Oil tank roof on legs

[iCe]

All crude oil tanks have to be floating roof style tanks. In English that means that the roof of the tank floats on top of the liquid. There are internal seals that keep the roof from sinking and also contain VOC (volatile organic compounds) emissions which is the point of the floating roof to begin with. There are two types of floating roof tanks- internal floating roof where there is a roof over the floating roof and external floating roof where the top of the tank is the floating roof. You can tell this type of tank by the ladder that is usually visible near the top of the tank. By looking at the angle of the ladder you can make a rough guess about how high the roof is and therefore how full the tank is. Every now and then the owner / operator of the tank has to set the roof down on it's legs, clean, and inspect the tank.

This is an iPhone shot of a cleaned 80,000 Bbl tank with the roof sitting on it's legs. If you look closely you can see that the roof has spun a little from when it was installed.

[smoothassilk]

I've heard some of my friends that work in the business talk about these floating roofs. Never actually saw one or had it really explained.
I'm I looking at this correctly?
So in the picture I'm looking at the bottom of a clean tank and the legs holding up the roof? If so, do the legs stay suspended in the oil or substance of the tank?

Mark

[iCe]

Originally Posted by smoothassilk

I've heard some of my friends that work in the business talk about these floating roofs. Never actually saw one or had it really explained.
I'm I looking at this correctly?
So in the picture I'm looking at the bottom of a clean tank and the legs holding up the roof? If so, do the legs stay suspended in the oil or substance of the tank?

Mark

That's correct. They can set the legs to allow the roof to be lower or higher but they remain suspended

[smoothassilk]

Thats neat, thanks for sharing. You must have a very interesting job. Have a great day.
Mark

[Ahh!]

Tanks for the explanation! Always wondered.

[iCe]

Originally Posted by smoothassilk

Thats neat, thanks for sharing. You must have a very interesting job. Have a great day.
Mark

I design and program the control systems and graphic interfaces for gas plants, compressor stations, and pump stations (and whatever else I can get my hands on ) I have a great job. It's never the same and I usually get to travel quite a bit.

I've got other stuff on my site LINK The Oil folder has some of the more recent graphic panel screen shots and if I remember right some programming examples (I had a customer that wanted to see some examples so I took some screenshots).