"ONEOK NGL PIPELINE, LLC"
hazardous_liquid Incident — — December 13, 2016
Incident Information
| Incident Date | December 13, 2016 |
| 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 | $1,500 |
| Other Costs | $0 |
Location Map
Incident Narrative
"AT APPROXIMATELY 9:50 AM ON DECEMBER 13, 2016 THE ONEOK PIPELINE CONTROL CENTER RECEIVED PRIORITY 1 GAS DETECTOR ALARM AND EMERGENCY SHUTDOWN ACTIVATION OF THE ENTERPRISE EAST FACILITY (ONEOK SITE 246) IN MONT BELVIEU, TEXAS. ONEOK NGL PIPELINE PERSONNEL WERE DISPATCHED TO THE FACILITY. ONCE ONSITE, A VAPOR CLOUD AT THE ONEOK METER SITE WAS VISIBLE FROM THE ROAD. THE ONEOK EMERGENCY RESPONSE TEAM IN CONJUNCTION WITH THE ENTERPRISE PRODUCTS EMERGENCY RESPONSE TEAM RESPONDED TO THE RELEASE AND ISOLATED THE 12"" INLET BLOCK VALVE TO THE ONEOK 246A METER ALONG WITH THE THERMAL BY-PASS PIPING FOR THE METER, STOPPING THE RELEASE. THE PIPING SECTION WAS FLARED DOWN UTILIZING THE ENTERPRISE FACILITY FLARE. ONCE THE PIPING WAS DEPRESSURIZED, THE ONEOK NGL PIPELINE PERSONNEL IDENTIFIED A 3/4"" SCHEDULE 160 NIPPLE, WHICH IS PART OF THE THERMAL RELIEF PIPING, AS THE SOURCE OF THE RELEASE. THE 3/4"" NIPPLE HAD CRACKED AT THE THREADS WHERE IT CONNECTS TO THE METER PIPING. THE FAILED NIPPLE WAS REPLACED WITH A NEW SCHEDULE 160 NIPPLE AND FLOW RESUMED AT APPROXIMATELY 7:18 PM ON DECEMBER 13, 2016. PRELIMINARY FINDINGS OF ONEOK PERSONNEL INVESTIGATING THE CAUSE OF THE RELEASE POINT TOWARD THE POSSIBILITY OF THE NIPPLE BEING OVER-TIGHTENED AT INSTALLATION."
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.