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Air Compresser

11/16/2016 12:11 PM

In 7 inch length and 7 inch round aluminum tank how much air (psi) we can compres?

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Pathfinder Tags: ok plz help me
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#1

Re: air compresser

11/16/2016 12:13 PM

I'm just guessing but I wouldn't exceed 27000 bar!?

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#2

Re: air compresser

11/16/2016 12:21 PM

One stroke? Or until it bursts!

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#3
In reply to #2

Re: air compresser

11/16/2016 12:37 PM

Maximum Stoke

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#4

Re: Air Compresser

11/16/2016 1:25 PM

I'm going to make you think a bit.

Do you think there is a limit of how much air (and therefore pressure) the tank will hold?

What would determine this limit?

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#5
In reply to #4

Re: Air Compresser

11/16/2016 1:33 PM

How much it can compres . Like 2000 psi or 1000 psi

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#28
In reply to #5

Re: Air Compresser

11/17/2016 3:22 PM

I think a tank does not compress anything. It just holds what has already been compressed. But, then I'm not an engineer. (Don't ask what I'm doing here then, I ask that everyday - often more than once!) - JHF

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#32
In reply to #5

Re: Air Compresser

11/19/2016 10:04 AM

More like 104,000 psi

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#6

Re: Air Compresser

11/16/2016 1:38 PM

If the tank was manufactured as a compressed air tank then look at the manufacturer's data.

If the tank was not manufactured as a compressed air tank then please refer to this site for a better understanding of what is going on.

If this is a homework question then you did a really poor job of asking us to do your homework for you.

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#9
In reply to #6

Re: Air Compresser

11/16/2016 1:51 PM

No, hahaha actualy i am working in a project for air rifle so i Want to know about air compres, the tank was not banded its is lighter refile tank but the condition is looking quite good

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#21
In reply to #9

Re: Air Compresser

11/16/2016 7:02 PM

I guessed as much and no further help will come forward from my side for this.

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#7

Re: Air Compresser

11/16/2016 1:45 PM

What color is the tank?

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#8

Re: Air Compresser

11/16/2016 1:46 PM

And the tank thickness is?

No guarantee this is not a custom tank built from scratch.

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#10

Re: Air Compresser

11/16/2016 2:10 PM

Any metal tank is manufactured for purpose...If that tank is specified as aluminum cylinder 7" in diameter, then the pressure required will determine the thickness and composition of the materials, as well as the specification with which the tank will be constructed and certified, this information is generally required to be stamped on the cylinder( ISO 13769 in the USA), and time limit between recertifications, as well as maximum useful life....So there is no answer to your question, it depends on the aluminum used, any treatments of that metal, the thickness of the metal and the construction methodology of the vessel, the age and compliance of the tank...I would add without this information you can not legally pressurize this tank....

https://en.wikipedia.org/wiki/Diving_cylinder

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#12
In reply to #10

Re: Air Compresser

11/16/2016 2:21 PM

Ok thanks

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#11

Re: Air Compresser

11/16/2016 2:11 PM

How big is your compressor?

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#13

Re: Air Compresser

11/16/2016 2:45 PM

The volume of your tank is 7 x π x (7/2)2 = ~ 270 in3

liquid air has a density of 0.87 g/cm3

and normal air has a density of 0.001225 g/cm3

so you can get 0.87 / 0.001225 = ~ 710 times as much liquid air in the tank as normal air.

So 270 x 710 =~ 192,000 cubic inches =~ 111 cubic feet.

Of course others have alluded to other constraints like the strength of the vessel; the capability of your compressor, and, most importantly safety.

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#26
In reply to #13

Re: Air Compresser

11/17/2016 8:49 AM

You beat me to the obvious math.

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#14

Re: Air Compresser

11/16/2016 3:21 PM

In your case, zero.

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#15

Re: Air Compresser

11/16/2016 3:26 PM

If it is a light thin walled container then I would not exceed 100 - 120 PSI but if it was pre-filled and emptied and you are trying to repurpose the "tank" then what you're doing is probably dangerous or even illegal if you do not have the manufacturer specifications available!

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#16

Re: Air Compresser

11/16/2016 3:28 PM

Play with marshmallows. They're safer.

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#30
In reply to #16

Re: Air Compresser

11/17/2016 10:04 PM

Lyn, I don't know about that, my older brother tried to eat a flaming one and burned his tongue.

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#31
In reply to #30

Re: Air Compresser

11/18/2016 8:02 AM

Well, there ya go.

That may fall under the classification of "you just can't make everything idiot proof because they're always making better idiots".

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#17

Re: Air Compresser

11/16/2016 5:07 PM
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#19
In reply to #17

Re: Air Compresser

11/16/2016 5:23 PM

My (National Champion) paintball playing kid just told me his tank is pumped to 4,500 PSI.

Typical limit for non-pro tanks is 3,000 PSI.

You'll shoot your eye out.

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#23
In reply to #19

Re: Air Compresser

11/16/2016 7:58 PM

These games go fast....

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#24
In reply to #23

Re: Air Compresser

11/16/2016 9:46 PM

Yes they do.

So do the paint balls. Get hit in an unprotected area with one and it's instant bruise.

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#25
In reply to #24

Re: Air Compresser

11/16/2016 9:56 PM

Try getting shot in the finger at a range of only a foot. Ouch.

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#18

Re: Air Compresser

11/16/2016 5:21 PM

What does it say on the vessel's last insurance examination report?

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#20

Re: Air Compresser

11/16/2016 5:26 PM

One of the options is to wait for responses to Anonymous Poster no.1's thread in the CR4 feedback section. After all, the two threads are very similar.

Another is to pump it up until it goes BANG! and then reduce the pressure by a factor of, oh, say 2/3? Only, please make sure all other CR4 readers are at least 500m away from it before starting this activity.

Ye gods....

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#22

Re: Air Compresser

11/16/2016 7:14 PM

My horse is 17 hands high, how much hay can it eat in a day without foundering?

.

My car is just over 177" long, what kind of highway fuel economy can I expect.

.

A plane has a maximum takeoff weight of 68,000 pounds, what is the top speed?

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#29
In reply to #22

Re: Air Compresser

11/17/2016 5:34 PM

More important - it's 13 miles from the office to home, so whats for diner? - JHF

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#27

Re: Air Compresser

11/17/2016 10:40 AM

If you are going to experiment with how much pressure it can handle fill it with water first. Water doesn't compress as much as air and when it explodes you will likely injure no one other than yourself.

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