초록 ▼

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 hel

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°C. and reaches, at 800°C., 100% relative to the thickness at 20°C.

대표청구항 ▼

A method of providing a high-temperature resistant seal between end-to-end arranged flanged pipes, comprising the steps of clamping, between flanged pipe ends, a high-temperature resistant sealing gasket having opposite surfaces; the gasket comprising a flat mica mat including, in a superposed relat

A method of providing a high-temperature resistant seal between end-to-end arranged flanged pipes, comprising the steps of clamping, between flanged pipe ends, a high-temperature resistant sealing gasket having opposite surfaces; the gasket comprising 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; said scales being oriented, with their largest opposite faces, essentially parallel to the opposite gasket surfaces; said mica mat further including a binder situated between overlapping zones of immediately superposed scales; particular materials for said scales and said bineer being 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; said thickness increase starting at a temperature of about 500°C. and reaching, at 800°C., at least 100% relative to the thickness at 20°C.; and causing the sealing gasket to undergo a thickness increase by heating while said sealing gasket is in an installed state clamped between said flanged pipe ends.