Inmarco Industries offers Gasket Tape for Flange Joints. Inmarco Ingraf FJ.
Advantages: can be used in tandem as a complete gasket with conventional gaskets types such as PTFE spiral wound, metallic, etc; can be used to form gaskets from as small a diameters as 1" to very large diameters; nuclear compatibility, radiation resistance - 1.5 x 109 rads; conforms to surface irregularities; and non-sticking while dismantling.
Typical applications: heat exchangers, reactors, pumps, valves, bonnets and for various services conditions, as a seat to spiral wound and metallic gaskets.
The flanges are made from fragile materials like glass to encapsulate and enhance the sealing efficiency of other gasketing materials such as PTFE, asbestos or metal.
Construction: corrugated foil with or without adhesive backing; carbon content-min 99% or more; chlorides content-less than 50 ppm; ash content-max 0.5% onto 1%; and radiation resistance 1.5 x 109 rads. 'Ingraf gasket tape is made from 100% pure flexible graphite specially corrugated to enable ease of installation over flanges with circular or with complex sealing area.
The tape has a unique self-adhesive backing for overhead or vertical flange surfaces. At high temperature, the adhesive would integrate itself with the graphite by carbonising.
This tape is also available without any adhesive backing.