Abstract: Justification of gas supply system is given which prevents formation of crystalline hydrates in pressure controllers during operation of tank units with natural regasification of Liquefied Hydrocarbon Gas (LHG). Processes of heat exchange between gas supply system and ambiance are reviewed and their operating temperature conditions are determined. Prerequisites are formed to determine optimum thickness of thermal insulation of gas supply system elements which allows to ensure maintenance of superheat of vapor phase of liquefied hydrocarbon gas upstream pressure controller and avoid hydrate formation.