air gap insulated exhaust gas manifold and a process for the preparation of an air gap insulated exhaust gas manifold

摘要

The invention relates to an air gap insulated exhaust gas manifold (1), having an inside tube structure (3), which is covered by an outer jacket (5) is surrounded, wherein between the inner tube structure (3) and the outer jacket (5) at least in some regions, an air gap (7) is formed, and provided with at least two flanges, namely at least one inlet flange (9) and at least one outlet flange. In this case, it is provided that the inner tube structure (3) in an interior of the outer jacket (5) with respect to the air gap (7) is formed in a gas-tight manner, and in that at least an end portion (17) of the inner tube structure (3) in one of the flanges in a flange plane (19) is displaceably received.