SpudFiles

wyz2285 wrote:

What "kind" of stainless? ie 304, 316, 440, etc. You need to be able to determine the yield strength of the material...can't find that if you don't know what it is.

I don´t know just normal stainless steel tubes used for water...
OD wound be 22mm

You use stainless for plumbing pipe? If that's the case, phone a plumber and ask them what type of stainless it is...look up the material properties of that type.

Will suggest you do a google search on Barlow's formula.

Gippeto wrote:

wyz2285 wrote:

What "kind" of stainless? ie 304, 316, 440, etc. You need to be able to determine the yield strength of the material...can't find that if you don't know what it is.

I don´t know just normal stainless steel tubes used for water...
OD wound be 22mm

You use stainless for plumbing pipe? If that's the case, phone a plumber and ask them what type of stainless it is...look up the material properties of that type.

Will suggest you do a google search on Barlow's formula.

My humble suggestion is to assume that it will be unsafe, and buy pressure rated pipe. You may be spending more money, but personally I'd rather spend a few dollars here, than a few hundred dollars in the emergency room if the pipe in question were to give way to the pressure.

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look no further:

http://www.spudfiles.com/forums/epoxy-c ... t8916.html

http://www.spudfiles.com/forums/making- ... t8919.html

Thank you! thank you!

The type is INOX 1.4301 pipe I think, it´s wirtten on it, but it also says AISI 305 and EN 10312

1.4301 is 304 type.

INOX information:

http://www.euro-inox.org/pdf/map/What_i ... eel_EN.pdf

So is it safe?(kind lasy to read all the pdf )

Yes, any fittings you make will fail long before the pipe itself does.

Would there be a noticeable difference in performance between a barrel sealer and a chamber sealer inside the same tee sealing against a 1/2" nipple?

Possibly. The one with the seat ratio closest to 1:1 would perform better. It would allow the pilot to be more empty when the valve opened, so it would experience more force for a greater opening time. For a reasonable tee size and port diameter, this is the barrel sealer

Also, the chamber sealer will likely have more dead volume.

http://www.spudfiles.com/spud_wiki/inde ... ston_Valve

It would allow the pilot to be more empty when the valve opened, so it would experience more force for a greater opening time.

Not sure if you mean better time or bigger time. Because it would be a shorter opening time.

I know that golf balls are about 1.68", but how consistent are they? Would they get jammed in a 1.68 ID aluminum tube?

Gun Freak wrote:

It would allow the pilot to be more empty when the valve opened, so it would experience more force for a greater opening time.

Not sure if you mean better time or bigger time. Because it would be a shorter opening time.

Damn, that was pretty dumb wording.

I have a short question of my own:

Is there a reasonable way to exceed the performance of the following cannon scheme without going hybrid?

Barrel limited to 4-6" long

1. Fill chamber completely with liquid nitrogen (no gas space)
2. Seal chamber
3. Allow LN2 to "evaporate" into supercricical fluid
4. Dump with balanced hammer valve.

This would theoretically give me about 700 bar (expansion ratio of LN2 is ~1:700. Liquid Helium, Hydrogen, Oxygen, and Neon are higher, but more expensive or reactive.

Out of curiosity, what is the bore of said setup?

ramses wrote:4. Dump with balanced hammer valve.

I would favour exhaust valve + detent.

One would question the point though