ONEOK NGL PIPELINE, LLC
hazardous_liquid Incident —
Incident Information
| Report Date | — |
| Operator | ONEOK NGL PIPELINE, LLC |
| Commodity | — |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 31.05151, -95.24527 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
ON JUNE 30TH, 2020 AT APPROXIMATELY 8:28 PM, ONEOK PIPELINE CONTROL CENTER RECEIVED A GAS DETECT ALARM FOR THE ONEOK STERLING II GROVETON PUMP STATION. THE GAS DETECT ALARM ACTIVATED THE STATION SHUTDOWN AND ISOLATED THE PUMP STATION. ONEOK PIPELINE CONTROL DISPATCHED LOCAL FIELD OPERATIONS TO THE LOCATION. AT APPROXIMATELY 9:15PM, THE ONEOK FIELD OPERATOR ARRIVED ON SITE AND NOTICED VAPORS IN THE VICINITY OF THE NUMBER 1 PUMP. FIELD OPERATOR ISOLATED THE PUMP AND BEGAN EVACUATING HYDROCARBONS FROM THE PUMP AND ASSOCIATED PIPING AT 9:25PM. AFTER EVACUATION OF HYDROCARBONS, A PINHOLE LEAK IN THE OUTBOARD BEARING COOLER RETURN TUBING WAS DISCOVERED AS THE SOURCE OF THE RELEASE. THE AFFECTED TUBING WAS FOUND TO BE IN CONTACT WITH THE OUTBOARD OIL DRAIN PIPING, RESULTING IN A PINHOLE DEVELOPING IN THE TUBING, BECAUSE OF FRICTION. THE TUBING WAS REPLACED AND ADJUSTED SO NOT TO CONTACT THE OIL DRAIN PIPING AND THE PUMP RETURNED TO SERVICE. INVESTIGATION INTO THE CAUSE OF THE RELEASE, DETERMINED THE PUMP OIL DRAIN PIPING HAD INADVERTENTLY BEEN INSTALLED IN CONTACT WITH THE COOLER INLET TUBING DURING PREVIOUS MAINTENANCE ACTIVITIES.
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.