GULF SOUTH PIPELINE COMPANY, LP

Incident Narrative

SUMMARY OF OPERATIONS JUST PRIOR TO INCIDENT ON 02-14-2011. A) THREE TURBINES WERE RUNNING WITH A SUCTION PRESSURE OF 688 PSI AND A DISCHARGE PRESSURE OF 1137 PSI. B) AT 09:11:24 PM, GAS CONTROL PUT A STOP IN T7. C) AT 09:25:03 PM, ESD WAS ACTIVATED BY FIRE DETECTORS. THE INITIAL FIRE WAS A LUBE OIL FIRE. SUBSEQUENTLY AFTER AN ELBOW RUPTURED THE RELEASED GAS IGNITED AND BURNED UNTIL GAS FLOW WAS STOPPED. THE ROOT CAUSE OF THE INCIDENT WAS DETERMENED TO BE THE FAILURE OF A CHECK VALVE IN THE TURBINE UNIT DISCHARGE LINE. 1) CHECK VAVLE ON TURBINE UNIT T7 DISCHARGE LINE WAS DAMAGED. CHECK VALVE INTERNALS SEPERATED WHEN CENTER BOLT FAILED. FAILURE CAUSE WAS DETERMINED TO BE OVERTORQUING OF CENTER BOLT BY MANUFUCTURE DURING VALVE ASSEMBLY. 2) DICCHARGE VALVE ON UNIT T7 DID NOT FULLY CLOSE DURING THE UNIT SHUT DOWN BECAUSE PARTS OF THE CHECK VALVE INTERNALS WAS STUCK IN THE VAVLE. 3) 24"" ELBOW LOCATED IN THE BASEMENT ON THE SUCTION LINE OF UNIT T7 COMPRESSOR, RUPTURED FROM A MANUFACTURING DEFECT WHICH WAS WEAKENED BY THE HEAT FROM THE LUBE OIL FIRE ALOWING GAS TO BE RELEASED INTO THE COMPRESSOR BUILDING AND IGNITE. THE DAMAGED FACILITIES HAVE BEEN REPAIRED AND RETURNED TO SERVICE ON 07-16-2011. UPDATED PART E.5F AS REQUESTED BY PHMSA.