New definition of pressure vessels
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According to the latest catalog of special equipment, a pressure vessel is defined as a closed device used to hold gases or liquids and that is subjected to certain pressure. It includes fixed and mobile vessels whose maximum working pressure is 0.1 MPa (gauge pressure) or higher for gases and liquefied gases, and whose maximum working temperature is equal to or higher than their standard boiling point; such vessels also have a volume of 30 L or more and an inner diameter of 150 mm or more (for non-circular cross-sections, this refers to the largest geometric dimension of the cross-section). ”How should the volume here be understood? For example, there is a container currently used as an accident water tank; the medium inside is water, its volume is 10 cubic meters, and the pressure is greater than 0.1 Mpa. The gas space within this container is usually larger than 30 liters. Is such a container considered a pressure vessel?
I think all the conditions that need to be met have been satisfied
What about the temperature? It’s fine as long as the temperature is appropriate
For water storage containers, if the gas space is greater than 30 liters and the operating pressure meets the requirements, they should be classified as pressure vessels.
The gas space is already larger than 30L, and the operating pressure is also within the specified range; I think it should be classified as a pressure vessel
With a volume of 10 cubic units and a pressure greater than 0.1 Mpa, the gas space inside is usually larger than 30 L; therefore, this container is considered a pressure vessel...
If the maximum operating pressure is ≥100 degrees, it falls into this category; otherwise, it does not. This is just my personal opinion – I welcome everyone’s feedback
It is a pressure vessel: First, the pressure must be at least 0.1 MPa; secondly, there must be a gas phase and the volume must be greater than 30 L. These conditions are met, so it is a pressure vessel
Actually, I understand it this way: any container with a pressure of 0.1 MPa or higher is considered a pressure vessel, and as for whether it falls into a certain category, that is determined in accordance with the relevant regulations
Application scope of fixed pressure vessels: Applies to pressure vessels that meet the following conditions simultaneously: (1) Operating pressure greater than or equal to 0.1 MPa (Note 1-2)； (2) The product of working pressure and volume is greater than or equal to 2.5 MPa•L (Note 1-3) ； (3) The medium contained is a gas, a liquefied gas, or a liquid whose maximum operating temperature is higher than or equal to its standard boiling point (Note 1-4). Note 1-2: Operating pressure refers to the highest pressure (gauge pressure) that the top of a pressure vessel may reach under normal operating conditions. Notes 1-3: Volume refers to the geometric volume of a pressure vessel, that is, it is calculated based on the dimensions specified in the design drawings (without considering manufacturing tolerances) and rounded off. Generally, the volume of the components permanently attached inside the pressure vessel needs to be deducted. Notes 1–4: When the medium inside the container is a liquid whose maximum operating temperature is below its standard boiling point, this regulation also applies if the product of the volume of the gas space and the operating pressure is greater than or equal to 2.5 MPa•L.