Abstract: The invention relates to a flexible tubular duct for transporting gases under high pressure in the field of offshore oil exploitation. The duct is of the unlinked and smooth passageway type, and comprises from inside to outside an inner polymer tube, a pressure vault formed by the short-pitch rolling of at least one wire, a first inner pair of crossed traction armor plies, an intermediate polymer sleeve, a second outer pair of crossed traction armor plies and an outer polymer sleeve. The inner pair of traction armor plies is wound with a helical angle of less than 35° and the outer pair of traction armor plies is wound with a helical angle substantially equal to 55°.

Abstract: The invention relates to a flexible tubular duct for transporting gases under high pressure in the field of offshore oil exploitation. The duct is of the unlinked and smooth passageway type, and comprises from inside to outside an inner polymer tube, a pressure vault formed by the short-pitch rolling of at least one wire, a first inner pair of crossed traction armour plies, an intermediate polymer sleeve, a second outer pair of crossed traction armour plies and an outer polymer sleeve. The inner pair of traction armour plies is wound with a helical angle of less than 35° and the outer pair of traction armour plies is wound with a helical angle substantially equal to 55°.

Abstract: A multiple-tube flexible pipe (1) including a central flexible member (2) having high tensile and compressive strength, a casing (8) and a plurality of circumferentially arranged tubes (3) wound around the central flexible member to form at least one ply in a ring-shaped space between said central flexible member (2) and said casing (8). At least one of said circumferentially arranged tubes (3) has low compressive and/or tensile strength. The flexible pipe further comprises at least one flexible compressive force transmitting member (5) arranged in said ring-shaped space and adjacent to said tube (3, 4) having low compressive and/or tensile strength.