Any idea for recycling an old compressed natural gas cylinder?

It was in the waste, I recovered it.

• weights 34 kg (75 pounds)
• diameter 24 cm (9.4 inches)
• length 80 cm (31.5 inches)
• capacity 30 liters (7,9 gallons),
• working pressure 200 bar (2900 PSI).
• hemispherical ends
• medium hard steel

Maybe I could make a crucible for melt aluminum, copper, etc, cutting 15 cm from the bottom. But for this it is a little big. 

I am waiting some suggestion. Thanks in advance!

Comments

[DriX]

Si precisas cortarlo, yo poseo cortadora de plasma, no tengo problema en hacerlo gratis, aunque deberías traerlo hasta Mercedes (es pasando lujan).
Igual averigua que seguro hay alguien con plasma cerca de donde vivís, no cobran caro para cortar.
Sobre qué hacer con el cilindro de GNC, no tengo la menor idea. Yo tengo un equipo completo (dos cilindros + cañeria + regulador) que le saqué a mi Jeep y no sé qué hacerlo, porque para venderlo me dan unos 500 pesos, terrible.
Aguantan un poco más de 200 bar, 250 seguramente, a mi me cargaban varias veces a 220 o 230, depende de la estación, hay veces que están más presión. Igual no se me ocurre de ningún gas que sea útil almacenar a una presión tan tan tan enorme, caseramente.

Tené en cuenta que cuando lo vayas a cortar, además de ventearlo (lo hacen en un taller de gnc) deberías lavarlo muy muy bien o cortarlo con agua adentro, son muy peligrosos los restos de gas o combustible. No creo que alcance con abrir la valvula (yo no probaría).
Una opcion fácil sería usar una sierra caladora con hojas para acero, ya que no genera chispas.

Yo me inclinaría más a la idea de la salamadra. De acá al invierno tenés tiempo para hacer una muy linda.


Si tenés algun motor naftero chico que no te sirva, podés convertirlo a un compresor muy facilmente, y usar el cilindro de gnc como tanque. Nunca subestimes el poder de tener un buen compresor (no es lo mismo la pistola para pintar, un compresor tira aire parejo y podes usar herramientas neumaticas tambien, que son baratas y utiles).

Un abrazo.

[rimar2000]

Hola DriX, parece que el sistema de comentarios de Instructables está fallando, ayer y hoy tuve que deletear y repetir varias respuestas, entre otras la tuya. Gracias por las sugerencias y el ofrecimiento, pero viajar hasta Mercedes me va a salir más caro que hacerlo cortar acá cerca. Lo de la caladora no lo veo, mirá que es acero semiduro de media pulgada... Y un compresor me va a ocupar medio taller.

[doo da do]

I have heard a few of the lage wind chimes and the sound great. Go for the wind chime.

[rimar2000]

Thanks, your idea is good, but I did this: http://www.instructables.com/id/CNG-tube-salamander-stove-salamandra-de-tubo-GNC/

[powerman666]

Paint it gold, then attach parts to it to make it look like a robot.

[rimar2000]

Thanks, but I did this: http://www.instructables.com/id/CNG-tube-salamander-stove-salamandra-de-tubo-GNC/

[sjoobbani]

You can make an air cannon if you have an air compressor. If it's still a good pressure vessel, then you can use it for almost anything! You might not want to pressurize it to full capacity though...

[stanlesha]

yeah right

[rimar2000]

Thanks for the suggestion, but decided to make a heater (salamander) with it. Here in Argentina the price of the natural gas will increase greatly next winter, and a salamander can be fueled with almost anything.

[Marsh]

Rinse it out with water and cut the bottom off. It's would make an excellent bowling ball mortar. They're a blast!
Here's an example...
http://youtu.be/JwfjdBAjx3w

[rimar2000]

WOW, that is awesome. But it is out of my budget.

[Marsh]

Really? The only expense I can see is the cost of a saw blade and a couple pieces of old pie for legs. Gun powder is really cheap and bowling balls are only $3 at a thrift store.

[rimar2000]

Thanks for your suggestion, Marsh, but I have some good reasons:

1. I live in Argentina
2. Say no more

[Computothought]

Sounds like it could be a torpedo.

[rimar2000]

WOW, that would be genial! But with wheels, because here there is not enough water...

[bfk]

Post it on ebay, take your wife out to dinner with the money:)

[rimar2000]

I think the money wil not be enough for a soda can...!

[pfred2]

I made a crucible for casting aluminum out of one. The left over I call my super heavy duty funnel. Taking the valve out was very difficult as I can recall. They really put those things in there!

I would not do this for anyone else but for you I will dig it out and take a picture of it.

Using it I found if I roll the handle around it positively locks in place for pouring. But that design element was pure dumb luck.

[rimar2000]

What a nice crucible!

Maybe I will make one of these, although 24 cm diameter seems a bit too large for me.

[pfred2]

I made it out of a very small oxidizer cylinder. The outside diameter is 13.3 cm so about half the size of 24 cm You are lucky I have two. I am too tired now to dig out the first one to measure.

24 cm may be too big. Might be good to make a casting flask out of though. There is an idea!

[caarntedd]

Excellent idea.

[pfred2]

Least then you wouldn't have to lift it with molten metal in it right?

[rimar2000]

If it is 24 cm diameter, I will need a crane!

[Winged Fist]

Maybe a portable barbecue? Something like the "Rocket Grill"?

[rimar2000]

Here in Argentina we don't use barbecue, we roast the meat over embers. I thought to make a "salamandra", that is a room heater fueled with almost anything: wood, coal, paper, plastic, etc. This would be an alternative.

Anyway, thanks for your suggestion.

[jagr60]

Hallo Osvaldo, may I ask you for more informations about salamandra? I think, thats good idea make heater for your neu workroom. :-)

Thanks Jan.

[rimar2000]

There are many shapes of salamandra. Basically, it is an iron heater, fueled whit anything: wood, coal, paper, plastic, etc.

[Phil B]

If nothing else comes to mind, you can always cut pieces from it to use as steel for other projects, even if you need to pound some of the pieces flat first.

[rimar2000]

Thanks Phil, that is a great possibility. The steel is semi-hard, and very thick.

[zavala1857]

Hola mi estimado rimar2000, gusto en saludarte, que te parece que hagas con el cilindro, un compresor de aire, si logras conseguir en la chatarra o algún taller un compresor del tipo york, al cual le pondrias un motor de 1/2 hp.
En la red existen una gran variedad, solo falta que te des una vuelta y te des una idea.
O bien lo partes a lo largo y haces un asador con tapa y chimenea, le soldas unas patas y dos ruedas para moverlo mas facil,
Un saludo y que estes bien.

[rimar2000]

Gracias por las ideas, Zabala. Estoy indeciso entre un crisol, una olla carrera y una salamandra. Hay que ver cuánto me van a cobrar para cortarlo, porque es acero grueso y duro. Con la amoladora ni soñar.

Un compresor tuve ganar de comprarlo hace unos meses, pero ahora están esas pistolas de pintar que lo llevan incluido, uno se ahorra el bulto en el taller.

[caarntedd]

A cannon.

[rimar2000]

Very good idea!

[CatTrampoline]

Make a gong, bell, or wind chime. I've seen some really nice deep-toned chimes made from discarded oxygen tanks.

http://www.instructables.com/id/Compressed-Gas-Cylinder-Temple-Bell/

[rimar2000]

Thanks for the idea, I will keep it as alternative.

[Kiteman]

Make a hank drum!

http://www.instructables.com/id/How-to-Build-a-Hank-Drum/

[rimar2000]

Kiteman, thanks for the idea but my tank have thicker walls, about 1/2 inch steel. See the point that says "working pressure 200 bar (2900 PSI)". That is a lot of pressure.