ONEOK NGL PIPELINE, LLC
hazardous_liquid Incident —
Incident Information
| Report Date | — |
| Operator | ONEOK NGL PIPELINE, LLC |
| Commodity | — |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 38.36916, -97.83204 |
Cause
| Cause | INCORRECT OPERATION |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
THE 11313 PIPELINE REACHED 109% OF MOP (787 PSI VERSUS 720 MOP) DURING A PIPELINE START-UP RESULTING IN A PRESSURE RELIEF VALVE AT THE 313 JUNCTION RELIEVING TO ATMOSPHERE. THE PRESSURE EVENT WAS THE RESULT OF ONEOK PIPELINE CONTROL OPENING THE 313 PIPELINE'S INLET VALVE (V26) IN ERROR WITH AN UPSTREAM PRESSURE EXCEEDING THAT SPECIFIED IN THE OPERATING PROCEDURE. IN ADDITION, VALVE V26 DID NOT RE-CLOSE QUICKLY ENOUGH, UPON DETECTING HIGH PRESSURE, TO STOP THE PRESSURE INCREASE PRIOR TO THE RELIEF VALVE ACTIVATING. IN IMMEDIATE RESPONSE TO THE EVENT, THE SCADA SCREEN HAS BEEN UPDATED TO PROVIDE ADDITIONAL CLARITY. ADDITIONALLY, A PROJECT IS UNDERWAY TO RELOCATE V26'S PRESSURE SWITCH TO THE UPSTREAM SIDE OF THE VALVE THUS PREVENTING THE VALVE FROM OPENING UNDER THIS SCENARIO.
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.