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Description :

　　according topressure vesselPressure vessels are classified into Class I, Class II, and Class III based on their volume, storage medium, and pressure rating.

　　Firstly, let's talk about the scope of application of pressure vessels:

　　1. Work pressure greater than or equal to 0.1MPa;

　　2. Container with an inner diameter greater than or equal to 0.03m3 (non-circular cross-section refers to the geometric dimensions of the inner boundary of the cross-section) greater than or equal to 150mm;

　　3. The medium used is gas, liquefied gas, and liquid with a working temperature higher than or equal to its standard boiling point.

　　Next is the grouping of pressure vessel media:

　　Chemical media with extreme or highly hazardous toxicity, explosive media, and liquefied gases;

　　The second group of media refers to media other than the group. Next is the classification of pressure vessel pressure levels: low pressure, 0.1MPa ≤ p<; 1.6 MPa； Medium pressure, 1.6 MPa ≤ p<; 10.0 MPa； High pressure, 1.6 MPa ≤ p<; 100.0 MPa

　　With the above concept, let's talk about the classification method of pressure vessels. The classification should be based on the characteristics of the medium, and the classification chart should be selected according to the following requirements. Then, based on the design pressure p (unit MPa) and volume V (unit m3), coordinate points should be marked to determine the classification of pressure vessels: the group medium is shown in Figure A-1; The second group of media is shown in Figure A-2.

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