A method for the bending of a tube with an oblong cross section and heat exchanger with tubes with an oblong cross section and bent into u - the form of

摘要

process for the bending of a tube cross-section oblong for heat exchangers.the process includes the steps of causing a rotation of substantially equal amplitude at 350 between the two branches (2a.2b) of the tube (2) around an axis (8) parallel to the major axis (4) of the cross section of the tube in order to obtain two branches straight sections (2a.2b) connected to a portion of the junction arcuata (2c) and cause a rotation of substantially equal amplitude at 90 degrees between each of these branches straight sections (2a.the bridging portion 2b) and (2c) (fig. 4).