ENTERPRISE PRODUCTS OPERATING LLC — Gas transmission and gathering — incident on 2015-03-09

Gas transmission and gathering incident in LEAKY, REAL County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 6600 NATURAL GAS released, $225 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: 20150047.

Operator ID: 31618.

Reported incident date: 3/9/2015 5:00.

Location detail: REAL STATION

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: AT 06:00 OPERATIONS TECHNICIAN ARRIVED AT THE REAL COMPRESSOR STATION AND DISCOVERED A RELIEF VALVE VENTING NATURAL GAS TO ATMOSPHERE ON THE C-200 COMPRESSOR UNIT. TECHNICIAN RESPONDED IMMEDIATELY AND CLOSED THE ISOLATION VALVE TO THE 3X4" RELIEF VALVE THUS, ENDING THE EVENT. THIS UNIT HAS TWO RELIEF VALVES ON THE UNIT OPERATING IN PARALLEL AS A REDUNDANT SYSTEM. UPON FURTHER INVESTIGATION, IT WAS DETERMINED THAT THE RELIEF VALVE LIFTED PREMATURELY DUE TO A LEAK ON THE SENSING LINE FOR THE RELIEF VALVE DUE TO EXCESSIVE VIBRATION. THE SENSING LINE TUBING WAS REPLACED WITH ADDITIONAL SUPPORTS TO PREVENT FUTURE RECURRENCE.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $16,705 reported total cost, $15,393.626 in 1984 dollars, $19,040.418 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.