CASING PIPE FOR USE IN AN EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE AND HONEYCOMB BODIES AND EXHAUST GAS SYSTEM COMPRISING AT LEAST ONE CASING PIPE AND A METHOD FOR THE PRODUCTION OF A CASING PIPE

摘要

The casing pipe (1) according to the invention for use in an exhaust gas system of an internal combustion engine, the casing pipe (1) comprises an inner (2) and at least one outer casing pipe (3), is characterized in that the inner casing pipe (2) is made of an austenitic steel, and the outer casing pipe (3) is made of a ferritic steel. The casing pipe (1) according to the invention advantageously allows for a construction of the honeycomb bodies (6) according to the invention, and the exhaust gas systems (13) according to the invention, wherein the corrosion of the casing pipe (1) is effectively prevented, for example, by means of a urea water solution (17).