector" was installed. The results of an inspection conducted one month after installation clearly demonstrated the excellent performance of the NMR Pipe Protector. The iron content in the water due to red rust decreased to less than 1/10 of the pre-installation level (from 7.8 mg/L before installation to 0.1 mg/L after installation). Originally, the iron content was at 7.8 mg/L, exceeding the water quality standard value of the Water Supply Act (0.3 mg/L), indicating a very serious progression of red rust. However, after installation, it was significantly below that standard value, proving the rust prevention effect through the blackening of red rust and the extension of pipe life. The water quality was remarkably restored to a hygienically satisfactory level. The NMR Pipe Protector is an exceptionally effective rust prevention device that saves energy in creating new piping, thereby reducing environmental burden. *For more details, please refer to the PDF materials or feel free to contact us.

At Cambridge University, galvanized steel pipes (SGP), which are said to have a lifespan of about 20 years due to red rust, were used for the air conditioning hot water piping. As a result, they were severely troubled by the deterioration caused by red rust, until the introduction of the "NMR Pipe Protector." Before installation, the iron content in the circulating water flowing through the pipes, due to the leaching of red rust, was measured at 43.8 mg/l, indicating a very high level caused by red rust. However, just three weeks after installation, inspections showed that the iron content had decreased to less than half, at 18.0 mg/l. Furthermore, a follow-up inspection about a year after installation revealed that the iron content in the same hot water had decreased to 0.5 mg/l, completely preventing red rust and successfully reducing the iron content to about 1/100 of the level before installation. This is a sufficient value indicating that the corrosion from red rust has stopped and black rust formation has progressed. For comparison, the water quality standard set by the Japan Refrigeration and Air Conditioning Industry Association is an iron content of 1.0 mg/l. The result of 0.5 mg/l at Cambridge University is half of that, confirming the effectiveness of red rust prevention. *For more details, please refer to the PDF document or feel free to contact us.*

Christ's College, Cambridge University, originated from God's House, which was established in 1437, and was rebuilt and opened as Christ's College in 1505 at nearly the same location. It is also famous for producing numerous notable alumni, including Charles Darwin, the author of "On the Origin of Species." The university's air conditioning hot water piping has been troubled by issues related to red rust internally, and although sacrificial anodes were introduced in 2008 as a countermeasure, the progression of red rust did not stop. Additionally, an anti-corrosion agent was applied annually, but there was no change in the iron content of the water before and after its use, raising concerns about the agent's impact on human health. Therefore, to remove red rust and single-celled bacteria while maintaining the strength of the piping, an NMR pipe protector was installed on July 31, 2013, in the air conditioning hot water piping (return pipe) of the Todd Building on the university campus. The iron content in the water, which was 43.81 mg/l before installation, dropped to 17.95 mg/l three weeks after installation. As October arrived and the air conditioning hot water system operated at full capacity, the levels continued to decrease, reaching 0.5195 mg/l by August 5, 2014, 52 weeks after installation, which is about one-eighty of the original level.

In 2013, the "NMR Pipe Protector" was adopted at City, University of London, a prestigious university in the UK. The air conditioning hot water pipes used SGP (galvanized steel pipes), which led to the leaching of red rust, causing the water to become brown and murky, and there were occurrences of leaks from the pipe joints. It was necessary to take measures against the deterioration of the red rust in the pipes as soon as possible. After the installation of the NMR Pipe Protector, the progression of red rust completely stopped in just two weeks. The iron content in the circulating water within the pipes, which was 3.41 mg/l before the introduction of the NMR Pipe Protector, remarkably decreased to 0.08 mg/l. Theoretically, over 75% of the existing red rust was reduced to black rust by the NMR Pipe Protector. This confirmed the effectiveness of red rust prevention. The black rust formed by the NMR Pipe Protector acts to protect iron from red rust corrosion, and furthermore, black rust is a solid and dense crystal that is 1/10 the volume of red rust, thereby strengthening the pipe's durability. Thanks to the rust prevention effect of the NMR Pipe Protector, the air conditioning hot water pipes at City, University of London can now be used for over 40 years. *For more details, please refer to the PDF document or feel free to contact us.

London City University, located in North London, is one of the famous universities in the city. It uses SGP for its air conditioning hot water piping, and the pipes in buildings over 40 years old were experiencing red rust corrosion. To completely protect the piping from red rust corrosion, NMR pipe protectors were installed. Before installation, the iron content in the water due to red rust was 3.407 mg/l, but two weeks after installation, the iron content decreased to 0.084 mg/l. This demonstrated that the NMR pipe protectors prevented the occurrence of new red rust in the pipes and reduced existing red rust to inert black rust. With the conversion of red rust to black rust, the piping was completely protected from red rust corrosion, allowing the air conditioning hot water piping to be usable for over 40 years. ▼ For more details, please see the related link ▼