A pressure vessel is a sealed device capable of withstanding internal or external pressure, with a pressure range of 1.6MPa to 10MPa. It is widely used in industries such as chemical, petroleum, energy, and food processing. Its primary function is to store or transport gases and liquids. It is usually made of steel and has characteristics such as high-temperature resistance and corrosion resistance. The design and manufacturing of pressure vessels must comply with strict safety standards and regulations.