A rolling plant (1) for rolling billets or blooms, the plant defining a longitudinal feeding axis (X) of said billets or blooms and comprising
- a feeding area (2) for feeding said billets or blooms;
- a rolling train (3);
- a longitudinal roller table (4) to transport the billets or blooms from said feeding area (2) to said rolling train (3) along said longitudinal feeding axis (X);
- a welding machine (5) adapted to move forwards and backwards along said longitudinal roller table (4) to weld billets or blooms to one another when moving from said feeding area to said rolling train;
characterized in that said welding machine (5) is slidingly suspended from a bridge (7) and is adapted to translate parallel to said longitudinal feeding axis (X), and said bridge (7) is arranged at the longitudinal roller table (4) and is adapted to translate transversely to said longitudinal feeding axis (X), whereby in a first operating position of the bridge (7) the welding machine (5) occupies part of the longitudinal roller table (4) and can move forwards and backwards along said longitudinal feeding axis (X), whereas in a second operating position of the bridge (7) the welding machine (5) makes said longitudinal roller table (4) clear.