Regarding the revision of the definition of pressure vessels in the \"Catalogue of Special Equipment 2015\"
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According to the latest \"Catalogue of Special Equipment 2015\", a pressure vessel is defined as a closed device used to contain gases or liquids and capable of withstanding certain pressures. 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 internal boundary)； Gas cylinders designed for gases, liquefied gases, and liquids with a standard boiling point of 60°C or lower, whose nominal working pressure is 0.2 MPa (gauge pressure) or higher, and whose product of pressure and volume is 1.0 MPa•L or higher ； Oxygen chamber. I don’t understand then – does a pressure vessel need to meet all the conditions listed above? Or is it something else? Previously, it was stated that a pressure vessel is a vessel that meets all of the following three conditions: 1. Operating pressure (PW) ≥ 0.1 MPa (excluding hydrostatic pressure). 2. The inner diameter (for non-circular cross-sections, the maximum dimension) is ≥0.15 M, and the volume V is ≥0.025 M3. 3. The medium contained is a gas, a liquefied gas, or a liquid whose maximum operating temperature is greater than or equal to its standard boiling point. All three conditions must be met; it’s getting more and more confusing now! ! I hope an expert can explain this to me; thank you so much!
There is no contradiction; it’s just that the volume has increased from 25L or more to 30L.
All three conditions must be met. There is no problem with the definition syntax.
There is no contradiction; the revised terms are clearer and more explicit. What exactly doesn’t the original poster understand?
Apart from the capacity increasing from 25L or more to 30L, nothing else has changed; it must be satisfied simultaneously!
I have a gentle question: is the medium here gas or liquid? Does steam count as well? . . .
4th floor: The definition of pressure vessels has been modified in the \"Catalogue of Special Equipment 2015\" – such phrasing is really hard to understand What specific conditions must be met in order for something to be considered a pressure vessel?
This post was last edited by zhangjuhua on 2016-1-12 at 16:56. The three requirements specified in the regulatory standards still apply; the only slight change is that the value of 25 has been increased to 30. As for gas cylinders, liquefied gases, and liquids with a standard boiling point of 60°C or lower, those whose nominal working pressure is greater than or equal to 0.2 MPa (gauge pressure) and whose product of pressure and volume is greater than or equal to 1.0 MPa•L； Oxygen chambers – it seems there are separate regulations for them
Atmospheric pressure is 0.01 MPa, so an atmospheric air storage tank is also a pressure vessel, right? It seems to contradict the first requirement!