A flexible metal tube having a length and a longitudinal axis and suitable for forming a carcass of a flexible pipe for transport of hydrocarbons, the metallic tube comprises a plurality of consecutive windings of at least one elongate strip structure (2) comprising a bearing structure and at least one cover flange (9). The cover flange (9) is intended to cover the gaps (5) which appear when the elongate strip (2) is wound to form the flexible metal tube. When a fluid is flowing in the tube, open gaps may cause formation of vortexes in the flow which in most case is undesired.
