MAGELLAN PIPELINE COMPANY, LP

Incident Narrative

DURING A FACILITY INSPECTION, LOCAL OPERATIONS DISCOVERED PRODUCT LEAKING FROM A BLIND FLANGE ON THE TANK TRANSFER LINE FOR TANK 4003. VALVES WERE CLOSED TO ISOLATE THE LINE SECTION. CLEANUP ACTIVITIES WERE INITIATED AND AFFECTED GRAVEL WAS REMOVED AND PROPERLY DISPOSED OF. THE LINE WAS ASSOCIATED WITH A NEW CONSTRUCTION PROJECT AND WAS PREVIOUSLY HYDROTESTED. BLIND FLANGES WERE ADDED AT ONE END TO ISOLATE THE TANK FROM THE TRANSFER MANIFOLD. THE TRANSFER LINE IS LOCATED IN A MANIFOLD WITH 2 OTHER TANK TRANSFER LINES AND A TRANSFER PUMP. THE BLIND FLANGE IS LOCATED IN A LOW SPOT RELATIVE TO THE REST OF THE TRANSFER PIPING RUN. THE RELEASE WAS CAUSED BY ICE ACCUMULATION IN THE FLANGE DUE TO LOW TEMPERATURES. ONCE THE AFFECTED SECTION WAS PURGED OF PRODUCT, THE FLANGES WERE INSPECTED AND THE GASKET WAS REPLACED. THE OTHER TWO TANK TRANSFER LINES IN THIS MANIFOLD WERE PURGED OF PRODUCT TO ENSURE NO WATER HAD ACCUMULATED AND WERE PLACED BACK INTO SERVICE. PREVENTATIVE ACTIONS INCLUDE REVIEWING PROJECT PLANS TO ENSURE MEASURES ARE IN PLACE TO DISPLACE AND DRY FACILITY LINES FOLLOWING HYDROTESTING AND CONDUCTING FIELD REVIEWS TO DETERMINE OPTIMAL LOCATIONS FOR ISOLATING NEW CONSTRUCTION PRIOR TO COMMISSIONING. SUPPLEMENTAL/FINAL FILED (01/10/2019): UPDATED PART H