Production of CRA lined pipe made by the sink drawing (SD) method was investigated as a manufacturing method for North Sea pipelines. In the SD process, the carbon steel outer pipe (shell) is cold drawn over the unsupported corrosion resistant alloy (CRA) liner. SD offers an economic benefit over cladding and may better address loads encountered during installation and during the life cycle than lined pipe made by other processes. Tests were conducted to evaluate two key aspects of SD performance: (1) corrosion resistance of the SD internal liner to a sour production environment and (2) collapse or buckling of the liner due to bending, to thermal loading, and to line depressurization.
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