"ONEOK NGL PIPELINE, LLC"
hazardous_liquid Incident — — May 13, 2017
Incident Information
| Incident Date | May 13, 2017 |
| Operator | "ONEOK NGL PIPELINE, LLC" |
| Commodity | HVL OR OTHER FLAMMABLE OR TOXIC FLUID WHICH IS A GAS AT AMBI |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 29.84123, -94.89244 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | THREADED CONNECTION/COUPLING FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $100 |
| Emergency Response | $300 |
| Other Costs | $0 |
Location Map
Incident Narrative
"AT APPROXIMATELY 22:20 ON 5/13/2017, ONEOK TULSA CONTROL RECEIVED A PRIORITY 1 STATION LOCK OUT ALARM DUE TO GAS DETECT AT ONEOK'S ENTERPRISE EAST DELIVERY. ONEOK PERSONNEL WERE IMMEDIATELY DISPATCHED TO THE LOCATION. UPON ARRIVAL ONEOK PERSONNEL BEGAN ISOLATING THE LEAK ON THE ONEOK 246A METER AND BLOWING DOWN THE METER THROUGH THE ENTERPRISE EAST FLARE SYSTEM. ONCE PRODUCT HAD BEEN REMOVED FROM THE METER, IT WAS DETERMINED 3/4"" PIPE NIPPLE, ON THE THERMAL RELIEF LINE, FOR THE INLET OF THE METER, HAD DEVELOPED A CRACK AND FAILED, CAUSING THE RELEASE. ONEOK'S INVESTIGATION DETERMINED A 3/4"" CHECK VALVE ON THE THERMAL PIPING, HAD FAILED IN THE OPEN POSITION, ALLOWING, HIGH RATES OF PRODUCT TO FLOW THROUGH THE 3/4"" PIPING. ONEOK REPLACED THE 3/4"" PIPE NIPPLE ALONG WITH THE CHECK VALVE ON THE THERMAL PIPING. ONEOK IS IT THE PROCESS OF REPLACING CHECK VALVES LOCATED IN SIMILAR OPERATIONS, TO PREVENT FUTURE FAILURES."
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.