It refers to a closed device that contains a gas or liquid and carries a certain pressure.
There are many classification methods for pressure vessels. From the perspective of use, manufacturing and supervision, there are several types.
(1) According to the level of pressure, it is divided into low pressure vessels, medium pressure vessels, high pressure vessels and ultra high pressure vessels.
(2) According to the containing medium: non-flammable, non-toxic; flammable or toxic; highly toxic.
(3) According to different roles in the process:
①Reaction container: A container used to complete the physical and chemical reactions of the medium.
② Heat exchange container: a container used to complete the heat exchange of the medium.
③ Separation container: a container used to complete the mass exchange of media, gas purification, solid, liquid, and gas separation.
④ Storage and transportation container: It is a container used to hold liquid or gaseous materials, storage and transportation media, or to balance the buffer pressure.
A pressure vessel is a closed vessel capable of withstanding pressure. Pressure vessels are extremely versatile, and they have an important status and role in many sectors such as industry, civil, military, and scientific research. Among them, the most used in the chemical industry and petrochemical industry, pressure vessels used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. Pressure vessels are used in the leading cities of chemical industry and petrochemical industry. They are mainly used for heat transfer, mass transfer, reaction and other processes, as well as storage and transportation of pressured gas or liquefied gas. compressor. Various special compressors and auxiliary equipment of refrigeration compressors (coolers, buffers, oil-water separators, gas storage tanks, evaporators, liquid coolant storage tanks, etc.) are pressure vessels.