Atmospheric Corrosion and Indoor Pipe Assessment

A year-long collection of utility data on behalf of Northeast Gas Association (NGA) and its New York member companies to investigate and statistically analyze atmospheric corrosion and leak investigation data from indoor gas piping inspections has been completed. The study quantifies the corrosion rates for various installation and environmental conditions and delivers results to provide the technical justification to enable NY utilities to develop and tailor a Distribution Integrity Management Program (DIMP) inspection plan with extended inspection intervals for specific interior operating environments.

A final report detailing statistical results and technical recommendations was developed and submitted to the New York Public Service Commission (NY PSC) for review and approval.

The findings led the NY PSC to allow operators to submit customized, risk-based plans for system risk-based inspections.

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