# SOUTHERN NATURAL GAS CO — Gas transmission and gathering — incident on 2012-01-23

- **operation:** document
- **citation:** PHMSA Report 20120017
- **title:** SOUTHERN NATURAL GAS CO — Gas transmission and gathering — incident on 2012-01-23
- **source type:** incident
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2012-02-20
- **effective on:** 2012-01-23
- **summary:** Gas transmission and gathering incident. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 1 NATURAL GAS released, $330,000 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings. PHMSA trend classification: significant incident, not serious.
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**body:**

Gas transmission and gathering incident. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 1 NATURAL GAS released, $330,000 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20120017.

Operator ID: 18516.

Reported incident date: 1/23/2012 13:40.

Cause detail: EXTERNAL CORROSION

Cause detail: LOCAL PRODUCTION PLATFORM OPERATIONS PERSONNEL NOTIFIED SOUTHERN NATURAL GAS (SNG) COMPANY OF A POSSIBLE LEAK ON ITS 12" RISER PIPE ON THE EPL WEST DELTA BLOCK 29 PLATFORM. THE REPORT DESCRIBED THE RELEASE AS A MINOR SPRAY AT OR NEAR THE WATER LEVEL. UPON INVESTIGATION, SNG PERSONNEL DETERMINED THAT THIS WAS A RELEASE OF NATURAL GAS CAUSED BY EXTERNAL CORROSION. THE PIPELINE WAS REPAIRED BY INSTALLATION OF NEW PIPE. THE PIPELINE WAS RETURNED TO SERVICE MARCH 5, 2012.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — EXTERNAL.

PHMSA indexed costs: $334,375 reported total cost, $176,230.961 in 1984 dollars, $433,615.914 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.
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