"ONEOK NGL PIPELINE, LLC"
hazardous_liquid Incident — — October 22, 2019
Incident Information
| Incident Date | October 22, 2019 |
| 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 | 36.77402, -97.75716 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | THREADED CONNECTION/COUPLING FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $6,400 |
| Emergency Response | $500 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON 10/22/19 AT 3:50 AM, PLANT OPERATORS IDENTIFIED VAPOR LEAKING FROM A 3/4"" THREADED NIPPLE ON STERLING 2 PUMP HEADER. PUMP HEADER ISOLATED AND PRODUCT REMOVED. ONEOK REPLACED FAILED 3/4"" NIPPLE AND ASSOCIATED BALL VALVE. PIPELINE WAS RETURNED TO SERVICE. ONEOK DETERMINED PIPE NIPPLE FAILED DUE TO HIGH CYCLE FATIGUE (VIBRATION) CAUSED BY THE PIPELINE CONTROL VALVE. ONEOK CONDUCTED VIBRATION STUDY AFTER INSTALLATION OF NEW PIPELINE CONTROL VALVE AND VIBRATION WAS REDUCED TO AN ACCEPTABLE LEVEL. ADDITIONALLY, ONEOK REPLACED ALL SIMILAR THREADED NIPPLES ON THE STERLING 2 PIPELINE HEADER SYSTEM."
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.