B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
B21C 37/12 (2006.01) F16L 9/147 (2006.01) F28F 1/08 (2006.01)
Patent
CA 2654335
The present invention provides a tubular member (10) and method of forming the same in which the tubular member (10) comprises one or more strips of self overlapping helically wound material (12) having corrugations with radially adjacent curves sharing the same origin of bend radius O formed therein and including a step portion or depression (22) which allows the edges (14), (16) of each strip to lie within the profile of the combined strips. The structure is manufactured by helically winding said strip (12) in self overlapping manner such as to cause the edges (14), (16) to sit within the depression (22) whilst providing a multi-layer structure.
La présente invention concerne un élément tubulaire (10) et un procédé pour sa formation, l'élément tubulaire (10) comportant une ou plusieurs bandes de matériau (12) enroulé en hélice avec recouvrement présentant des ondulations dans lesquelles sont formées des courbes adjacentes radialement, partageant une même origine O de rayon de courbure, et comprenant une partie en escalier ou un renfoncement (22) qui permet aux bords (14), (16) de chaque bande de reposer à l'intérieur du profil des bandes combinées. La structure est fabriquée en enroulant en hélice ladite bande (12) de telle manière qu'elle se recouvre elle-même de façon à amener les bords (14), (16) à se placer à l'intérieur du renfoncement (22) tout en donnant une structure multicouches.
Helical Pipelines Limited
Iti Scotland Limited
Smart & Biggar
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