This 10” OD tee petroleum line on an offshore oil platform in Mexico was experiencing severe pitting due to atmospheric conditions causing a 50% wall loss over a 2’6”(.8m) section.
This line operates at 100 psi (6.8 bar) and 100°F (38°C).
The first step in the repair process was to complete surface preparation in accordance with SSPC-SP3 “Power Tool Cleaning” using an MBX Bristle Blaster. Next, the defects were coated using Syntho-Poxy™HC, a high-compression-strength, liquid epoxy, which provides a load-transfer medium. Then, Thermo-Poxy™ epoxy was applied over the entire repair area to provide corrosion protection to the bare steel, locking out any environmental atmospheric conditions while also acting as a primer for Thermo-Wrap™CF, a chemically resistant carbon fiber composite repair system which was developed for high temperature applications. Thermo-Wrap CF carbon fiber composite system was applied at the calculated number of layers over the required repair length, fully restoring the integrity of the pipe. Lastly, Syntho-Glass®UV was applied to provide UV stabilization for the composite repair system.
In only a few hours, NRI was able to repair the external pitting and restore the pipe to its original design pressure. By utilizing a Thermo-Wrap CF was installed by certified technicians and quickly restored the pipeline to its original design specifications in a matter of four hours, which saved time and other resources.