NATURE OF DEFECT
The 10.75” OD carbon steel Flare line was found to have severe external atmospheric corrosion, reducing wall thickness below the critical level. Though the defect was non-leaking, it had caused a 70% wall loss, posing significant risk under design conditions of 12.8 barg and 230°C.
SOLUTION
The repair successfully restored the line’s structural integrity and pressure containment without the need for shutdown or hot work. The composite solution provided a fast, cold-applied, engineered alternative to steel replacement in a critical offshore environment.
REPAIR METHOD
Surface Preparation was achieved via MBX tooling to SA 2.5 profile. Defect restoration was achieved using Dragon Epoxy to rebuild original geometry. A minimum 4 layers of composite Dragon X with 50% overlap, over a 15.8” repair length was installed. Curing using 8 layers of compression film until a minimum Shore D hardness of 74 was achieved.
