AWWA INF52173

The distribution system of Northwest Suburban Municipal Joint Action Water Agency (NSMJAWA), Elk GroveVillage, Illinois is a fairly simple system, consisting primarily of a single loop. The distribution systemmains are of a large diameter and operate under relatively high pressure. In many cases, sections of main represent sole sourcesupplies to the customers. Much of the distribution system underlies or runs adjacent toinfrastructure the disruption of which would be unacceptable. A number of corrosion mitigation options were considered to correct known corrosionproblems on the NSMJAWA distribution system. Cathodic protection (CP) appeared to be the best answer in this case. Some of the reasons CP was chosen included the ability to install or apply the protectivemeasures at discreet locations which could be selected for ease of installation and minimal impact on surroundingfacilities and land use. CP also did not require excavation of the pipeline, other than at isolated locations. CP could be applied without taking the pipelines out of service, and perhaps most importantly, the design engineer had included provisions in the original system design which simplified the later installation of CP. This paper describes NSMJAWA's distribution system and corrosion problems and explores the reasons behind the selection of cathodic protection to solve these corrosion issues. Lessons learned during this process are also discussed. Includes 6 references, table, figures.

Product Details

Edition:

Vol. - No.

Published:

01/01/2000

Number of Pages:

14

File Size:

1 file , 2.6 MB