Method of installing liner assembly for pipeline repair or reinforcement, and liner assembly and steam generator for same

A method of installing a liner assembly for pipeline repair or reinforcement, the method comprising:

• pulling a prepared liner assembly into position in the pipeline, the liner assembly including an outer tubular liner, an inner inflatable bladder positioned longitudinally within the tubular liner, and a pressure relief valve, the tubular liner being wetted with a curable compound;
• introducing fluid into the inflatable bladder so that the inflatable bladder expands to bring the tubular liner into firm contact with an interior surface of the pipeline;
• flowing the fluid continuously through the bladder and discharging the fluid through the pressure relief valve into the pipeline, while maintaining the liner assembly in an inflated condition for a time period sufficient for the tubular liner to cure;
• and
• deflating the inflatable bladder and retrieving at least a portion of the liner assembly from the pipeline,
• wherein the pulling comprises pulling the prepared liner assembly by a cable attached to the pressure relief valve.