Life-cycle cost comparions of corrosion protection methods for ductile iron pipe

Various corrosion protection technologies are used for prevention of external corrosion on ductile iron pipe in soil. Example approaches are provided with guidance to ensure cost-effective solutions. These include: shope-coated pipe, shop-coated pipe with polyethylene (PE) encasement, joint bonding and corrosion monitoring systems, stray current control, life extension cathodic protection (CP), CP with PE encasement, CP of shop-coated pipe, and CP of pipe with a wax tape coating. Life-cycle cost analyses of alternative strategies are presented.