| 摘要 |
A method is disclosed for reeling or unreeling a pipeline having an inner corrosion-resistant metallic liner that is tightly fitted within the pipeline. To minimize or avoid wrinkling of the liner during the reeling or unreeling, a length of the pipeline is internally pressurized in a two-stage pressurizing process, and then the length of pipeline is reeled or unreeled, as the case may be. In the first stage of the pressurizing process, the length of the pipeline is filled with fluid at an elevated pressure, and in the second stage the fluid pressure is raised to a higher pressure, which may be 25 bars or more, absolute. |
