They are similar to those ~5 gal soft drink containers which I hydro tested
until my arm gave out at 1100 psig. The tank kept yielding like bubble gum
as the yield pressure kept approaching ultimate tensile strength. 300
series SS is an incredibly forgiving metal alloy which gives plenty of
warning before failure, ~ 40% between YS and UT. One reason why SpaceX is
using it in their Starship before progressing on to higher performance
alloys like A286,maraging,etc.
I have lots of other experiences that would be of interest if you want to
contact me off list.
Ken
On Sat, Jan 30, 2021 at 2:18 PM Carl Tedesco <ctedesco@xxxxxxxxxxxxxx>
wrote:
Charlie,
I have used these stainless steel water fire extinguishers at pressures up
to 550 psi and hydro tested them to 700 psi...
https://www.firesupplydepot.com/fas-a240-e.html
<https://www.firesupplydepot.com/fas-a240-e.html>. I was told, but have
not verified, they fail at 800 psi. I have used them for LOX and kerosene.
I did weld a 3/4 NPT female weld bung to the top end and a 3/8 bung at the
bottom as shown in the link above.
—Carl
Sent from my iPhone
On Jan 30, 2021, at 10:26 AM, Charlie Jackson <
charliejackson8629@xxxxxxxxx> wrote:
Hi everyone,
I’m looking into some options with regards to the fuel tank for my liquid
rocket engine and would appreciate some advice with regards to the general
structure. As of right now, I am considering using a fire extinguisher tank
and modifying it with regulators, pressure release valves, check valves
etc. Is this a good (or dangerous) idea? And if so what is the best way to
implement it. I should mention I am not planning to deal with extreme
pressures as this is my first attempt with rocket engines.
Kind regards, Charlie