The expected faultless service life of ductile iron pipeline systems:
- In water supply networks under the condition of soil corrosion, stray current and absence of cathodic protection is 80 to 100 years;
Corrosion resisting prperties of ductile iron pipes are 5-10 times higher than steel pipes.
- In sewage networks with hydrogen sulphure it reaches 50 - 60 years.
|Total corrosion, mm/year
|Steam and hot water pipelines
|Petroleum containing liquids