Failure Investigation Report - Tennessee Gas Pipeline Co. - Internal Corrosion   [open pdf - 0B]

On December 8, 2010, Tennessee Gas Pipeline Company made a notification to the National Response Center reporting a natural gas release on their Tennessee Gas Pipeline (TGP) 100 system. Upon review of the information an investigator from the Southwest Region was dispatched to the accident site the following day. At approximately 4:25 pm CST, December 8, 2010, TGP identified a release of natural gas in the discharge header area of the TGP Station 17, System 100, at East Bernard, TX. The failed pipe consisted of 24' diameter, 0.500' wall, X‐40(40,000 SMYS) lateral that connected to the station discharge header piping. The TGP system is monitored by gas control in Houston, Texas and the station ESD was activated immediately when the incident occurred. The rupture had occurred in a dead leg of 24' diameter pipe connecting to the System 100 30' discharge header at the station. There were no fire or injuries associated with this failure, but FM 1162 was closed by local emergency personnel and two residences evacuated as precautionary measures until site was secured. It took 6 hours for the system to completely blow down after which the road was re‐opened and the residents returned to their homes.

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Pipeline and Hazardous Materials Safety Administration: http://phmsa.dot.gov/
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