And this is based on starting with an atmospheric pressure of 14.7psi that's counted as zero, or used as a baseline here. But a pressure vessel at 33 ft depth seawater with an internal pressure of 10psi, however unlikely, would experience a pressure of about 4.7 + 14.7 psi.
Whether it's good practice or not, I try to make myself use absolute pressure, instead of gauge, so would say the standard pressure at 33fsw is 29.4psi. And then structurally would subtract out the internal pressure. Yes?
On Sep 11, 2011 2:45 PM, "Scott Waters" <
muddywatersfarm@hotmail.com> wrote:
>
> Thanks guys. I appriciate it.
> -Scott Waters
>
>
>> Date: Sun, 11 Sep 2011 13:22:44 -0500
>> Subject: Re: [PSUBS-MAILIST] depth to psi
>> From:
gregc02@gmail.com>> To:
personal_submersibles@psubs.org
>>
>> Correct; with minor corrections for fresh/salt water (and salinity
>> corrections in salt), and temperature.
>>
>> For basic figuring just figure 0.45 psi per foot of depth.
>>
>> Greg
>>
>>
>>
>> On Sun, Sep 11, 2011 at 1:04 PM, Scott Waters
>> <
muddywatersfarm@hotmail.com> wrote:
>> > Just wanted someone to double check me. PSI to Depth is calculated by
>> > Depth / 33 * 14.696 correct?
>> >
>> > so 33 feet would be 14.696 psi
>> > 66 feet would be 29.392 psi
>> > 100 feet would be 44.533 psi
>> > etc.
>> >
>> > Thanks,
>> > Scott Waters
>> >
>>
>>
>>
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>