(1) the maximum working pressure is greater than or equal to 0.1MPa (excluding liquid column pressure).
(2) the inner diameter (non-circular cross-section refers to the maximum size of the section) is greater than or equal to 0.15m, and the volume is greater than or equal to 0.025m * 3.
(3) the medium is a gas, liquefied gases, or liquids with a maximum operating temperature equal to the standard boiling point.
Pressure vessels according to the design pressure can be divided into low-pressure vessels (0.1MPa ≤ P < 1.6MPa), medium-pressure vessels (1.6MPa ≤ P < 10.0MPa), high-pressure vessels (10.0MPa ≤ P < 100MPa), ultra-high-pressure vessels (P ≥ 100MPa).
The third category of pressure vessels in a wider range, listed a few for your reference.
(1) the degree of toxicity for extreme and highly hazardous medium of medium pressure vessels.
(2) flammable or toxicity degree of medium-hazardous media, and pV product is greater than 10MPa? m * 3 medium-pressure storage vessel.
(3) flammable or toxicity degree of medium-hazardous media, and pV product greater than or equal to 0.5MPa? m * 3 medium-pressure reaction vessel.
(4) The degree of toxicity is extremely or highly hazardous media, and the pV product is greater than 0.2MPa? m*3 low-pressure container.
Non-standard equipment can be manufactured by any enterprise, without the need to accept the supervision and inspection of the Special Inspection Institute, however, can be exploded is definitely not non-standard equipment. Human life is at stake, even the teacher of the class is responsible (previously reported), if it is a manufacturing problem, how can the manufacturing plant is not responsible.