Severe external corrosion scabs with wall loss was noted throughout the line.
Nature of Defect
Severe external corrosion scabs with wall loss was noted throughout the line. Radiography was carried out at multiple locations with the lowest recorded thickness of 3.1mm. A composite repair was required to bring the line back to full operating conditions.
Solution
Metalyte Pipeworks solution was to apply 4 layers of their 2 part epoxy composite system. This would halt any further corrosion issues and build the strength back in to the line for full operational requirements.
Repair Method
The full length of the repair area was prepped to SSP-SP11 specification to remove all corrosion and gain the surface profile required for the composite to adhere to.
The flange was encapsulated then the full repair area had a resin bond coat applied prior to the application of the composite. The line was then wrapped in 4 layers of composite and allowed to cure.
