FLEXIBLE CONDUIT WITH PRESSURE VAULT INTERLOCKED FROM BELOW

摘要

The invention concerns a flexible tubular conduit comprising, from inside outwards, a inner sealing polymer sheath (1), a cylindrical pressure vault (2) having an outer surface (19') and an inner surface (19) arranged above the inner sheath (1), the vault (2) being formed by short-pitch butt-gap helical winding of an interlocked profiled metal wire (3), at least a web of long-pitch wound tensile armours and an outer protective and sealing polymer sheath; the interlock wire has the same height as the profiled wire and is interlocked beneath the neutral fibre of the wire, and the ratio of the profiled wire section over the interlock wire section ranges between 1 and 2 and the inertia ratio Iyy of the profiled wire over the interlock wire ranges between 1 and 2.