3 replies to this topic

[rasprocess]

Hi 

 

I have a question: what is the exact pressure of blanketing nitrogen in a gasoline tank?

 

In a refinery N2 is usually produced at 7-8 barg and 0.5-1 bar pressure drop is expected.  But what is the exact pressure of N2 above the gasoline in tank?

 

And is this pressure different from the N2 pressure above jet fuel tank?

 

best regards

[Rodscott]

Rasprocess,

 

first thing you need to do is to use a search tool on this webpage. You will find a lot of things regarding this topic.

 

In advance, you need to use a slightly overpressure above the liquid phase, normally 20 - 100 mbar higher than product's vapor pressure considering the operating temperature or maximum operating temperature expected.
 

 

Hope this help!

 

Rodscott

Edited by Rodscott, 29 May 2013 - 05:41 AM.

[fallah]

Hi,

 

Vapor space of a nitrogen blanketed storage tank consists of a mixture of nitrogen and vapor of the HC has been stored inside the tank. In normal operation, the pressure of the nitrogen would be partial pressure of the nitrogen in gaseous mixture. Obviously, this pressure is lower than tank blanketing set point.

[proinwv]

As rodscott says, search the forum. There is a wealth of information on this subject.

 

For a general idea, I have seen pressures in the range of 1" to 5" w.c. most commonly. The capability of the tank is a critical parameter to be considered.