LINING PIPES

摘要

A method for forming an aperture in a polymeric liner which is in contact with a thermally conductive container wall (1) such that the aperture is in register with an opening (2) defined in the container wall (1). The liner is heated such that a portion (6) of the liner which bridges the opening is thermally degraded to an extent that it is effectively destroyed. Portions of the liner in contact with the container are not thermally degraded as they are cooled by contact with the container.