Aluminum under pressure

[airgunmike56]

IMy wife and I was setting in the kitchen when a diet soda exploded in the cabinet, it was very loud, The can was bent all out of shape like I shoot it with a hollow point .
Now I have had a Carbon Fiber 4500 psi tank fail on me and the Carbon bands just let go with tiny little leaks.
Leads me to think the metal tanks when they fail the metal fails, On the Carbon fiber tanks the carbon bands fail and just let go very slow,
Mike

 

[Spinach]

Last summer I was sitting in the shade, 34c.
Just looking through a scope, no pellets involved, fortunately.
Rifle took off, full summersault. Luck was on my side. No injuries.
I honestly thought the bottle had exploded.
New underpants , a new o ring, 250 plus bar, doing gymnastics, a thoughtful moment.
Obviously I don't have that on video, but when my nerves settled I got a picture of the bottle/ o ring.
Stay safe guys.
Thankfully it was a carbon bottle RTI.
Tough f@@kers. Well tougher than me.

 

[steve-l]

IMy wife and I was setting in the kitchen when a diet soda exploded in the cabinet, it was very loud, The can was bent all out of shape like I shoot it with a hollow point .
Now I have had a Carbon Fiber 4500 psi tank fail on me and the Carbon bands just let go with tiny little leaks.
Leads me to think the metal tanks when they fail the metal fails, On the Carbon fiber tanks the carbon bands fail and just let go very slow,
Mike

Mike, what is the rest of the story? What happened to the failed tank? Did you cut the tank in half to see the exact failure? If not, why not?

 

[airgunmike56]

I posted a few years ago about the tank, Pictures and everything, In a nut shell, The tank would leak down to 3000 psi I would fill it up to 4500 and in a week it would leak down, I sprayed with soap I see no leaks, I then stuck it in a full bath tub and tiny leaks every where, The Carbon bands had slipped and did there job , No need to cut in half.
When I was changing the Oring and Valve about a cup of white snot came out of the tank? Nasty stuff, No rust,
Mike

 

[silvershooter589]

Very curious how this thread goes. For some reason I trust metal over carbon fiber. I used to play lacrosse and our metal sticks would fail more gracefully than carbon fiber sticks. Which were usually steel, aluminum, or titanium alloy. I'd rather have something bend, flex or show signs of fatigue than just blow apart like those carbon fiber sticks did.

Also was big on mountain biking and saw the difference between steel, aluminum, titanium, various alloys, carbon fiber and composites when they failed. Maybe titanium alloys are too expensive for airguns but seems like those were the hardest to break. And when they did break it was a smaller failure. Steel being 2nd place, but heavier.

That all said if aluminum is thick enough, it does the job. Too thin and you're in trouble. I suppose the same would be true for CF, although the manufacturing process leaves me more room for doubt.

That is crazy about the white snot. No rust though. Hopefully smarter people will chime in.

 

[steve-l]

Mike, that white stuff is aluminum oxide mixed with the water and that's what killed the tank, not the CF. Had you cut the tank in half you would have discovered the inside surface of the aluminum core would look like the rocky mountains from the water corrosion. That is the rest of the story.

 

[rodm1]

I posted a few years ago about the tank, Pictures and everything, In a nut shell, The tank would leak down to 3000 psi I would fill it up to 4500 and in a week it would leak down, I sprayed with soap I see no leaks, I then stuck it in a full bath tub and tiny leaks every where, The Carbon bands had slipped and did there job , No need to cut in half.
When I was changing the Oring and Valve about a cup of white snot came out of the tank? Nasty stuff, No rust,
Mike

How old whose the tank?