System for the transfer and gravitational drainage of a gas in liquid form

A transfer system for transferring liquid-form gas between two liquid-form gas units, comprising a main pipe configured to transfer the liquid-form gas from a source tank of a liquid-form gas source unit to a receiving tank of a liquid-form gas receiving unit, said main pipe comprising at least a first portion and a flexible second portion, the transfer system comprising an articulated support device for supporting the main pipe, the first portion being secured to the articulated support device and configured to withdraw the liquid-form gas contained in the source tank, wherein the transfer system comprises at least one return pipe configured to convey the liquid-form gas present in the main pipe toward the source tank, the transfer system for transferring liquid-form gas being configured to drain the liquid-form gas present in the main pipe under gravity toward the source tank via the return pipe.