Abstract: An apparatus for cleaning a surface within a vessel has an elongate combustion conduit extending from an upstream end to a downstream end. The downstream end is associated with an aperture in the wall of the vessel and is positioned to direct a shockwave toward the surface. At least one hanger supports the combustion conduit at least one location along a length of the combustion conduit. A penetration conduit is positioned between the wall aperture and an associated portion of the combustion conduit. Means couple the combustion conduit to the penetration conduit so as to accommodate relative longitudinal movement and/or relative angular movement.

Abstract: An apparatus for cleaning a surface within a vessel has an elongate combustion conduit extending from an upstream end to a downstream end. The downstream end is associated with an aperture in the wall of the vessel and is positioned to direct a shockwave toward the surface. At least one hanger supports the combustion conduit at at least one location along a length of the combustion conduit.