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PDF File: Case Study: Permeation of GRE Isolation Gasket

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. Firstly, the application temperature had been tested, and in many cases had exceeded the manufacture’s recommended temperature values for the gasket kit. Secondly, and more importantly, the leak was attributed to permeation of the media through the GRE retainer of the isolation gasket.