Verification of rust prevention effects in air conditioning piping at the University of Cambridge in the UK.

Completely prevent the deterioration of red rust in the air conditioning piping at Cambridge University! Red rust prevention device "NMR Pipe Protector."

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 hot water piping system. 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 due to 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 to indicate that the corrosion from red rust has stopped and that 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 standard, confirming the effectiveness of red rust prevention. *For more details, please refer to the PDF document or feel free to contact us.*

Renovation and repair methods