About the product

Internal lining for ductile iron pipes is available in several versions, selected according to the medium in the pipeline. Centrifugally applied cement mortar (CML) is the standard choice for drinking water and gives a smooth, dense surface where the alkaline reaction of the cement passivates the pipe wall and counteracts corrosion, pitting and red water. The cement mortar can be supplemented with an epoxy seal coat. For aggressive wastewater and industrial effluent, polyurethane coating is recommended, which withstands pH 2–14. Ceramic epoxy (ELECTROTUFF) is chosen where the requirements for mechanical strength and chemical resistance are highest. The lining is applied at the factory and maintains flow area and friction coefficient over a long service life, with a Hazen Williams C-value of at least 140 for centrifugally applied cement mortar.

Benefits

Centrifugally applied CML gives a C-value of at least 140
Reduces friction losses and pumping costs
Passivates the pipe wall against corrosion
Prevents pitting and red water
Maintains flow area and friction coefficient over a long service life
Polyurethane withstands aggressive wastewater, pH 2–14

Material specification

Component	Material
Internal lining, standard	Cement mortar (CML), centrifugally applied
Seal coat	Epoxy
Internal lining, aggressive wastewater	Polyurethane
Internal lining, highest requirements	Ceramic epoxy (ELECTROTUFF)