ENTERPRISE PRODUCTS OPERATING LLC — Gas transmission and gathering — incident on 2013-01-04

Gas transmission and gathering incident in BOLING, WHARTON County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 6 NATURAL GAS released, $70,000 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: 20130012.

Operator ID: 31618.

Reported incident date: 1/4/2013 4:30.

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: AT 04:30AM ON JANUARY 4, 2013 FIELD OPERATIONS FOUND A CRACK ON THE STATION BLOW DOWN LINE AT THE WILSON STORAGE FACILITY. THE SECTION OF THE PIPELINE THAT CONTAINED THE CRACK WAS ISOLATED AND REPAIRS WERE MADE. THE CRACK OCCURRED ON A 24" X 8" SADDLE THAT SUPPORTED THE STATION VENT VALVE AND ACCUATOR. ENGINEERING ANALYZED THE AREA AND CONCLUDED THAT THE CRACK WAS CAUSED BY HARMONIC VIBRATION. TO RESOLVE THE VIBRATION ISSUE, THE SADDLE WAS REMOVED AND A 24" X 12" SPLIT TEE WAS INSTALLED TO SUPPORT THE BLOW LINE, VALVE, AND ACCUATOR. THE BLOWDOWN STACK WAS AS ALSO SHORTENED TO MITIGATE VIBRATION. THE INCIDENT WAS REPORTED ON JANUARY 9, 2013 AFTER IT WAS DETERMINED THAT THE REPAIR COSTS EXCEEDED THE 50 THOUSAND DOLLAR THRESHOLD.

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $70,200 reported total cost, $36,368.308 in 1984 dollars, $89,364.046 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.