Internal and external pressures

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The discussion focuses on understanding the combined effects of external hydrostatic pressure and internal pressure on the stresses in submerged pipelines, specifically hoop, longitudinal, and radial stresses. Participants note that many existing equations address either internal or external pressure but not both together. It is emphasized that the pressure difference at any given point is crucial for assessing stress. The need for a comprehensive approach that considers both pressures simultaneously is highlighted. Overall, the conversation seeks clarity on how to accurately calculate pipeline stresses under these conditions.
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Hello,

Could someone please if possible explain the affects of external pressure (hydrostatic) in combination with internal pressure on a submerged pipelines stresses (hoop, longitudinal, radial) Most equations I have came across only seem to consider 1 or the other and not both simultaneously?

Thanks,
 
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DeanE123 said:
Hello,

Could someone please if possible explain the affects of external pressure (hydrostatic) in combination with internal pressure on a submerged pipelines stresses (hoop, longitudinal, radial) Most equations I have came across only seem to consider 1 or the other and not both simultaneously?

Thanks,
I would think that at any given point what matters is the pressure difference.
 

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