1.1 ,Scope—,This specification covers various types, classes, and grades of flexible graphite material in which valve media temperatures are limited to a maximum of 966°,C. Where this specification is invoked as ASTM F2168, Sections 1 –, 18 apply. Where this specification is invoked as ASTM/DoD F2168, Sections 1 –, 18 and the Supplementary Requirements apply.