Tube bundle heat exchanger

The invention relates to shell and tube heat exchanger having a plurality of pipe windings extending from a common inlet space for a heat medium and open into a common outlet space, each pipe winding comprises an alternating sequence of pipe sections and pipe bends; and wherein the bends are formed as deflection by 180 ° with respect to an associated arc axis and having equal bending radii. The invention is characterized in that along each tube winding are the arc axis of tube bends that are connected to the same pipe section in angular position to each other and the arc axis of pipe bends between which a piece of pipe in immediate succession, a tube sheet and a further pipe section are arranged parallel.