November 2016, Vol. 243, No. 11

Features

Spectra Energy Says Rapid Corrosion, Other Factors led to Salem Pipeline Incident

An interstate natural gas pipeline that exploded in Salem Township, PA in April had lost about 30% of its steel wall to corrosion four years earlier, said Spectra Energy officials. But officials said what was then considered a minor anomaly – a small area flagged for re-inspection five years later – corroded at an unprecedented rate that caused the explosion and spurred the company to re-evaluate long-standing industry standards. Spectra officials said they have shortened the length of time between inspections of similar transmission lines from every seven years to every three to four years. They will lower the threshold for flagging anomalies for action and will add an additional measurem

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