Help needed: design pressure for vacuum equipment
Thread Content
For a vacuum container with a jacket, having a vacuum level of 6x10-3 Pa and a water pressure in the jacket of 0.3 Mpa, what is the design pressure when using SW6 for calculations? Can -0.4 Mpa be used?
-0.4 is the calculated pressure, and the inner cylinder can be designed for a pressure of -0.1.
So it’s the internal cylinder pressure of -0.1 Mpa plus the water pressure in the jacket of 0.3 Mpa; the design pressure is set at -0.4 Mpa, right?
Upon closer inspection, the calculated pressure is -0.4, while the design pressure is -0.1.
The design pressure for the inner cylinder is set at -0.1 Mpa; when using SW6 for calculations, the pressure used is -0.4 Mpa......
No, it can only be set to -0.1.
There should be no input for the calculated pressure value in SW6; only the design pressure value is required as input.
The calculated pressure for SW6 is determined based on the combined effect of various loads, without the need for manual input. You can generate a calculation sheet and take a look to find out.
What should be considered at this time is the differential pressure between the inside and outside
The original poster can take a look at the provisions in Table 4.0.1 of HG/T20580-2011; after reading it, it should become clear. The key is to understand the relationship between the design pressure and the calculated pressure