NUSTAR PIPELINE OPERATING PARTNERSHIP L.P.
hazardous_liquid Incident — — July 27, 2023
Incident Information
| Incident Date | July 27, 2023 |
| Operator | NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. |
| Commodity | HVL OR OTHER FLAMMABLE OR TOXIC FLUID WHICH IS A GAS AT AMBI |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 33.26331, -92.68999 |
Cause
| Cause | MATERIAL FAILURE OF PIPE OR WELD |
| Subcause | ORIGINAL MANUFACTURING-RELATED (NOT GIRTH WELD OR OTHER WELDS FORMED IN THE FIELD) |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $108,800 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
"AT 11:13 EDC PERSONNEL NOTIFIED NUSTAR OF A POSSIBLE AMMONIA LEAK BUBBLING UP UNDER THEIR RETENTION POND. THE PIPELINE WAS ALREADY SHUT DOWN DUE TO A PLANNED HYDROTEST FROM PEACE VALLEY, AR TO SALEM, MO. LOCAL PERSONNEL ARRIVED ON-SITE AT 11:48 AND CONFIRMED A LEAK, ISOLATED THE PIPELINE BY CLOSING MANUAL VALVES AND VERIFIED THAT AN MOV (23-4) WAS CLOSED. IN THAT AREA THERE IS AROUND 741 FEET BETWEEN MANUAL VALVES WITH AN ESTIMATED 2500 POUNDS THAT WAS RELEASED DURING THE EVENT. NO VAPOR CLOUD PRESENT AS IT WAS BEING RELEASED INTO THE RETENTION POND. THE RETENTION POND IS USED BY EDC TO HOLD THEIR PROCESS WASTEWATER. METALLURGICAL ANALYSIS CONCLUDED, ""THE FAILURE WAS THE RESULT OF SELECTIVE SEAM WELD CORROSION (SSWC). MULTIPLE WELD DEFECTS, INCLUDING LACK OF FUSION (LOF), WERE OBSERVED AT THE INNER DIAMETER (ID)."
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.