Large pressure vessels

pressure vessel(Equipment that carries a certain pressure or contains flammable and explosive materials)

Pressure vessel (y ā l ì r ó ng q ì), English: pressure vessel, refers to a closed equipment that contains gas or liquid and carries a certain pressure. In order to implement scientific management and safety supervision more effectively, China's "Pressure Vessel Safety Supervision Regulations" classify pressure vessels into three categories based on work pressure, medium hazard, and their role in production.

And different regulations have been made for the design, manufacturing process, inspection items, content, and methods of each category of pressure vessels. The pressure vessel has implemented the import commodity safety and quality permit system, and goods without an import safety and quality permit certificate are not allowed to be imported. It should be classified according to TSG21-2016 "Safety Technical Supervision Regulations for Fixed Pressure Vessels", first divided into Group I and Group II media according to the medium, and then classified into Class I, Class II, and Class III according to pressure and volume. The so-called Class I, Class II, and Class III of the old capacity regulations are no longer applicable.

A pressure vessel is a sealed container that can withstand pressure. Pressure vessels have a wide range of applications and play an important role in many sectors such as industry, civilian use, military industry, as well as in many fields of scientific research. Among them, pressure vessels are most commonly used in the chemical and petrochemical industries, with pressure vessels used only in the petrochemical industry accounting for about 50% of the total number of pressure vessels. Pressure vessels are mainly used in the fields of chemical and petrochemical industries for processes such as heat transfer, mass transfer, and reaction, as well as for storing and transporting pressurized gases or liquefied gases; It is also widely used in other industrial and civilian fields, such as air compressors. All types of specialized compressors and auxiliary equipment for refrigeration compressors (coolers, buffers, oil-water separators, gas storage tanks, evaporators, liquid coolant storage tanks, etc.) are all pressure vessels.