FLEXIBLE CONDUIT FOR STATIC USE IN A CORROSIVE ENVIRONMENT

摘要

The invention concerns a flexible tubular conduit for transporting fluids under pressure containing H2S. The conduit comprises a casing (7), an internal sheath (8), at least a steel armouring ply (9, 10) resistant to forces induced by the internal/external pressure difference, at least a steel armouring ply (11, 12) resistant to traction helically wound along an angle less than 45 DEG relative to the conduit axis. Inside said conduit, at least the armouring ply (9, 10) resistant to forces induced by the internal/external pressure difference is made of steel selected to observe criteria of resistance to H2S, and at least the armouring ply (11, 12) resistant to traction is made from steel wires not observing the criteria of resistance to H2S. The Invention also concerns a method for designing a flexible conduit for transporting fluids under pressure containing H2S.