Pressure vessels can be classified into many categories according to different classification standards, mainly including the following:
Classification by pressure level:
Low-pressure vessels: The design pressure is between 0.1MPa and 1.6MPa, and they are often used to store and transport low-pressure gases or liquids at room temperature.
Medium-pressure vessels: The design pressure is between 1.6MPa and 10.0MPa, and they are used to store and transport media with certain dangers.
High-pressure vessels: The design pressure is between 10MPa and 100MPa, and they are used for the storage and transportation of high-pressure gases or high-temperature and high-pressure liquids.
Ultra-high-pressure vessels: The design pressure exceeds 100MPa, and they are mainly used in special fields, such as the synthesis of artificial diamonds and high-pressure physical experiments.
Classification by use and hazard:
First-class pressure vessels: mainly refer to low-pressure vessels, which are less dangerous.
Second-class pressure vessels: include medium-pressure vessels and some low-pressure vessels, which are moderately dangerous. Class III pressure vessels: including high-pressure vessels, some medium-pressure and low-pressure vessels, and mobile pressure vessels (such as railway tank cars), which are more dangerous.
Classification by role in the process:
Reaction pressure vessels: used to complete the physical and chemical reactions of the medium, such as reactors, polymerization kettles, etc.
Heat exchange pressure vessels: used to complete the heat exchange of the medium, such as heat exchangers, coolers, etc.
Separation pressure vessels: used to complete the fluid pressure balance buffer and gas purification separation of the medium, such as separators, filters, etc.
Storage pressure vessels: used to store and contain media such as gas, liquid, liquefied gas, such as storage tanks, buffer tanks, etc.
Other classification methods:
Classification by installation method: divided into fixed pressure vessels and mobile pressure vessels. Fixed pressure vessels have fixed installation and use locations, while mobile pressure vessels will be affected by internal medium shaking and external impact during use.
Classification by material: There are steel containers, non-ferrous metal containers and non-metallic containers.
Classification by pressure bearing method: There are internal pressure vessels and external pressure vessels.
Classification by design temperature: There are high temperature vessels, normal temperature vessels and low temperature vessels.
Classification by shape: There are spherical vessels, cylindrical vessels, conical vessels, etc.
