Flexible line pipe
AssigneeAlcatel
InventorKlaus Schippl
Life of this patent
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Abstract
In a flexible line pipe comprising an inner corrugated metal tube (4), an outer corrugated metal tube (5) located at some distance from the inner tube (4) and a spacer as well as an insulation material between the inner and the outer metal tubes, whereby a pressure that is less than atmospheric pressure prevails in the ring-shaped gap (6) between the tubes, the spacer comprises two cords (7, 8) made of fiber-reinforced plastic applied to the inner tube (4) and wrapped in opposite directions. The insulation material (9) is a fleece material, and the pressure in the ring-shaped gap is between 10−3 and 10−1 mbar.
Claims8
A flexible line pipe comprising an inner corrugated metal tube, an outer corrugated metal tube located at some distance from the inner tube and a spacer as well as an insulation material between the inner and the outer metal tubes, whereby a pressure that is less than atmospheric pressure prevails in the ring-shaped gap between the tubes, wherein:
- said spacer comprises two cords (7, 8) made of fiber-reinforced plastic wrapped around said inner tube (4) in opposite directions of winding;
- said insulation material is a fleece material;
- and
- said pressure is between 10−3 and 10−1 mbar;
- and wherein the two cords have a round cross section.
Dependencies are inferred from the claim text.