Pressure vessels, which are widely used in various industries, have different levels of hazards. In order to provide different technical requirements for vessels with different levels of hazards, classification of pressure vessels is necessary and supervision and administration should be carried out by category. The aim of this paper is to introduce a simple and rational classification method presented in the new version of Chinese Supervision Regulation on Safety Technology for Stationary Pressure Vessel, which specifies that the stationary pressure vessels should be classified according to the design pressure, volume, and fluid type. The classification methods of European Union and Australia are also described in this paper.

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