Method for manufacturing cathodic protected pipe profile utilized during construction of e.g. cooling agent pipeline, involves extruding press block, and forming pipe profile from press block using extruding method

摘要

The method involves extruding a press block (1) with an electrochemical ignoble outer sheath (1.1) and an electrochemical noble inner core (1.2), where the press block is molded in a hollow cylindrical manner. A pipe profile is formed from the press block using an extruding method. The press block is co-extruded from aluminum alloy, and the co-extruded press block is punched perpendicular to a cross sectional surface. A hydrostatic strand-press process is implemented in the pipe profile in a direct or indirect manner at press temperature below 600 degree Celsius.