CMGC gasket applied to a large reactor vessel

The satisfactory sealing of large reactor vessel flanges in petrochemical plant is a significant problem. It is necessary to accommodate relative flange movement of large pressure vessels and provide a system where adequate bolting can be applied. The leakage from a large flange can be a major contributor to plant emissions. Here a corrugated metal graphite covered gasket has been used to seal a flange 20 feet (6 m) in diameter on a high-temperature (450°C) reactor vessel. This has resulted in a significant reduction in emissions and plant maintenance. This feature is based on the submission by the winning team in the Fluid Sealing Association's 2003 Environmental Achievement Awards.