How giant flexitangs are emptied: Black gold flows like a river

This video demonstrates the industrial process of emptying a so-called flexitang (a flexible container liner) filled with a viscous, dark-colored liquid (presumably industrial oil, bitumen, or fuel oil). The process takes place in an open production or logistics area and involves a gantry crane, a forklift, and a worker. Step-by-Step Description of the Process Securing the Container: A 20-foot shipping container is suspended from the gantry crane's crossbar over a special receiving tank (an open tank) where the contents will be discharged. Ensuring the Tilt: To allow the liquid to drain more efficiently under gravity, the container is tilted using a crane—the rear portion is raised, and the front (with the doors open) is lowered. Monitoring and Adjusting the Drainage: A worker wearing a protective hat stands on a wooden pallet lifted by a forklift to the level of the container's doors. Using a long metal pole, he presses on the flexitang shell, forcing the remaining viscous liquid toward the drain hole. Draining into the tank: A thick, black mass flows in a continuous, wide stream from the flexible liner directly into the tank below, which already contains a large volume of the same substance. Completion of the process: As the flexitang empties, it compresses and loses its shape. In the final seconds of the video, the flow almost runs dry, and the container is smoothly moved to the side by a crane. Interesting facts about this technology What is flexitang? It is a huge, multi-layer polymer bag (typically with a capacity of 14,000 to 24,000 liters) that transforms a standard dry shipping container into a fully functional tank for transporting bulk cargo. Cost benefits: Using flexitangs is significantly cheaper than transporting in specialized tank containers or barrels. After use, the liner itself is simply disposed of, eliminating the need to wash the container before the return trip. Transportation Safety: To prevent flexitang from damaging the container walls during ship motion or train braking, a rigid barrier system (metal beams) is installed at the doors. In the video, this was removed just before the unloading process began. Temperature Factor: Judging by the brisk flow of this dark mass, the liquid either has a relatively low viscosity in the current weather, or a "steam jacket" (heating pad) was installed inside the flexitang before unloading to liquefy the thick substance.