How can the internal and external walls of ductile iron pipes be protected from corrosion?
Internal walls can be painted anti-corrosion paint, exterior anti-corrosion can choose to paint, but also useful anti-corrosion tape, or do 3PE anti-corrosion, look at your anti-corrosion requirements, cost budget and other construction objective conditions.
The inner wall is not needed and the outer wall is painted
Inner wall cement anticorrosive exterior wall asphalt anticorrosion
