Tank Weight

Material?

40 ft diameter or circumfrence?

Sounds like homework to me.

Presuming it includes a bottom, does it also include a top? The given plate thickness is not enough to make this a pressure vessel; how are you controlling the ammonia pressure? Is thermal insulation to be included in the tank weight?

There is not a lot to go on here, but, If the tank is not reinforced because it is pressurized, and it is made of steel, a rough figure to work with is 2.5 pounds per gallon. Good luck.

More information, please! Material, shape, unusual design features, etc.

If the material is carbon steel and the tank is empty, the weight is aproximately 8000 kg, this value is only for estimation, if you need a value more precise, we need more information.

Regards,

What's it made of - balsa wood? Osmium?

You dont provide enough info about the tank material, however, since I know that Ammonia is mild steel friendly i'll try and work this out. Bear in mind that "feet and inches" is foreign to me, thus i will work in metric. Remember that mass= volume *density and the density of mild steel is typically 7800 kg/cu meter. Therefor the volume of the tank comes to 0.8905 cu/m * density =6943kg. The bottom, assuming its not conical have a volume of 1.1111+ cu/m with a weight of 8671 kg. These dimensions (and calcs) suggests that the diameter is probaly not the stated 40 ft but may be circumference.

Thus the picture changes somewhat. now the tank steel volume becomes 0.283 cu/m, and a weight = 2210 kg. For the bottom the volume = 0.1126 cu/m at 878kg.

Whatever your dimensions, you now add 2210 to 878 to get 3088 kg for open top tank. If the tank have a top add another 878kg to the already added kgs (878+878+2210=3966). Of course this is ONLY the steel weight without legs or appurtenances and empty. Either of above calcs (if accurate and correct) will help you out, you basically take your pick.

<...3966[kg]...>

PVC is also ammonia-friendly, and a suitable tank in it would weigh rather less.

Until the OP gives the forum some more information, one question might be "How heavy does the tank need to be?"

The OP stated he had a tank of stated dimensions. He did not ask what material he should use, and in fact I used mild steel because i know that it is ammonia friendly, not because I say he must use steel, or that you cannot use anything else. Hope this response takes the "near" sting out of your post. AND he wanted to know how heavy IS the tank......

Empty or full?

Many a times we get such questions when Guests asking questions does not respond.It will be better to not respond to such questions.

Don't do it, then!

This might help:-

http://www.steelforge.com/steelweights.htm

A few random issues:

1. At atmospheric pressure, liquid ammonia is -28°F. PVC would be too brittle at that temperature. Even SA-36 steel might not suffice, but SA285-C or SA516 would do.

2. Liquid ammonia at -28°F weighs about 40 lb/ft³, or about 5.5 lb/gallon.

3. Some kind of refrigeration system may be required.

Just to add to that "random";

"Ammonia" might mean granular fertilizer or ammonia gas (at some pressure?)

Or 3/8 'average' might mean banded construction, or staged wall thickness.

"Tank" might mean silo or hopper.

"Weight" might mean for shipping weight (empty) or for foundation loading full.

Or ..... 'ammonia' is random 'data spillage' in one of those assignment questions written (lazily) around a picture in Perry's. "Find the weight of the tank on pp ##"