What are the common classification methods for pressure vessels?

Pressure level: Low pressure L, Medium pressure M, High pressure H, Ultra-high pressure U. By purpose: reaction, heat exchange, separation, storage. By usage: Fixed, Mobile.

1. Pressure vessels are classified into four pressure grades based on their design pressure (p), as follows: Low-pressure (code L) vessels: 0.1 MPa ≤ p < 1.6 MPa; Medium-pressure (code M) vessels: 1.6 MPa ≤ p < 10.0 MPa; High-pressure (code H) vessels: 10 MPa ≤ p < 100 MPa; Ultra-high-pressure (code U) vessels: p ≥ 100 MPa. 2. Classified by the role of the container in production: Reaction pressure vessels (code R): Used to carry out physical and chemical reactions of substances. Heat exchange pressure vessel (code E): Used to facilitate heat exchange of media. Separation pressure vessel (code S): Used for achieving fluid pressure balance and buffering, as well as gas purification and separation. Storage pressure vessels (code C, with spherical tanks coded as B): used for storing gases, liquids, liquefied gases, and other such media. 3. Classified into three categories according to safety technology supervision and management; the first category is pressure vessels ； Class II pressure vessels ； Third category of pressure vessels. 4. By manufacturing method: it can be classified into single-layer, forged-welded, multi-layer wrapped, tape-wound, plate-wound, heat-fitted, seamless containers, etc. 5. Classified by material: there are steel containers, non-ferrous metal containers, and non-metallic containers. 6. Classification by wall thickness: They can be divided into thin-walled containers and thick-walled containers. Containers with a ratio of outer diameter to inner diameter of 1.2 or less are considered thin-walled containers ； Those greater than 1.2 are considered thick-walled containers. 7. Classification by design temperature: High-temperature vessels: t≧450℃ ； Room temperature container: -20°C < t

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Classified by pressure: vacuum, atmospheric pressure, low pressure, medium pressure, high pressure. . . By material: carbon steel, stainless steel, duplex steel, titanium steel. . . By purpose: storage tanks, heat exchangers, towers. . . Classified by temperature: low temperature, normal temperature, high temperature. Classified by movement type: fixed, mobile