Process for manufacturing a flexible tubular conduit having a jacket made of crosslinked polyethylene

A process for manufacturing a flexible tubular conduit having an internal impervious jacket made of polyolefin and at least one armoring layer, wherein said process comprises crosslinking said internal jacket by hydrolysis reaction by:

• winding said flexible tubular conduit on a storage support;
• connecting two ends of said flexible tubular conduit to a circuit including pump means for circulating a water containing fluid in said circuit, heating means for heating said water containing fluid and control means for controlling said heating means and said pump means;
• actuating said pump means and said heating means for filling said flexible tubular conduit with said water containing fluid and circulating said fluid from an inlet end of said flexible tubular conduit towards an outlet end;
• controlling said pump means and said heating means to maintain, during a determined time necessary to obtain a desired level of crosslinking of said internal jacket, temperatures of said water containing fluid at said inlet end and outlet end of said flexible tubular conduit respectively under imposed maximum and minimum values.