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 repair or reinforcement of a pipeline, the method comprising:

• pulling the liner assembly into position in the pipeline, the liner assembly including an outer tubular liner and an inner inflatable bladder positioned longitudinally within the tubular liner, 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 into the pipeline, while maintaining the liner assembly in an inflated condition;
• measuring a flow rate and a temperature of the fluid entering the bladder;
• calculating a time period sufficient for the tubular liner to cure based on:
• an amount of total heat required for curing, based on dimensional information of the liner, and
• the measured flow rate and the measured temperature of the fluid;
• and
• maintaining the liner assembly in an inflated condition for the time period sufficient for the tubular liner to cure.