| 摘要 |
A high-temperature resistant sealing gasket, adapted to be clamped between flanged pipe ends for service in a static environment, comprises a flat mica mat including, in a superposed relationship, a great number of mica scales, each formed of a plurality of stacked, extremely thin mica platelets held together by natural cohesion. The mica scales are oriented, with their largest opposite faces, essentially parallel to the opposite mat surfaces. The mica mat further includes a binder situated between overlapping zones of immediately superposed scales. Particular materials for the mica scales and the binder are selected such that the mica mat, in a non-installed state, has the property of undergoing, when heated, a thickness increase in a direction perpendicular to the largest scale faces. The thickness increase starts at a temperature of about 500 DEG C. and reaches, at 800 DEG C., 100% relative to the thickness at 20 DEG C. |
