Comparison; Tokyo and Seoul Feature Tokyo, Japan
Seoul, South Korea
Comments
Initial leakage rate Final leakage rate
15.4%
260m m 3 pa 33m m 3 pa
27.3%
502m m 3 pa 29m m 3 pa
2.1%
2.5%
Initial repairs per annum Final repairs per annum Stainless grade selected
70k 10k
45k 125 – 190 repairs per day
10k
25 repairs per day
316 (17Cr, 11Ni, 2Mo)
304 (18Cr, 9Ni) Soil chemistry difference
Financial savings
4,0bn USD over 34 years 4,7bn USD over 27 years Based on 1 USD per m 3
Water production per capita CO 2 Emissions Reduction
205 m 3 to 117 m 3
168 m 3 to 113 m 3
Annual rate
54k tons pa
110k tons pa Electricity reduction
Pipework
All stainless corrugated All stainless corrugated
Remaining fittings Residues in pipework
All stainless None evident
All stainless Vital to avoid leakages
None evident
Unlike plastic pipework
Timescale to 90% stainless
20 years
21 years
Additional Benefits
Proven resistance to seismic shocks (9 RS)
40% reduction in water treatment plants
29 Data Source; ISSF 2015
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