TENNESSEE GAS PIPELINE CO (EL PASO) — Gas transmission and gathering — incident on 2012-02-01

Gas transmission and gathering incident in CARLISLE, SCHOHARIE County, NY. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 492 NATURAL GAS released, $103,000 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: 20120023.

Operator ID: 19160.

Reported incident date: 2/1/2012 7:46.

Location detail: 249.00

Cause detail: COMPRESSOR OR COMPRESSOR-RELATED EQUIPMENT

Cause detail: NATURAL GAS WAS RELEASED AT TENNESSEE GAS PIPELINE (TGP) COMPANY'S COMPRESSOR STATION 249 FROM UNIT 1A WHEN A COMPRESSOR ROD FAILED IN ITS THREADS. THE STATION'S ESD SYSTEM ACTIVATED AND EVACUATED THE STATION OF NATURAL GAS. THE UNIT HAS BEEN REPAIRED AND IS BACK IN SERVICE. A ROOT CAUSE ANALYSIS DETERMINED THAT THE FAILURE WAS LIKELY DUE TO A COMBINATION OF FACTORS, INCLUDING HIGH CYCLE LOW NOMINAL STRESS AXIAL FATIGUE, INSUFFICIENT TIGHTENING DURING THE LATEST MAINTENANCE ACTIVITY, AND THE PRESENCE OF LOWER STRENGTH MATERIAL NOT MEETING THE CHEMISTRY AND MECHANICAL PROPERTY REQUIREMENTS OF THE SPECIFICATION FOR NEW REPLACEMENT COMPRESSOR RODS.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — PUMP/COMPRESSOR OR PUMP/COMPRESSOR-RELATED EQUIPMENT.

PHMSA indexed costs: $104,300 reported total cost, $55,335.724 in 1984 dollars, $134,934.281 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.