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In a heat exchanger, a thin tube plate is reinforced by means of a heavy support plate spaced therefrom. The tubes are fixed to the tube plate and pass through enlarged openings in the support plate but are anchored to the support plate by anchoring devices which allow the liquid to be heated to pas

In a heat exchanger, a thin tube plate is reinforced by means of a heavy support plate spaced therefrom. The tubes are fixed to the tube plate and pass through enlarged openings in the support plate but are anchored to the support plate by anchoring devices which allow the liquid to be heated to pass from the chamber provided between the two plates through the annular passages between the tubes and the enlarged openings of the support plate.

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Apparatus for cooling hot gas which consists of a vessel comprising a nest of tubes, the hot gas flowing through the tubes and cooling water or the like flowing round the tubes and the tubes being secured at least at one end in a tube plate which closes a hot gas supply chamber, characterized in tha

Apparatus for cooling hot gas which consists of a vessel comprising a nest of tubes, the hot gas flowing through the tubes and cooling water or the like flowing round the tubes and the tubes being secured at least at one end in a tube plate which closes a hot gas supply chamber, characterized in that the tube plate is of light construction, that immediately behind the tube plate a heavy support plate supported by the vessel wall is provided, that the tubes project through openings in the support plate, that the tubes rest on the side remote from the tube plate on the support plate via rings which are secured to the tubes, comprise passage openings for the cooling water or the like and adjoin continuous gaps disposed round the tubes, and that the space between the tube plate and the support plate lying therebehind is provided with a supply for cooling water or the like, the supply for the cooling water or the like being formed by a conduit led through an opening in the support plate and sealingly mounted in said plate, the end of said conduit being secured to the tube plate and the portion lying between the tube plate and the support plate comprising openings.