Gasket Novaphit frenzelit SSTC Graphite 3mm Sheet Gasket Novaphit SSTC is a graphite gasket material with inserts of acid-resistant stainless steel (1.4404, AISI 316 L) for the highest pressure and temperature requirements. Good media resistance and safety aspects even in applications with changing loads make the material superior. The expanded metal layer, due to its three-dimensional and non-intersecting geometry, is superior to standard graphite gaskets with tanged and flat metal inserts, and exhibits its recovery properties at tongue-and-groove flange connections. Studies have proven that at a pressure of 40 MPa, the leakage is approx. 50% lower than tangent metal gaskets. The graphite used in the SSTChas primitive numbers is of at least 99% purity and proves its quality especially by its exceptional ignition and oxidation loss values.