A floating device (2, 102) for pipes (1) is described comprising at least two floating elements (3) each comprising a substantially semi-tubular body (4) and removably associable so as to define a pipe (1) housing seat (5), wherein the substantially semi-tubular body (4) of the floating elements (3) comprises at least a first protrusion (6) and at least a first slot (7) at a first longitudinal edge (8) thereof and at least a second protrusion (9) and at least a second slot (10) at a second opposite longitudinal edge (11) thereof; advantageously, the protrusions (6, 9) are substantially aligned with the slots (7, 10) at opposite parts with respect to a longitudinal centerline plane (TXL) of the floating element (3) so as to allow at least a partial interpenetration of the substantially semi-tubular bodies (4) of the floating elements (3).