[PSUBS-MAILIST] K3000 spherical shell calculations

[swaters]

Sean,
When you are talking about boyancy of the sphere, is the 1152m the design depth or crush depth. If it is the design depth, then that boyancy vs shell thickness in ASME 516 gr 70 is perfect! If not then might have to do some more thinking
Thanks,
Scott Waters




Sent from my U.S. Cellular© Smartphone"Sean T. Stevenson" <cast55 at telus.net> wrote:Further to this discussion, additional safety factor or design crush depth beyond the ABS maximum allowable working pressure may be a moot point in this example, as the payload capacity (net buoyancy) of the shell in question (A516 grade 70, 6' inner diameter) becomes negatively buoyant at only 1152 m working depth, meaning that if you design for deeper than that, the shell becomes heavy enough that you need supplemental buoyancy to stay afloat.  With HY-80, the situation improves significantly, extending depth to 2347 m before going negative.





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