Design of a brazing connector for DEMO in-vessel components

•A conceptual design of a RH compatible pipe connection system based on brazing has been developed to be used in the DEMO breeding blanket.•Numerical analyses have been performed to evaluate the capabilities of the induction heating system and to pre-size its main parameters and geometries.•The induction heating system provides a fast way to ensure the sealing of pipes.•Screwing/unscrewing of stiffening captive bolts can slow down the maintenance procedure. An alternative clamped union based on a mechanical connector has been proposed.•Transmutation in the selected materials does not seem to be an issue, since the reduction of mass for the main elements of the different components is very low.