Which country has the best pressure vessel design

The standards of various countries are not the same, and they are often not interoperable, and they are generally used for pressure vessels in which country, and they are controlled according to the standards of which country, and they cannot be simply judged whether they are good or not. For example, no matter how good the design of foreign pressure vessels is, they are designed according to foreign standards, and if they are used in China, they must meet Chinese standards. Then it makes no difference.

The national standards of the United States and China are all copied from the American pressure vessel standards.

According to the principle of action in the production process, the container is divided into reaction pressure vessel, heat exchange pressure vessel, separation pressure vessel, and storage pressure vessel. The specific division is as follows:

1. Reaction pressure vessel (code R).

It is mainly used to complete the pressure vessel of the physical and chemical reaction of the medium, such as reactor, reaction kettle, decomposition pot, vulcanization tank, decomposition tower, polymerization kettle, autoclave, ultra-high pressure kettle, synthesis tower, transformation furnace, cooking pot, steaming ball, autoclave, gas generator, etc.

2. Heat exchange pressure vessel (code E).

It is mainly used to complete the heat exchange of the medium pressure vessels, such as shell-and-tube heat recovery boilers, heat exchangers, coolers, condensers, heaters, sterilizers, dyers, drying cylinders, steaming woks, preheating pots, solvent preheaters, steamers, evaporators, electric steam generators, gas generator furnace water jackets, etc.

3. Separation pressure vessel (code S).

It is mainly used to complete the fluid pressure balance buffering and gas purification separation of the medium, such as separators, filters, oil collectors, buffers, scrubbers, absorption towers, copper washing towers, drying towers, stripping towers, sub-cylinders, deaerators, etc.

4. Storage pressure vessel (code C, of which spherical tank code B).

It is mainly used for storing and containing gases, liquids, liquefied gases and other media, such as various types of storage tanks.

There are many classification methods for pressure vessels, and there are the following classifications from the perspective of use, manufacturing and supervision. (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, it is divided into: non-flammable and non-toxic; flammable or toxic; Highly toxic. (3) According to the different roles in the process, it is divided into:

Reaction vessel: a vessel used to complete the physical and chemical reaction of the medium. Heat exchanger vessel:

A container used to complete the heat exchange of the medium. Separation vessel: a vessel used to complete the mass exchange of media, gas purification, and solid, liquid and gas separation.

Storage and transportation container: a container used to hold liquid or gaseous materials, storage and transportation medium, or to balance and buffer the pressure. (4) In order to more effectively implement scientific management and safety supervision and inspection, China's "Pressure Vessel Safety Supervision Regulations" divides pressure vessels into three categories according to the working pressure, medium hazard and their role in production.

And each type of pressure vessel in the design, manufacturing process, as well as inspection items, content and methods have made different provisions. The pressure vessel has implemented the safety and quality licensing system for imported goods, and the goods that have not obtained the import safety and quality license are not allowed to be imported. 1.

The third class of pressure vessels, with one of the following conditions, is the third class of pressure vessels:

high-pressure vessels; Medium-pressure vessels (only for extremely and highly hazardous media);

Medium-pressure storage container (only for flammable or moderately hazardous media, and the PV product is greater than or equal to 10MPa·m3);

Medium-pressure reaction vessel (only for flammable or moderately hazardous media with a degree of toxicity and a PV product greater than or equal to;

low-pressure vessels (only for extremely and highly hazardous media with a degree of toxicity and a product greater than or equal to);

high-pressure, medium-pressure shell-and-tube heat recovery boilers;

medium-pressure glass-lined pressure vessels;

Pressure vessels made of materials with a high strength level (referring to the lower limit of the specified value of tensile strength in the corresponding standard greater than or equal to 540MPa);

Mobile pressure vessels, including railway tank cars (medium is liquefied gas, cryogenic liquid), tank cars [liquefied gas transport (semi-trailer) car, cryogenic liquid transport (semi-trailer) car, permanent gas transport (semi-trailer) car] and tank containers (medium is liquefied gas, cryogenic liquid), etc.;

spherical storage tank (volume greater than or equal to 50m3); Cryogenic liquid storage containers (volume greater than 5 m3).

Cryogenic liquid storage containers (volume greater than 5 m3).

2.The second class of pressure vessels, with one of the following conditions, is the second type of pressure vessels:

medium-pressure vessels; low-pressure vessels (only for extremely and highly hazardous media);

Low-pressure reaction vessels and low-pressure storage vessels (only flammable media or moderately hazardous media with a toxic degree);

low-pressure shell-and-tube heat recovery boiler;

Low-pressure glass-lined pressure vessels.

3.Class I pressure vessels, low-pressure vessels other than the above provisions are Class I pressure vessels.