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Member

Join Date: Jan 2010
Posts: 9

Depressurization of Vessel

02/22/2010 1:31 AM

Hi, Friends

We are planning to carry out the pressure test of our vessel for 66 ksc.

Volume of vessel is 36.5m3.

We want depressurization of vessel from 66 ksc to less than 40 ksc within 5 seconds.

I want your opinions for depressurization regarding plumbing sizes, valves sizes & type etc.

Thanks in advance.

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Guru

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#1

Re: Depressurization of Vessel

02/22/2010 10:37 AM

First of all what is a ksc?

What fluid is used for the pressure test? If it's water, or other liquid, and the release valve is any reasonable size, say => 1", the pressure will fall well within 5 seconds.

Cheers.........Codey

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Guru
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#4
In reply to #1

Re: Depressurization of Vessel

02/23/2010 7:14 AM

<...If it's water, or other liquid, and the release valve is any reasonable size, say => 1", the pressure will fall well within 5 seconds....>

GA. The original poster must use an incompressible fluid for the test.

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Guru

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#5
In reply to #4

Re: Depressurization of Vessel

02/23/2010 7:17 AM

Thanks PW

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Anonymous Poster
#2

Re: Depressurization of Vessel

02/22/2010 2:55 PM

have you considered what kind of temperature drop you will experience at the area of the discharge and the minimum design metal temperature of the vessel material? this needs to be investigated and weighed against the reason for such rapid depressurization.

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Power-User

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Location: Australia
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#3

Re: Depressurization of Vessel

02/22/2010 11:07 PM

Hi Sathe,

I'm assuming ksc is kg(force) per square centimetre. So 66 bar down to 40 bar.

What you're asking is basically a pressure releif calculation.

Without further details (as already mentioned) such as the process fluid, it is difficult to give more information.

I would suggest a google search for "Pressure Releif Calculations".

Kind Regards,

Anthony

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Member

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#6
In reply to #3

Re: Depressurization of Vessel

02/23/2010 10:45 PM

Thanks all of you.

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