Method for sealedly joining a flanged coupling onto a pipeline

摘要

A method for sealedly joining a flanged coupling to a pipeline, comprising the successive steps of creating within the pipeline a sealed chamber in correspondence with the coupling to be joined, pumping water or another liquid into said chamber to very high pressure, and continuing said compression until the coupling is brought to its elastic deformation limit while the pipeline deforms plastically, and finally lowering the pressure within the chamber. <IMAGE>