The invention relates to an
orbital welding device for mobile use in order to join a first
pipe (1) and a second
pipe end (2) along a circumferential joint (3) by at least one
weld seam (4), particularly for producing a pipeline (5) to be placed on land. The inventive device includes a guide ring (6), which can be oriented toward the first
pipe end (1) and the circumferential joint (3), and an orbital
carriage (7) that can be motor-displaced along the guide ring (6) via an advancing device (8). On the orbital
carriage (7), a
laser welding head (12) for directing a
laser beam (10) into a
laser welding zone (13) is mounted in a manner that enables it to be oriented toward the circumferential joint (3) whereby enabling the production of the
weld seam (4) along the circumferential joint (3) by displacing the orbital
carriage (7). The laser beam (10) is produced by a high-power
fiber laser
beam source (9) located, in particular, on a mobile transport vehicle (35) while being situated at a distance from the orbital carriage (7), is guided by
light guide (11) passing through a tube bundle (50) to the orbital carriage (7) and then supplied to the
welding head (12). A significant
advantage of the invention resides in the fact that the joining of two pipe ends by only one single
welding process during a short period of time is made possible in the field with autonomous operation.