Large ring-in-ring tank from steel?
Large ring-in-ring tank from steel?
(OP)
In the wastewater field, you sometimes use ring in ring tanks, like here:
http://www.monostore.com/uk/index.php/website_uk/c...
Is there any company that build such tanks from glass lined steel?
What would be the major challenges? What if the outter ring is roofed?
I'm asking a very open ended question here, I know. Usually we build with concrete, now a tender may force us to use steel, and I need to udnerstand the problems and possibilities.
http://www.monostore.com/uk/index.php/website_uk/c...
Is there any company that build such tanks from glass lined steel?
What would be the major challenges? What if the outter ring is roofed?
I'm asking a very open ended question here, I know. Usually we build with concrete, now a tender may force us to use steel, and I need to udnerstand the problems and possibilities.





RE: Large ring-in-ring tank from steel?
From a cost perspective, you will always be ahead if you can build two round steel tanks side by side, adjusting diameters as needed, rather than one inside the other.
RE: Large ring-in-ring tank from steel?
Second, while it is possible to use a *welded* steel tank for the inner tank with the necessary stiffeners, it may not be economical to do so. However, you mentioned glass lined steel. Glass lined tanks that I have seen are all bolted. These are not suitable for the external pressure required for the inner tank.
If there exists no possibility of external pressure on the inner tank by design, it may be possible to construct such a tank system from glass lined steel.
RE: Large ring-in-ring tank from steel?
I can't imagine glass lined - maybe epoxy or rubber?
RE: Large ring-in-ring tank from steel?
RE: Large ring-in-ring tank from steel?
In normal operation, both tanks will be filled to about the same level, but we want to be able to empty one - so we might have the case that the inner tank is emnpty and bears the static pressure from the liquid in the outter ring.
Also, our suppliers for steel tanks (if we build with steel) bolt their tanks.
Last not least, operating procedure seems to be to start with the top of the tank, build a section, lift it up on jacks, build the next section, etc. I've never done such a thig, but I assume additionaö headaches with a ring-in-ring situation.