A METHOD OF SEALING A PIPELINE

摘要

The method comprises introducing into a pipeline in a gas pressurised system a sealing means comprising first and second sealing members (10, 11) that are spaced apart but connected to each other and are adapted to block and seal the bore of the pipeline. The space (17) between the sealing members is pressurised with inert gas and the pressure in the space is monitored to check for leakage or failure of the seal.