"AMERICAN MIDSTREAM BAKKEN, LLC"
hazardous_liquid Incident — — November 4, 2018
Incident Information
| Incident Date | November 4, 2018 |
| Operator | "AMERICAN MIDSTREAM BAKKEN, LLC" |
| Commodity | CRUDE OIL |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 47.75910, -103.32878 |
Cause
| Cause | EXCAVATION DAMAGE |
| Subcause | EXCAVATION DAMAGE BY OPERATOR'S CONTRACTOR (SECOND PARTY) |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $48,760 |
| Emergency Response | $5,000 |
| Other Costs | $22,000 |
Location Map
Incident Narrative
"AMERICAN MIDSTREAM RECEIVED THE COMPLETED ANALYSIS REPORT FROM STRESS ENGINEERING SERVICES REGARDING THE FAILURE OF THE PIPELINE. SES WAS ASKED TO DETERMINE THE MECHANISM OF FRACTURE FOR THE WELD NECK FLANGE. SES PERFORMED VISUAL EXAMINATION, WET FLUORESCENT MAGNETIC PARTICLE EXAMINATION, SCANNING ELECTRON MICROSCOPY(SEM) ANALYSIS, METALLOGRAPHY, HARDNESS TESTS, AND CHEMICAL ANALYSIS. BASED ON THESE TESTS AND ANALYSES, SES CONCLUDED THE FOLLOWING: 1. THE WELD NECK FLANGE SEPARATED ADJACENT TO A WELD BY BENDING OVERLOAD MECHANISM LIKELY FROM AN EXTERNAL SOURCE. THE FRACTURE EXHIBITED A 45 DEGREE SHEAR, DUCTILE DIMPLES, GRAIN DEFORMATION AND NECKING TYPICAL OF AN OVERLOAD FRACTURE. 2. NO BRITTLE OR FATIGUE FRACTURE FEATURES WERE EVIDENT ON THE FRACTURE SURFACE. 3. THE FERRITE-PEARLITE MICROSTRUCTURE AND HARDNESS OF THE WELD NECK FLANGE IS TYPICAL OF CARBON STEELS. NO MANUFACTURING ANOMALIES OR DISCREPANCIES WERE OBSERVED IN THIS ANALYSIS. 4. THE CHEMICAL ANALYSIS OF THE WELD NECK FLANGE WAS SATISFACTORY TO THE REQUIREMENTS OF SPECIFICATION ASTM A694, GRADE F52."
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.