Flexible conduit for transportation of dry natural gas from sea platform, has casing including reduction unit for reducing effects of vortex on inner surface of casing vicinity of groove, and holes distributed on surface of strip

摘要

The conduit has a tubular casing provided in contact with natural gas, and including a metal strip enrolled in helix shape along an axis (AA') of the conduit for forming number of turns. The strip has an S-shaped profile presenting loops (B1, B2), where each turn of the strip cooperates with adjacent turns to form a helical groove in an inner surface of the casing. The casing has a reduction unit i.e. plate (T1), reducing effects of vortex on the inner surface of the casing vicinity of the groove, where the vortex is generated by flow of gas. Holes are distributed on a surface of the strip.