Tim Hurley, GPT Industries, USA, explains how fiberglass reinforced epoxy products can be used to prevent galvanic corrosion in flanged piping systems.
A utility company operating out of the east of America approached GPT as they had encountered a leak and isolation failure following hydro-testing of their pipeline. The monolithic isolation joint (MIJ) they had installed had only been in service for one hour. This was not an isolated case, subsequently two more utilities companies approached GPT in short succession to report of similar failures during the installation and hydro-testing process. These failures occurred at various locations up and down the east coast of the USA.
An operator of an established Oil field in the UAE approached GPT after encountering the same persistent problem with its flange isolation gaskets (kit) at two sites. Two to three years after the installation of an isolation gasket that was recommended by an engineering consultant, the flanges began to leak. On closer inspection, this was a unique incident. It was found that the conventional GRE (Glass Reinforced Epoxy) flange isolation kit (FIK) installed was not compatible with the application.
Engineering firm had a refinery client that had a high temperature and pressure application that also needed to be fire rated.