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Shipmates,
Please let me repeat what the archives are replete with. Propane tanks are built to withstand intenal pressures. They are not built to withstand external pressures. So their published (internal) pressure ratings have absolutely nothing to do with their external pressure ratings.
It would probably be a good educational exercise for one of the engineers in the group to run the numbers on the internal and external pressure limits of a standard propane tank, to show how much lower the external ratings are than the internal ratings. Will anyone volunteer for the task?
Doug Farrow
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