Questions about external pressure design and internal pressure verification
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The internal pressure of a piece of equipment is designed to be 0.5 and the external pressure is -0.1. The internal pressure test pressure is 0.625, and the external pressure test pressure is reasonable if the input test pressure is 0.625..
It is completely unreasonable. How can the external pressure be as big as -0.625? -0.1 is the maximum of full vacuum, unless the environment where the equipment is placed is pressurized.
There is no need to enter 0.625, the external pressure experimental value is calculated
As long as the equipment has been calibrated to an external pressure of 0.1. External pressure vessels cause instability failure, which is not easy to detect and can only be carried out with internal pressure. Therefore, the test of 0.625 internal pressure is already considered as a test of external pressure.