"ONEOK NGL PIPELINE, LLC"
hazardous_liquid Incident — — August 7, 2019
Incident Information
| Incident Date | August 7, 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 | 41.56536, -93.52586 |
Cause
| Cause | INCORRECT OPERATION |
| Subcause | EQUIPMENT NOT INSTALLED PROPERLY |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $100 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON 8/7/19, THE 101 MAIN FILTER VESSEL BEGAN LEAKING FROM THE SEAL AREA. THE OPERATOR NOTICED A VAPOR CLOUD AROUND THE VESSEL AND PIPELINE CONTROL WAS CALLED TO SHUT DOWN THE PIPELINE. ONCE THE RELEASE STOPPED, THE VESSEL WAS MANUALLY BLOCKED IN AND BLOWN DOWN. A CONTRACTOR WAS CALLED TO THE SITE TO ASSIST MAINTENANCE PERSONNEL WITH INSPECTION OF THE GASKET AND TO RE-TORQUE FLANGE BOLTS. AN ESTIMATED 3.5 BBLS OF PROPANE WERE RELEASED TO ATMOSPHERE. THE VAPOR CLOUD DID NOT LEAVE THE PROPERTY BOUNDARIES. UPDATE: 9/13/19 AFTER COMPLETING THE INVESTIGATION OF THIS INCIDENT, SEVERAL CHANGES HAVE BEEN IMPLEMENTED TO HELP PREVENT THIS INCIDENT FROM OCCURRING AGAIN. THE CURRENT TORQUE PROCEDURES HAVE BEEN UPDATED TO INCLUDE A NEW FLANGE BOLT TIGHTENING SEQUENCE. THIS SEQUENCE HAS ALSO BEEN PLACED ON SIGNS AT EACH INDIVIDUAL FILTER VESSEL. NEW FLANGE BOLTS HAVE BEEN INSTALLED ON THE VESSEL, AND NEW GASKETS HAVE BEEN ORDERED AFTER DETERMINING SHELF LIFE OF THESE GASKETS ARE 2 TO 3 YEARS. ONEOK PERSONNEL AND THE CONTRACTOR USED FOR THIS TASK HAVE BEEN RETRAINED ON THE NEW FLANGE BOLT TIGHTENING PROCEDURE. UPDATED BY: BRENT THEEDE COMPLIANCE SPECIALIST ONEOK, INC."
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.