The invention discloses a gas output pipeline of a liquid
natural gas storage tank. The gas output pipeline is horizontally arranged, the upper part of the cross section of the gas output pipeline isarc-shaped, and the lower portion of the cross section of the
fuel gas output pipeline is provided with a flow stabilizing portion gradually reduced in the direction away from the upper portion; and the gas output pipeline is used for conducting heat to the liquid
natural gas inside the gas output pipeline, the liquid
natural gas is heated and gasified to absorb heat, the temperature of the gas conveying pipeline is reduced, the air close to the outer surface of the gas output pipeline is used for conducting heat to the gas output pipeline, the density of the air is increased after the temperature of the air is reduced, the
cold air flows downwards along the surface of the flow stabilizing portion under the action of gravity, the vortex or turbulence generated by the
cold air under the bottom surface of the flow stabilizing portion is relatively small, so that the retention of
cold air under the bottom surface of the gas output pipeline can be reduced; and heat can be transferred to the
fuel gas output pipeline more quickly, so that
frost condensed on the surface of the
fuel gas output pipeline is reduced, and therefore the heat conduction of the hot air to the fuel gas output pipeline is accelerated, and a virtuous cycle is formed.