Is is possible to add a stiffening ring/s to increase the fill height of a change of service tank? I would like to change service of a storage tank, but based on API653 calcs and the new specific gravity, the tank level will have to be significantly reduced (original S.G.=1.0, new S.G.=1.21)...
It is possible, the contents of this tank have a S.G. of 1.4. The operating level of this tank typically is around 35 ft (40ft tall tank). I am not sure if anything actually needs to be done. I believe I will MT the weld seam at the top of the dent and let the tank continue operation. I am...
We recently noticed a dent in the 2nd to top shell course of one of our tanks. The 6" gooseneck screen was plugged so I assume the tank was exposed to vacuum recently. The question is, is there anything required to do to this tank now that the shell has a dent in it? I cannot find anything in...
I just received notice that the entire site's capacity must be under 1 million gallons. So, I will have to reduce this tank's capacity by 300,000 gallons. I am going to cut the shell and lower the roof. Thanks for all the comments.
Concrete was discussed, but I feel confident that pouring concrete would not be in compliance with API. If this was performed, the bottom of the tank could never be inspected again without removing the concrete. Also, the tank is full of #2 diesel fuel, that would most likely deteriorate the...
The tank has to be physically modified so that it can never hold 1 million gallons again. Shell vents, overflows, etc can be removed and are not acceptable. I would like to add a cone/cylinder to the bottom of the tank to displace 15,000 gallons, but this alteration "could be altered again" to...
Due to a EPA request, I have to physically and permanently limit our fuel oil storage tank from 1 million gallons to 985,000 gallons. Level indicators and administrative controls are not acceptable. I can find no reference in API on reducing a storage tank capacity. How would I best limit...
