Nitrogen blanket on high sulfur gasoline-external floating roof tank
Nitrogen blanket on high sulfur gasoline-external floating roof tank
(OP)
Hi, we have a nitrogen blanket on an external floating roof tank with sour gasoline in it. it has to go back to refinery for processing. our maintainence wants to do some work on it and wnat to shut the nitrogen off for about an hour . the main reason we are blanketing this is to avoid formation of gums. would shuting the nitrogen off for a short time hurt the quality of the product in this static tank.
any help will be appreciated,
thank you
any help will be appreciated,
thank you





RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank
RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank
How do you N2 blanket a tank with a floating roof?
Does not "floating roof" mean that the roof is open above and in direct contact with the gasoline below? Put nitrogen on top of the roof and it is slightly lighter than air so it's gone. Put it below the roof and the bubbles will either blow out around the edge seals, or lift the roof. The N2 leaking from under the floating roof would carry a lot of vapors with it and INCREASE the fire hazard.
'splain to me where my concept has failed. THis is how I learn.
RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank
RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank
Thanks again,
JC
RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank
The problem seems to be with the original post, kirnsi states: "we have a nitrogen blanket on an external floating roof tank"... which, I do not think is possible.
The terms "Internal Floating Roof" and "External Floating Roof" tanks are very specific. IFRs can be nitrogen blanketed, EFRs, as I understand, cannot
h
http://www.hghouston.com/float.html
http://www.cbi.com/about/articles/PNG_article.pdf
Addtionally, this month's issue of "Hydrocarbon Processing" contains an excellent article on tank roofs and selection criteria.
My opinion only
-MJC
RE: Nitrogen blanket on high sulfur gasoline-external floating roof tank