Patent ID: 6253793
Filing Date: 2001-07-03
Classification: F16L

Abstract:
A flexible tubular pipe with an inside and an outside, the pipe comprising from the inside outward:an internal sealing sheath; anda cylindrical pressure vault outside the internal sheath, the pressure vault having an external face and having an internal face placed over the internal sheath;the vault comprising interlocked profiled metal wire wound in a helix with tunis at a relatively short pitch;wherein the profiled wire defining the vault has an I-shaped cross-section including a central web of a reduced thickness of a dimension 1 in the longitudinal direction, internal flanges toward the internal face of the vault and respectively directed upstream and downstream from the central web along the length of the pipe, and external flanges toward the external face of the vault and also respectively directed upstream and downstream from the central web,the internal and the external flanges of adjacent turns of the helically wound vault wire face each other;at least one of the internal flanges together and the external flanges together have a width L along the length of the pipe, wherein 0.2<l/L<0.6.