Pressurized tank / safety shower

[wittyish]

Greetings,

I'm looking for feedback on method.

We have a 400 gallon tank (160psi mwp)and a safety shower with a required pressure of 30 psi. There is 5 psi of pressure loss between the tank and shower. We use 2 air cylinders (80 ft^2 @ 2200 psi) to a regulator set at 35 psi to pressurize the tank and supply the shower for 15 minutes @ 25 GPM. (I am having a hard time finding the equations, but test data confirms)

Now if the new pressure loss is 40 psi; is it as simple as doubling the air cylinders to 4 x 80ft^2 @ 2200 psi and setting the regulator at 70 psi?

Best Regards,

 

[EnergyMix]

Welcome to Eng-tips. I'm not sure that this is really either a Boiler and Pressure Vessel Engineering question (or a storage tank question.) However, since you asked it here, I will answer it. I believe that this thread from 2006 may well provide you with the answers you need, if you read through the links and the referenced standards: thread378-167453. If it doesn't then the best thing to do, is to post a new question in forum378 and specify why you need the safety shower. Also specify why the pressure loss is increasing. The more information you provide, the better the answer you will get.

Thanks

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