NATURAL GAS PIPELINE CO OF AMERICA (KMI)
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | NATURAL GAS PIPELINE CO OF AMERICA (KMI) |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 41.23526, -91.35004 |
Cause
| Cause | NATURAL FORCE DAMAGE |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
WITH EXTREME COLD TEMPERATURE OF APPROXIMATELY -6 DEGREES F AND WIND CHILL OF APPROXIMATELY -21 DEGREE F, SUSPECTED LIQUIDS IN THE RELIEF VALVE SENSING LINE AND RELIEF VALVE PILOT FROZE CAUSING THE RELIEF VALVE TO PREMATURELY OPEN. SAID RELIEF VALVE IS LOCATED OUTSIDE THE COMPRESSOR BUILDING ON THE UNIT 9 DISCHARGE PIPE. LOCAL SOFTWARE RECOGNIZED THE RELIEF VALVE EVENT AND IMMEDIATELY SHUT DOWN UNIT 9 HOWEVER THE RELIEF VALVE CONTINUED TO RELEASE GAS. NIGHT SHIFT STAFF WERE ON SITE WORKING THE COLD WEATHER SHIFT AND INVESTIGATED THE GAS RELEASE WITH IMMEDIATE ATTEMPT TO RESET THE RELIEF VALVE. THE STAFF APPLIED HEAT TO THE RELIEF VALVE TO THAW ANY SUSPECTED ICE AND MANUALLY CLOSED THE LINE VALVE TO ISOLATE THE RELIEF VALVE; THE RELIEF VALVE THEN RESET. STAFF RETURNED THE ISOLATION VALVE TO THE OPEN POSITION AND RETURNED UNIT 9 TO SERVICE.
About This Pipeline Incident
Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.