PROCESS FOR WELDING PIPE CONNECTINS FOR HIGH TEMPERATURE APPLICATIONS

摘要

Process for welding pipe connections for high temperature applications, particularly in power plants, comprising a first pipe section and a second pipe section, wherein the first pipe section is made of a ferritic material having a first coefficient of thermal expansion (CTE1) and wherein the second pipe section is made of an austenitic material having a second coefficient of thermal expansion (CTE2), which is different from the first coefficient of thermal expansion (CTE1), and wherein the weld joint is made of an austenitic filler material which has a third coefficient of thermal expansion (CTE3) which is in the range of the, second coefficient of thermal expansion (CTE2) comprising the steps of: axially aligning the first and second pipe sections to be connected, making an at least partially V-shaped weld joint open radially inwards, performing an inside welding process inside the first and second pipe sections to be connected. The invention is further directed to such a pipe connection.