| 摘要 |
<p>The present invention provides a strip (10) and a tubular article (74) formed form said strip (10) which may, for example, be used in the oil and gas industry for transporting fluids which may be volatile fluids or corrosive fluids and which may be at elevated temperatures and / or pressure. The strip (10) includes a plurality of combined step (joggle) and rib arrangements In the finished assembled article, the strip (10) is wound in helically self-overlapping relationship such as to allow corresponding step portions to sit one within the other. The step effectively provides the dual function of a joggle and a rib as known in the art and does so in a manner that reduces the forming stresses in the material and increases the strength of the final article.</p> |
