Spherical/Cylindrical storage tank which to choose?

Hallow,

Many a time it is on account of availability of space and requirement of inlet,outlet etc. connections.Of course cylindrical tanks r easy to fabricate.

Second thought:- Cylinders of different geometrical shapes breaks monotony at work place.

Rajeev Kumar

If you're really ambitious, you can paint smileys on the round ones.

From what I understand, it seems to be an economical choice as spheres can be constructed from thinner plate than cylindrical vessels as the volume increases.

Yes, but why?

Hoop stress in cylindrical tanks = (pr)/t.

Longitudinal stress in cylindrical tank = (pr)/(2t).

Hoop stress in spherical tank = (pr)/(2t).

where p = internal pressure of tank.

r = radius of tank.

t = thickness of tank wall.

Based upon the above considerations, either it's because propane is stored under higher pressure, or it vaporizes more readily and will thus exert more pressure upon vaporization.

if i recall propane is a heavy gas and is stored in liquid state at a lower pressure than ethane lighter gas to keep in liquid state -180c you need a thermos bottle so you just compress it in a thick wall bottle

if i recall propane is a heavy gas and is stored in liquid state at a lower pressure than ethane lighter gas to keep in liquid state -180c you need a thermos bottle so you just compress it in a thick wall bottle

i goofed ethane gust requires a thicker wall bottle because of the higher pressure needed to store it

propane boiling point -42c

ethane boiling point -86c

While a sphere is intuitive for any pressure vessel....

Large spheres with thick walls are difficult to stamp. Many more fabrication shops can roll a cylinder and make or buy the heads. CBI and only one or two others were doing the thick (<2 inches) spherical sections in the US, last I heard.