Real-World Spherical Reservoirs

Are you asking about something like a diving bell or a salvage balloon?

Citroen cars have used spherical accumulators for suspension and brakes. This site shows some pictures.

Do not Fuel Cells take that shape?

And the tanks around Rocket Nozzels?

And that Spare Air tank for tire repair my Red Neck Uncle made

Liquefied Petroleum Gas ("LPG") is stored in spherical reservoirs.

http://images.uk.ask.com/fr?q=LPG+tanks&desturi=http%3A%2F%2Fwww.alamy.com%2Fstock_photography%2F1%2F5%2FBill%2BHeinsohn%2FAN8C71.html&fm=i&ac=24&ftURI=http%3A%2F%2Fimages.uk.ask.com%2Ffr%3Fq%3DLPG%2Btanks%26desturi%3Dhttp%253A%252F%252Fwww.alamy.com%252Fstock_photography%252F1%252F5%252FBill%252BHeinsohn%252FAN8C71.html%26imagesrc%3Dhttp%253A%252F%252Fwww.alamy.com%252Fthumbs%252F3%252F%257B83DDA7D0-0C13-45B5-AE82-137936C21D57%257D%252FAN8C71.jpg%26thumbsrc%3Dhttp%253A%252F%252F65.214.37.88%252Fts%253Ft%253D13630370281850834070%26thumbuselocalisedstatic%3Dfalse%26fn%3DAN8C71.jpg%26imagewidth%3D300%26imageheight%3D461%26fs%3D35%26ft%3Djpg%26f%3D2%26fm%3Di%26ftbURI%3Dhttp%253A%252F%252Fuk.ask.com%252Fpictures%253Fq%253DLPG%252Btanks%2526page%253D1%2526pstart%253D&qt=0

You've won the prize for the longest URL I've seen. The check's in the mail.

Agreed Ken, It's quite a beauty!

I guess he never heard of TinyURL.com !

How cool -- I'd never heard of tinyURL.

Here's the revamped link to PW's page: http://tinyurl.com/2fshtu

There are these things, too.

What about widgets for draught beer in a can:-

http://en.wikipedia.org/wiki/Widget_(beer)

What about air tanks for skin divers?

If I read the original question correctly, you initial respondents are not taking into account that the requestor asks about pressure inside and outside the sphere, a la a sphere at some depth under the surface of a lake or the ocean. I don't assume that 1 atmosphere is what the requestor had in mind. I did some work developing an acoustic monitor that was to be dropped onto the bottom of the ocean to record ship's propeller frequencies and associate those sounds with satellite photos of the ships in question, with a very limited water seepage under significant pressure. But maybe my experiences are coloring the way I read the original request.

In fact that seems exactly what i looking for. You have some pictures of that to i understand better, and see if that is really what i´re looking for.

Thanks.

"I have an example, that is a spherical Reservoir that contains gas and is under water, that way his have pressure on both sides,"

If it were not under water it would have atmospheric pressure on the outside!

Spherical storage vessels are used for storage of high pressure gasses as a spherical shell has the greatest volume for the least amount of 'skin' or tank wall material and also a uniform stress distribution. All storage vessels have internal pressures due to depth of liquid and any over pressure as well as the external atmospheric pressure.

Thanks for your help and all others that answer my question. I just like to ask you for photos of that reservoir. If you have please let me know.

Here is something that might be helpful.

Tank Technologies

Photos of a large tank IF it can be located again.

Photo in Fifth Row Down on Right

For a real world example, how about the real world. It's close enough to being a sphere. Perhaps a bathysphere?