ONEOK NGL PIPELINE, LLC
hazardous_liquid Incident —
Incident Information
| Report Date | — |
| Operator | ONEOK NGL PIPELINE, LLC |
| Commodity | — |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 43.11444, -105.85250 |
Cause
| Cause | MATERIAL FAILURE OF PIPE OR WELD |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
WHILE MAKING ROUNDS ONEOK OPERATOR NOTICED NGL VAPORS BEING RELEASED FROM A WELD ON THE WELD-O-LET PIPING OF THE BLOW DOWN PIPING DOWNSTREAM OF THE PIG TRAP ON THE 6"" SAGE CREEK PIPELINE. OPERATOR PUT THE PLANT INTO NGL TRUCKING MODE AND ISOLATED THE PIPELINE FROM THE PLANT. PIPELINE WAS SHUTDOWN AND PHILLIPS 66 WAS ASK TO PULL DOWNSTREAM PRESSURE FROM THE PIPELINE. AT APPROXIMATELY 20:49 LOCAL TIME THE FIRST MAINLINE BLOCKVALVE DOWNSTREAM OF THE PLANT WAS CLOSED TO ISOLATE THE FAILED SECTION OF THE PIPELINE. PIPELINE PRESSURE HAD BEEN REDUCED FROM 520 PSI TO 340 PSI.. RESIDUAL PIPELINE PRESSURE WAS VENTED FROM THE PIPELINE AT THE MAINLINE BLOCKVALVE TO ALLOW FAILED SECTION TO BE CUT OUT OF THE PIPELINE AND REPAIRS MADE. IT WAS DETERMINED THE WELD ON THE WELD-O-LET THAT CONNECTED TO A 2 INCH BLOW DOWN VALVE HAD FAILED AND A 1.5 INCH CRACK HAD DEVELOPED CAUSING THE RELEASE. UPON COMPLETION OF REPAIRS PIPELINE WAS RESTARTED. PIPELINE WAS CONSTRUCTED IN 1984.
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.