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I am intending to construct a small pressure vessel. It needs to be around 7 centimeters in length and width and around 1-2 centimeters in depth. It must be capable of being pressurised to 300 psi with sufficient space to contain a small amount of liquid (say 5cc)

Constraints

  • The body of the vessel must be made out of nickel-plated annealed brass.

  • The vessel will have a brass cap, held in place with silver solder.

  • The cap must be sufficiently thin to be pierced when it is inserted into a receptacle.

Is this design feasible?

Richard
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1 Answers1

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Sure. CO2 cartridges are made of steel and hold 850 psi. You want to use brass, which has 80% of the yield strength of steel (200MPa vs 250MPa) to hold 35% of that pressure. Not to mention the fact that you specify a 7x7x"1-2"cm vessel, which is 49-98cc, to hold 5cc of liquid, so you're left with up to 93cc of brass to use as the wall thickness, where again, the same dimensions as a CO2 cartridge should suffice due to the difference between yield strength and desired pressure limits. The use of silver solder won't matter because you can use whatever surface area you need to provide enough contact area to provide a solid joint - see the comment above about having plenty of excess volume.

Chuck
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