MARATHON PIPE LINE LLC
hazardous_liquid Incident —
Incident Information
| Report Date | — |
| Operator | MARATHON PIPE LINE LLC |
| Commodity | — |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 40.63107, -80.44046 |
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
ON JANUARY 3, 2017 PRODUCT WAS IDENTIFIED ON THE GRAVEL SURFACE AT MPL'S MIDLAND STATION PIPELINE MANIFOLD, NEAR THE RISER FOR THE TANK LINE. THE PIPELINE WAS EXCAVATED AND THE SOURCE OF THE RELEASE WAS DETERMINED TO BE A PINHOLE LEAK AT A WELD ON AN ELBOW OF A SEGMENT OF IDLE PIPING CONNECTED TO THE TANK LINE. THE LINE WAS REPAIRED BY REMOVING THE FAILED SEGMENT AND INSTALLING A FLANGE AND A BLIND. THE RELEASE WAS PROMPTLY CLEANED UP AND FOLLOWING REPAIR THE SYSTEM WAS RESTARTED PER SCHEDULE. MPL COMPLETED INVESTIGATIONS INTO THE RELEASE AND DETERMINED THAT THE WELD CONTAINED SIGNIFICANT MISMATCH (HIGH-LOW) AND ONLY A FEW CAP WELD PASSES. THE LACK OF A ROOT BEAD PROVIDED A CREVICE ON THE PIPE INTERIOR WHERE CREVICE CORROSION AND MICROBIOLOGICALLY INFLUENCED CORROSION (MIC) OCCURRED, RESULTING IN THE PINHOLE LEAK. 3/22/17: PART C.3.H WAS UPDATED. PART C.4. WAS UPDATED WITH YEAR ITEM INVOLVED IN ACCIDENT WAS INSTALLED. PART D.8. WAS UPDATED WITH FINAL COSTS. PART G UPDATED WITH CAUSE INFORMATION. 6/16/17: PART C, QUESTION 3A: THE NOMINAL DIAMETER OF PIPE WAS UPDATED TO 4 INCHES.
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.