Insulating Gasket Kits are used to seal and electrically insulate flanges to maintain the integrity of the piping system. By preventing metal-to-metal contact, they mitigate corrosion caused by the action of electrical currents or when used in conjunction with cathodic protection systems.
Insulating gasket kits include gaskets for separating flanges in metal piping systems, as well as non-conductive bushings and gaskets for preventing current flow through the connection. However, if these kits are not properly specified, manufactured and installed, they may fail.
The insulating gasket kit material should be of high insulating quality and, in addition to protecting the flange from corrosion, should also meet the pressure and temperature requirements of the system. The diameter of the insulating gasket should be equal to the diameter of the pipe. This will prevent any repair material from accumulating in the annular space between the gasket hole and the tube hole, preventing bridges from forming. Insulating gaskets shall be suitable for the intended flange rating, maximum pressure and temperature conditions of the system and working fluid.