Pressure Vessels: Internal & External Pressure Effects

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SUMMARY

The discussion focuses on the effects of internal and external pressures on pressure vessels, specifically analyzing a scenario with internal pressure of 3 bar and external pressure of 4 bar. It concludes that the resultant pressure is effectively 1 bar external, emphasizing that pressure vessels are typically designed for differential pressure. However, it highlights potential complexities regarding access hatches and seals, which may only be rated for positive internal pressures, indicating that design considerations must account for these factors.

PREREQUISITES
  • Understanding of pressure vessel design principles
  • Knowledge of differential pressure calculations
  • Familiarity with materials used in pressure vessel construction
  • Awareness of sealing mechanisms and their pressure ratings
NEXT STEPS
  • Research pressure vessel design codes such as ASME BPVC
  • Learn about differential pressure testing methods
  • Explore material selection criteria for pressure vessels
  • Investigate sealing technologies suitable for varying pressure conditions
USEFUL FOR

Engineers, pressure vessel designers, and safety inspectors involved in the design, analysis, and maintenance of pressure vessels.

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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