Is a negative-pressure container with a vacuum level of 0.09 MPa considered a pressure vessel?
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As the title suggests, is an evaporator operating at a vacuum level of 0.09 MPa considered a pressure vessel? Speaking of the three conditions for pressure vessels, their operating pressure is below 0.1 MPa; however, the GB150 standard for pressure vessels specifies that vessels with a vacuum level below 0.02 MPa are not included in this category.
It is not a container subject to inspection under the Fixed Volume Regulations; it should be a pressure vessel governed by GB150
Our evaporator is designed for a pressure range of -0.1 to 0.4 MPa, with an operating pressure of around -0.09 MPa. Should this be defined as a pressure vessel? The internal volume is definitely greater than 25L, and the operating temperature is also above the boiling point under standard conditions
The vacuum degree of 0.09 MPa is greater than that of 0.02 MPa, so it falls within the range specified by GB/T150
It belongs to pressure vessels that are not classified, and is not subject to the regulations on fixed-pressure vessels; however, it must comply with GB150
This post was last edited by cold19860310 on 2019-5-29 at 16:38. To be applicable to GB150 \"Pressure Vessels\", three conditions must be met: 1. Pressure, ≥0.1MPa and ≤35MPa, with a vacuum level of ≥0.02MPa； 2. The temperature ranges from -269°C to 900°C ； 3. The structural design shall comply with the relevant provisions of GB 150.2–GB 150.4; for specially designed pressure vessels as well as those made of aluminum, titanium, copper, nickel and nickel alloys, or zirconium, it is also necessary to meet a series of specifications specific to containers made of such materials. All three are essential. A vacuum degree of 0.09 MPa meets the pressure requirements for pressure vessels; however, to determine whether it complies with the GB 150 standard, other two factors also need to be considered – a judgment cannot be made based on just one condition. The classification of pressure vessels is mainly based on the properties of the medium, pressure, and inner diameter. One must be rigorous in academic work!
Negative pressure does not apply; what is experienced is external pressure, and in the event of damage, it acts inward, so there is no risk of explosion. Moreover, the large capacity specification requires a pressure of 0.10 MPa. GB/T150-2011 is only a recommended standard; there is no such thing as whether it is mandatory or not. The parts cited by regulations must be enforced.
Not regulated by fixed capacity rules; can be designed at 150