Stainless Steel Storage Tank
Stainless Steel Storage Tank
(OP)
Can anybody suggest a suitable design code (British or European preferably) for a vertical stainless steel storage tank which will contain an acidic solution?
The tank will have removable heaters, probably electric, to raise the temperature of the contents to about 50 deg Celsius. Will this make it a fired or an unfired pressure vessel?
Due to access constraints, the tank will also have to be built up from various sections and either bolted together or welded in proximity to its final location.
Sorry this is a bit vague at the moment, but we are at the project scoping stage at the moment.
Thank you in advance for any answers
Fred2002
The tank will have removable heaters, probably electric, to raise the temperature of the contents to about 50 deg Celsius. Will this make it a fired or an unfired pressure vessel?
Due to access constraints, the tank will also have to be built up from various sections and either bolted together or welded in proximity to its final location.
Sorry this is a bit vague at the moment, but we are at the project scoping stage at the moment.
Thank you in advance for any answers
Fred2002





RE: Stainless Steel Storage Tank
RE: Stainless Steel Storage Tank
The selection of the appropriate design code, tank features etc is mostly controlled by the design pressure.
Generally speaking, if it is over 15 psig, use ASME VIII, BS 5500 etc, if under 15 psig consider a flat-bottomed code such as API620, Under 2.5 psig use API-650 or it's euro equivalent....
My opinion only...
What is the temperature & pressure of your application ?
What is the volume cobtained and vapor pressure of the liquid ?
My opinion only
-MJC
RE: Stainless Steel Storage Tank
I hope this helps.
BR,
Patrick
RE: Stainless Steel Storage Tank
I've not heard of API-650 before, presumably it's an American standard. I wasn't aware of BS EN 1993-4-2 either, so I'll try and get hold of it.
The bottom will probably be conical shaped to help any sediment drain out. The tank it's replacing is flat-bottomed, though.
I presume the pressures you are referring to are static depth pressures. The maximum tank height will be about 1.5 metres and the depth of solution about 1.2 metres. So depth pressure = 1000*9.81*1.2 = 11772 Pa = 0.117 bar = 117 mbar.
5% acid solution temperature will be 50 deg celsius. The tank, although covered, will be open to atmospheric pressure. I would think that the vapour pressure would be similar to water. Tank volume is 400 UK gallons (~1.8 m^3)
I'm still not entirely certain if adding electric heating to raise temp to 50 deg C turns it into a pressure vessel which means that PD 5500 or BS EN 13445 need to be consulted.
I hope this clarifies a few issues.
fred2002
RE: Stainless Steel Storage Tank
cheers,
gr2vessels
RE: Stainless Steel Storage Tank
RE: Stainless Steel Storage Tank
RE: Stainless Steel Storage Tank
RE: Stainless Steel Storage Tank
EN14015 "Specification for the design and manufacturer of site built vertical, clindrical, flat bottomed , above ground , welded steel tanks.."
Thus flat bottom and welded..
This replaces the old BS 2425 or was it 2524 ??
Replaces the french CODRES ( which is similar to API 650)