Pressure Vessels: Internal & External Pressure Effects

AI Thread Summary
When a pressure vessel experiences internal pressure of 3 bar and external pressure of 4 bar, the resultant pressure is effectively 1 bar external. Both scenarios, with 3 bar internal and 4 bar external versus only 1 bar external, can yield similar results if all other factors like thickness and material are constant. However, complexities arise due to the design of access hatches and seals, which may only be rated for positive internal pressures. Therefore, while the differential pressure is a key consideration, the design specifics of the vessel components must also be taken into account. Understanding these factors is crucial for safe pressure vessel operation.
lingesh
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When a pressure vessel is subjected to internal pressure of 3 bar and external pressure of 4 bar..Is it right to say resultant pressure is 1 bar external? Does both cases (3 bar int& 4 bar ext,only 1 bar ext) produce the same result considering all other factors like thickness,material etc constant?
 
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You are probably correct. A pressure vessel is usually designed for a differential pressure.
But there may be a complexity. The access hatches and seals in a pressure vessel may be designed to work for positive internal pressures only.
 
thanks..
 
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