NOVELTY - A heat exchanger (30) receives a compressed gas stream to produce a cooled gas stream which is passed through a pipe (54) immersed in a cold recovery material (52), to produce liquefied gas. The pressure of the liquefied gas is reduced to a storage pressure by a primary expansion valve (60). The liquefied gas expands in the pipe, to cool the cold recovery material, when releasing liquefied gas from a storage tank (70).    USE - System for storing gases such as liquefied natural gas (LNG), methane gas, oxygen, nitrogen, ethane, hydrogen, helium, at low temperature using insulated cold recovery system (claimed) used in liquefaction system (claimed) of gas, used for industrial, commercial, vehicles, or personal applications.    ADVANTAGE - Enables to maintain heat balance in the each cold recovery vessel so that the system is ready for cooling gas stream. Reduces operating cost required for storing the gases.    DETAILED DESCRIPTION - The system has cold recovery vessels (50) provided with cold recovery material of different physical properties. The cold recovery material is selected based on average operating temperatures of gas exiting the cold recovery vessel, heat transfer properties. The liquefied gas from the cold recovery vessel, is delivered to the storage tank. The primary and secondary expansion valves are opened, when the pressure of the cooled gas stream in the pipe reaches initial pressure of gas stream and when pressure of the liquefied gas is set lower than service pressure of the cooled gas stream. The gas cooled are oxygen, nitrogen, ethane, methane, hydrogen, helium, or any pure gas.    INDEPENDENT CLAIMS are also included for the following:    (1) liquefaction system for gases, which has an insulated cold recovery system provided with a turbine to reduce pressure of cooled gas during liquefaction. The primary and secondary expansion valves are controlled by an automatic valve control device;    (2) gas storage method which involves compressing gas in the compressor (20) to form the compressed gas. The compressed gas is passed through the heat exchanger to form a cooled gas stream which is cooled in the insulated cold recovery system. The liquefied gas is cooled, after injecting cryogenic liquid such as helium, nitrogen, argon, refrigerants such as ammonia, freon, carbon dioxide into the cold recovery vessel;    (3) insulated cold recovery system.    DESCRIPTION OF DRAWING(S) - The figure shows a flow process diagram of storing gas at low temperature.    compressor (20)    heat exchanger (30)    cold recovery vessel (50)    old recovery material (52)    pipe (54)    expansion valve (60)    storage tank (70)