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Watermain Breaks - Materials Does Matter

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Watermain failures are not often recognized as corrosion but are usually referred to merely as “watermain breaks” because watermain pipe appears sound prior to failure. Some of the causes of watermain breaks are poor design, improper installation, surge or water hammer, soil movement, manufacturing defects, impact, internal corrosion, and external corrosion. Figure 1 shows some of the possible causes of the DI pipe.

Product Number: 51323-19290-SG
Author: Edward Larkin, Mehrooz Zamanzadeh (Dr. Zee), Aaron Ulmer, Nathan Pace, Anil Kumar Chikkam
Publication Date: 2023
$0.00
$20.00
$20.00

Watermain failures result in the investments of millions of dollars for repairs and replacements. The rate of watermain failures is expected to increase as the existing cast iron infrastructure continues to age. It is estimated that the United States should spend over $1 trillion on underground water infrastructure work over the next 25 years, and $1.7 trillion over the next 40 years. This paper is a continuation of CORROSION 2021 paper no. 16837. We will highlight the failure mechanisms, failure analysis protocols, and corrosion mitigation strategies for watermains that experience breaks. Watermain breaks are mainly due to corrosive soil, pipe material, galvanic action, stray current corrosion, or microbiological induced corrosion (MIC). This paper provides specific case histories involving graphitic corrosion, stray current corrosion, and tuberculation.

Watermain failures result in the investments of millions of dollars for repairs and replacements. The rate of watermain failures is expected to increase as the existing cast iron infrastructure continues to age. It is estimated that the United States should spend over $1 trillion on underground water infrastructure work over the next 25 years, and $1.7 trillion over the next 40 years. This paper is a continuation of CORROSION 2021 paper no. 16837. We will highlight the failure mechanisms, failure analysis protocols, and corrosion mitigation strategies for watermains that experience breaks. Watermain breaks are mainly due to corrosive soil, pipe material, galvanic action, stray current corrosion, or microbiological induced corrosion (MIC). This paper provides specific case histories involving graphitic corrosion, stray current corrosion, and tuberculation.

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Product Number: 37694-POD
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•Generalization of groundbed resistance combining the equation for anodes with different length and depth, with the equation for different distance between anodes.
 
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Picture for 51318-11244- MIC Considerations for Cathodically Protected Encased Ductile Iron Pipelines: A Case Study
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51318-11244- MIC Considerations for Cathodically Protected Encased Ductile Iron Pipelines: A Case Study

Product Number: 51318-11244-SG
Author: Jeffry B. Giddings / Mersedeh Akhoondan / Graham Bell
Publication Date: 2018
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A case study where MIC was recognized as primary cause of failure for an encased ductile iron water pipeline. The cathodically protected pipe was located within the proximity a creek crossing and had suffered from multiple failures.

 

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