Why do pressure vessels need to have high corrosion resistance

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The petrochemical industry contains many flammable and explosive substances, which can easily catch fire and lead to accidents such as explosions. Pressure vessels store energy within them while in use, and should such vessels be damaged, the stored energy will be released in an extremely short time, resulting in tremendous destructive power. Therefore, pressure vessels used in the chemical industry must have high stability to ensure safety and reliability during use. The materials used in chemical production are often highly corrosive and toxic, and they can cause corrosion to ordinary materials. Therefore, the pressure vessels used in such applications should be manufactured from materials with high corrosion resistance, which helps to reduce the corrosive effects of the substances contained within the vessels, thereby enhancing safety and extending their service life. The first category of pressure vessels in Dalian are reaction pressure vessels, which are designed to carry out reactions inside the vessel. Common examples of such vessels include reactors, decomposition kettles, decomposition towers, synthesis towers, etc. There are also shift furnaces, cooking kettles, steam balls, gas generators, and other vessels used for reactions under different pressures ； Typically, pressure vessels in Shanghai are filled with a certain medium, and specific temperatures and pressures are used depending on production requirements and the properties of the medium; relevant information is recorded during the registration process. Therefore, if the conditions under which pressure vessels are used in Shanghai change, including the medium loaded, the temperature and pressure at which they are used, and their purpose, it is necessary to bring the design documents and approval papers related to these changes, along with other relevant documents, to the registration authority to go through the procedures for changing their usage conditions. Pressure vessels are those used for heat exchange; they are primarily designed to facilitate the transfer of heat between different media. Examples include shell-and-tube waste heat boilers, heat exchangers, coolers, condensers, etc. In many manufacturing workshops, equipment such as heaters, sterilization tanks, dyeing machines, steaming and frying pots, preheating tanks, steam evaporation units, and electric steam generators can also be found.