Flange-toflange insulation is achieved by a composite disk that also provides the piloting between the hub OD and the rest of the coupling, Figure 4. This disk is bonded to the hub with epoxy.

Thermal insulation jackets: designed to reduce heat loss from ductwork, valves, flanges, boilers, heat exchangers, pumps, and other fittings. Industrial gaskets: ring, full face, or spiral wound.