| abstract |
A high temperature iron-chromium-aluminium (FeCrAl)l alloy tube (1) extending along a longitudinal axis (C), wherein the tube is formed from a continuous strip (3) of a high temperature FeCrAl alloy and comprises a helical welded seam (2). The high temperature FeCrAl alloy tube is manufactured by feeding a continuous strip of the high temperature FeCrAl alloy toward a tube shaping station (4), helically winding the strip such that long edges (6, 7) of the strip abut each other and a rotating tube (1) moving forward in a direction parallel to its longitudinal axis is formed, and continuously joining said abutting long edges together in a welding process directly when the tube is formed, whereby a welded tube comprising a helical welded seam is obtained. |