Method of welding tube to tube plate.

摘要

A method of welding a tube to a tube plate (1) suitable for use in the production of a heat exchanger. The method comprises steps of inserting the tube (2) into a tube receiving bore (6) formed in the tube plate (1), to a part of the depth of the tube receiving bore (6), expanding the portion of the tube end received by the tube receiving bore (6) to make the tube end closely contact with the wall of the tube receiving bore (6) and then welding the tube (2) and the tube plate (1) to each other.