NORTHERN NATURAL GAS CO
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | NORTHERN NATURAL GAS CO |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 32.97119, -102.74928 |
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 MARCH 20, 2018, THE RELIEF VALVE ON THE 30 INCH DIAMETER M840B IN THE PLAINS STATION YARD FAILED AND VENTED GAS TO THE ATMOSPHERE. A RELEASE OF 39 MILLION CUBIC FEET WAS REPORTED TO THE NATIONAL RESPONSE CENTER. THE LAST INSPECTION WAS PERFORMED ON MARCH 19, 2018. ROOT CAUSE: INTERNAL CORROSION IN MAIN VALVE BODY, PISTON AND SEAT, PILOT SEAT WAS HARD AND CRUSHED AND PILOT SPRING WOULD NOT HOLD A STEADY SET PRESSURE. THESE ISSUE CAUSED RELIEF VALVE TX-193 ' 2000 END OF 30-INCH-DIAMETER METER HEAD TO FAIL.
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.