Anomaly Description:
The riser had a slight leak and was deformed. Numerous attempts were made by different vendors to repair damage to a platform riser by means of composite repair systems. The repairs however were unsuccessful. Beruseal was called upon to perform on-line leak sealing.

Root causes:
Riser damage.

Integrity concerns:
There was a high risk of pollution.

Because there is a possibility of a complete weld failure, a strongback system had to be put in place to keep the system intact in the event that failure of the weld occurs. Space below the T-piece enclosure was very limited and Beruseal devised a plan to design a restraint that would go around the larger diameter pipe and tie in together with the enclosure.

Conclusion:
A polymer compound was injected into a sealing groove to avoid sealant entering the line through the defect. A safe and successful repair was implemented that allowed the client to operate at full capacity until the next planned shutdown.