Design pressure for jacketed vacuum vessels with internal pressure in the jacket
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As stated in the title, it is designed as a pressure vessel under external pressure; the design pressure is taken as the value specified for vacuum vessels without jackets, plus the design pressure inside the jacket. Moreover, its stability under the test pressure applied to the jacket must be verified. How should the first half of the sentence be understood? It would be best to explain it with a specific numerical example
My personal understanding is the pressure difference between the container and the jacket. The container pressure is 0.3 units of vacuum, while the jacket pressure is 0.8 MPa; thus the pressure difference is 0.03 + 0.8 = 0.83 MPa