An atmospheric expansion tank is a device that can regulate gas pressure. When gas is stored in an atmospheric expansion tank, the pressure inside the tank can be adjusted by the movement of the piston or diaphragm within the tank. When the external gas pressure increases, the piston or diaphragm inside the tank will automatically move inward, reducing the volume of the gas inside to maintain a constant pressure. Conversely, when the external gas pressure decreases, the piston or diaphragm inside the tank will move outward, increasing the volume of the gas inside to maintain a constant pressure.

Gas Storage Vessel (Storage Container) is a specialized device used for storing gases. It is typically made of steel or fiberglass, offering high strength and corrosion resistance. The interior of the vessel maintains a certain pressure and is capable of storing various gases, such as nitrogen. These vessels are widely used in industrial production, energy reserve, and transportation sectors.

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