Wrapping iron pipe in polyethylene encasement has been used successfully for over 50 years to combat against external corrosion. This proactive corrosion control approach represents an incidental cost when included in the construction of ductile iron pipe and can extend the pipe service life for many years. This paper presents utility case histories where polyethylene encasement is used in highly corrosive soils as a standard corrosion control practice. Also included are the results of an industry poll on this matter distributed to utility operators throughout the United States and Canada. Success stories and lessons learned are provided.
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