Overview

Internal corrosion of a crude header line was identified through NDT inspections. The corrosion was expected to form a 20mm through-wall defect within 5 years. 
Technowrap 2K™ High Temperature (HT) was required due to the high design temperature of the line. The defect was within 100mm of an existing metal clamp that had been installed to repair an earlier defect, presenting a challenge in achieving the required wrap bonding length.

Solution

• The high design temperature necessitated using the Technowrap 2K™ High Temperature (HT) system
• Wrap applied to both the corroding elbow and the adjacent metal clamp to ensure sufficient bonding
• Heat tape required for elevated temperature cure
• Rapid delivery of repairs (24 hours)

Benefits

• The repair was completed without the use of hot works
• Line remained live and  repair completed without a shut-down
• The Applicator’s extensive experience allowed the repair to be expertly applied to the complicated geometries of the pipe elbow and clamp
• Documented QA/QC procedures provide a complete record of the repair materials and application process for future reference
• Repair designed to accommodate internal corrosion causing a 20 mm through-wall defect