Is a Non-rated Pipe Safe if I Pressure Tested It?

[Xamllew]

Hey guys, I found a nice seamless steel pipe in the trash the other day, aside from some light surface rust I was thinking it would make an excellent coaxial chamber. The walls are fairly thin however so I was going to stress test it. My question is if I wanted this pipe to stand up to being pumped up to 3 or 4 hundred PSI over and over would a simple pressure test where I pressurize it to say 500 psi suffice for safety, or could there be concerns with wall integrity over many shots?

[farcticox1]

is it in this chart ?

http://www.engineeringtoolbox.com/a106- ... d_370.html

[sharpshooter]

Probably. But maybe not. Depends on what sort of risks you like to take.

[Xamllew]

is it in this chart ?

http://www.engineeringtoolbox.com/a106- ... d_370.html

Ah, but the problem here is I have no idea the wall thickness or the carbon content of the steel, for all I know it could be wrought iron. All I can really tell you is that the walls are about 1mm thick, about as thick as a penny, and that the pipe was used for some sort of metal frame or chassis for a piece of furniture.

Probably. But maybe not. Depends on what sort of risks you like to take.

I typically don't take risks that involve shrapnel, but I'm desperate for a good seemless length of steel pipe.

[farcticox1]

Almost sounds like ornamental tube, but that wouldn't be seamless ?

[D_Hall]

Could be drawn over mandrel... Which would still have a seam but it would be difficult to see the seam.

[Xamllew]

Ya know what, I'm just going to go the safe route and buy some copper pipe in a few days. I'm confident that this pipe could take a few hundred PSI without breaking a sweat, but I'm worried about long term material fatigue though.

[Labtecpower]

I'd trust it, the burst pressures on these pipes are higher than you'd expect. I've taken 30x0,5 mm aluminium pipe up to 400 PSI, not advising you to do so however..