Confirmation of the effectiveness of NMR pipe protectors by the Yokohama City Waterworks Bureau.
Confirmed the rust prevention effect of the NMR pipe protector within the conditions of its effectiveness in the area of the piping.
To demonstrate the rust prevention effect of the NMR pipe protector, it is a condition that a certain amount of water flows within the piping. In the Konan Chuo area, where the rust prevention effect test was conducted, the minimum water usage for a 50A pipe was 4.4 tons per day, but only three households used this water, resulting in a total water usage of 1 ton per day (with an average usage of 350 liters per household), which is very low. In the Teramachi 2-chome area, the number of households using water for each branched pipe with a diameter of 50A was six and eight, respectively, with the six households using about 2 tons of water per day and the eight households having a total water usage of just under 3 tons per day. Due to insufficient water usage, a clear rust prevention effect could not be confirmed. However, in the Tsurumi Public Housing and Hazawa area, where similar verification tests were conducted, the conditions were met. In Tsurumi Public Housing, the red rust in the water supply pipe decreased from 0.27 mg/l to 0.12 mg/l six weeks after the installation of the NMR pipe protector, and an increase in residual chlorine concentration, which had been reduced due to red rust, was confirmed. In the Hazawa area, the residual chlorine concentration, which had decreased by 45.3%, improved significantly to a reduction of 13.6%. The Yokohama City Waterworks Bureau has concluded the tests as there are no more suitable locations to further test the rust prevention effect of the NMR pipe protector.
- 企業：日本システム企画 東京本社
- 価格：Other
