why are compressed gas cylinders round?

Answer 1

Because a round shape can bear higher pressures than a box-shaped structure.

In fact the optimal shape for keeping high-pressure gases is a sphere, but it is unusual because it's difficult to store this type of containers. But you can see them in oil refineries, for example.

Answer 2

All other answers are good but not correct here is the correct and accurate answer.
Thats the power of ARC, when u try to keep a coin on top a paper when the two edges are only the support it will fall
fold the same paper on its vertical lines then redo the experiment it will stay on top. thats the reason any strong roofs are made as a dome. the same reason cylinder are used.

Answer 3

because round is a strong shape as corners are the weakest spots for damage say if it was dropped. Also round cylinder the huge pressure inside is equal and should a cylinder should suddenly depressurize because it split the effects could be disasterous.

Answer 4

Corners act as stress concentrators. Worst example was the early comet jet aircraft which had square windows which led to compression failure at high altitudes. All aircraft windows now have very rounded corners.

Answer 5

many of the above answers are correct.

as rightly said, sphere is good shape for tackling the forces thar are due to storage etc. But it is uncommon due to the practical difficulties like manufacture, proper seating etc for specific applications.
so to get the advantage of hoop stress, cylinders are used. circular configuration is equally strong along both the axes.

Answer 6

Because they are easier to weld and less prone to leaks from corrosion. A square cylinder would be more apt to rust in the corners.

Answer 7

Because the least material is required for a given strength.

Answer 8

strength