Pressure Vessels: Internal & External Pressure Effects

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Discussion Overview

The discussion revolves around the effects of internal and external pressures on pressure vessels, specifically whether a resultant pressure of 1 bar external can be considered equivalent to a scenario with only 1 bar external pressure, assuming constant factors such as thickness and material.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant questions if the resultant pressure can be considered as 1 bar external when a pressure vessel is subjected to 3 bar internal and 4 bar external pressures.
  • Another participant suggests that the approach seems acceptable.
  • A third participant notes that pressure vessels are typically designed for differential pressure but introduces a complexity regarding access hatches and seals, which may only be designed for positive internal pressures.

Areas of Agreement / Disagreement

Participants do not reach a consensus; while some agree with the initial proposition, others introduce complexities that suggest differing views on the implications of internal and external pressures.

Contextual Notes

There are unresolved considerations regarding the design of access hatches and seals in relation to internal pressures, which may affect the overall assessment of the pressure vessel's performance under the stated conditions.

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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