TABLE 5-1 Partial List of Bonded Dielectric Coatings on Steel Water Pipelines

Project and/or Source

Date of Construction and Type of Coating

Pipe Diameter

Pipe Length

Route Corrosivity

Notes (Any Problems or Corrosion Activity Reported)

Bureau of Reclamation Technical Memorandum 8140-CC-2004-1a

1960s to present

Varies

320 miles

Varies

No external corrosion leaks reported through 2008.

Southwest Pipeline Project, N.Dak.; Bureau

1983-1992 Tape

Varies; assume 24- to 36-inch

43 miles

Severely corrosive below 2,000 ohm-cm

No external corrosion leaks reported through 2008.

Mid-Dakota Rural Water System, Miller, S.Dak.; Bureau

1996 to 2002

Varies; assume 24-to 30-inch

25.4 miles

Severely corrosive

No external corrosion leaks reported through 2008.

Mni Wiconi, Pierre, S.Dak.; Bureau

1993 to 2007 Polyurethane

Varies; 24- to 30-inch

100 miles

Below 2,000 ohm-cm

No external corrosion leaks reported through 2008.

Lewis and Clark, Sioux Falls, South Dakota; Bureau

2003 to present

Varies; 24- to 54-inch

78.5 miles

Below 2,000 ohm-cm

No external corrosion leaks reported through 2008.

East Bay Municipal Utility District, Calif.

1920s, Aqueduct No. 1

65-inch riveted steel

90 miles

Varies

Leaks. Stopped after adequate cathodic protection (CP) levels were restored; no external corrosion leaks reported through 2008.

Cheyenne, Wyo.

1964, Stage 1 Coal tar enamel

26-inch

40 miles

Portions less than 1,000 ohm-cm

In 1987, 23 leaks on Stage I pipeline. After joint bonding and CP improvements were made and adequate CP levels were restored in 1990, no external corrosion leaks were reported between 1990 and 2008.

Shoshone Pipeline, Cody, Wyo.

1988-1990 Tape

24- to 36-inch

50 miles

Portions less than 1,000 ohm-cm

No external corrosion leaks reported through 2008.

aBureau of Reclamation, U.S. Department of the Interior, Technical Memorandum 8140-CC-2004-1, “Corrosion Considerations for Buried Metallic Water Pipe,” Washington, D.C., July 2004.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement