REELING AND UNREELING AN INTERNALLY CLAD METAL PIPELINE

摘要

A method is disclosed for reeling a pipeline (6) having an inner corrosion-resistant metallic liner that is tightly fitted within the pipeline. To minimise or avoid wrinkling of the liner during the reeling or unreeling, a length of the pipeline is internally pressurised, by deploying a single sealing pig (41) within the pipeline near to the trailing end of the pipeline and applying pressurised fluid within the pipeline, and then the length of pipeline is reeled onto a storage reel (3). In the pressurising process, the length of the pipeline is filled with fluid at an elevated pressure within a range defined by a lower limit of 5 bar.