pneumatic tank

[webby]

got 2 old soda stream co2 tanks from a jumble. would they be any good for a fliper gas tank?

link to pic http://i24.photobucket.com/albums/c9/st ... G_6525.jpg

[Anttazz]

Re: pneumatic tank

I'm pretty sure they're banned now.

[jonny]

Re: pneumatic tank

For main tank use they have to have an on off valve or adapter. You can take the valves off and they'll make good buffer tanks though

[webby]

Re: pneumatic tank

cool, how come there banned?

[jonny]

Re: pneumatic tank

Co2 main tanks must have an on/off valve instead of just turning on when screwed in, I believe this is for safety reasons. Are they full bottles?

[maddox10]

Re: pneumatic tank

The rules are clear.

9.6 Remote Isolation Valve
Gas cylinders that do not incorporate a valve (for example: the gas is released as soon as the cylinder is screwed into it€Ÿs mating pneumatic connection) such as found on disposable welding bottles and €žfizzy
drinks€Ÿ machines must have an additional remote isolation valve accessible from outside of the robot.

In other words, those tanks ain't banned.
But it takes a bit more effort-weight and money wise- to use them

[webby]

Re: pneumatic tank

ok so if i put a on/off valve they would be ok, cool

[plargen]

Re: pneumatic tank

hi got a quick question on pressure testing as i have an old dry powder extinguisher that has 25bar stamped on the bottom and i only intend to use it up to about 10-11 bar as a reservoir, would i need to get it tested or would i be ok to use it

[maddox10]

Re: pneumatic tank

9.7 Rating
All pneumatic components used with pressures greater than 50psi (3.4bar) must be rated/ tested to at least
the maximum pressure available in that part of the system. You may be required to provide documentation/certification to support this.
9.7.1 Custom Components
Custom made components, or parts operating above the suppliers maximum working pressure, must be
independently tested and certified at 120% of the maximum system pressure available at that point.

It seems you should have some documentation stating the parts used are rated at the working pressure or better.

[plargen]

Re: pneumatic tank

it does have 25bar stamped on the tank but there is no uptodate paperwork

[typhoon_driver]

Re: pneumatic tank

Surely the pressure stamp on the tank along with a valid until date (should be one) is certification enough? I don't remember any other roboteers bringing paper work along to events

[plargen]

Re: pneumatic tank

all i can find on them is the stamped in proof pressure of 25bar and an what remains of the label i say that the test pressure is 16bar and that they were manufactured in 1995

[maddox10]

Re: pneumatic tank

I fear age is a problem here. A pressure vessel need regular recertification/restamp.

And paperwork. In most cases the test stamps on the pressure vessels are enough.

Main thing tech checkers look at is the quality of the work of the system.
If it does look crappy, a closer look is in order.

[plargen]

Re: pneumatic tank

ok so probably easier to buy a cheep new 1