Longevity

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.

Total corrosion, mm/year
	Ductile Iron	Steel 20
Sea water	0,01-0,06	0,1-0,8
Steam and hot water pipelines	0,011	0,048
Petroleum containing liquids	0,013	0,053