Method for manufacturing exhaust gas ducting device

A method for manufacturing exhaust gas ducting devices, in particular exhaust gas cleaning devices, which each have an outer housing with an insert clamped therein, wherein the insert comprises a substrate traversed by exhaust gas, and an elastic compensating element surrounding the substrate, including the following steps:

• a) spreading each individual compensating element on a base and deforming each compensating element substantially vertical to the base by exerting a pressure, wherein the entire compensating element is subjected to a full-surface load,
• b) constantly increasing the pressure exerted in step a) up to a predetermined test limit,
• c) determining a setpoint deformation of the compensating element necessary to achieve a specified setpoint pressure based on the pressure and associated deformation from step a), wherein the setpoint pressure and the predetermined test limit lie in a damaging range of the compensating element, wherein the setpoint deformation is interpolated or extrapolated from the deformation upon application of pressure up to the predetermined test limit and is additionally adapted by a correction value, wherein the correction value considers a damage of the compensating element during the application of pressure up to the predetermined test limit, and wherein the predetermined test limit lies above the specified setpoint pressure,
• d) determining at least one parameter of the substrate individually,
• e) placing the compensating element around the substrate, and
• f) mounting the insert thus obtained in the outer housing having inside dimensions that correspond to outside dimensions of the insert with the determined setpoint deformation.