Abstract: A heat exchanger arrranged in a horizontally positioned container for carrying extremely hot gaseous or vapor media, a heat exchanger unit including a bank of tubes defined by tube walls, an inner port, a collector connected to the inlet port and connected to the tubes, first and second outlet ports, first and second outlet port ocllectors each outlet port collector being connected to the outlet ports and a bracket suspension connected to passages of the container for suspendedly supporting each of the inlet port and the outlet ports. The inlet and outlet ports each have a central axis, each central axis passing through a center of gravity of the portion of the heat exchanger unit connected to the associated port. The each of the heat exchanger units includes, the bank of tubes formed of tube walls, inlet ports being connected to the collector and the outlet ports being connected to each of the first and second outlet collectors.

Abstract: A hot pipeline is welded to a flange which is supported by brackets connected to a nozzle. The pipeline with a flange can expand freely radially. Welded to the other end of the flange is a pipe, which can withstand an axial temperature gradient between a temperature T.sub.1 at the pipeline and flange, and a temperature t.sub.2 at a compensator and the nozzle. The axial expansion of pipe is accommodated by the compensator, which is welded to the pipe and at its other end to the nozzle. The pipeline, the flange, the pipe and the compensator are subject to the difference between pressure p.sub.2 in the vessel and the pressure p.sub.1 in the pipeline.

Abstract: A tubular heat exchanger for operation at high gas temperatures and high jacket pressures include tube sheets which are exposed to high loads so that both sheets are kept thin and tie rods bracing the tube sheets are arranged on at least every other graduated circle of a plurality of graduated circles or tubes and tie rods. The heat exchanger tubes arranged between the tube sheets have a helical shape in an intermediate or central region. The heat exchanger design can be used, for example, as a cracked gas cooler.