Duct

Abstract

There is disclosed a duct 10 for hot gases, such as a chimney, comprising first and second duct sections 20 each having a generally radially extending mating flange 30, 32. The duct sections 20 are disposed end-to-end such that the mating flanges 30, 32 cooperate with one another to form a joint. The duct also comprises a substantially annular sealing band 44 having a radially extending expansion channel 46 at least partly defined by first and second radially extending channel walls 52, 54. The sealing band 44 is disposed around the joint with the mating flanges 30, 32 disposed within the expansion channel 46. The mating flanges 30, 32 can move within the expansion channel 46 to accommodate dimensional changes of the duct 10 that may occur due to thermal effects.

Dependencies are inferred from the claim text.