Flat gaskets are always used when two flat surfaces have to be sealed statically. A typical example are piping systems with flange couplings and frame components with flat surfaces. There are almost no limits to the shape of these gaskets and thus to the requirements that can be met with in terms of media, temperatures and pressure. And as varied are the materials used, ranging from cork and rubber to high tech plastic materials and compound materials (for instance, plastic/metal), up to graphite and metal/graphite.