| 摘要 |
Arrangement for deepwater pipelines (2), wherein an internal thick-walled pipeline (6) comprises an outer mantel layer providing buoyancy and/or insulation for said deepwater pipelines (2), said mantel layer comprising lightweight concrete thereby forming a lightweight concrete mantel layer (5), said lightweight mantel layer (5) being covered by an external thin walled tube or skin (7), said external thin walled tube or skin (7) reinforcing said lightweight concrete mantel layer (5) and keeping said lightweight concrete mantel layer (5) dry.
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