Flexible tubular pipe for transporting fluid and in particular of gaseous hydrocarbons, a frame and the inner sheath anti - turbulence

摘要

A body, placed inside the internal sealing layer, is made by the winding in stapled coils of a profiled element (7). The coils of the framework are covered internally with a layer (30) pierced with holes (31) designed to prevent turbulence in the fluid flowing in the pipe. - The pipe is an unbonded rough bore type with at least one framework (2), a polymer internal sealing layer (3) ensuring sealing for the transported fluid and one or more armor layers. The coils of the framework form between themselves internal joints (9) such that the holes in the pierced layer are partly positioned at the internal joints between the coils and prevent the formation of anti-turbulence during decompression of the pipe interior. At least 30% of the holes are placed at the internal joints between the coils. The pierced layer partially penetrates the internal joints. The holes are oblong and have a diameter of 1-8 mm. They are offset longitudinally with a pitch of 5-100 mm. The anti-turbulence polymer layer is strengthened with fiber or a trellis.