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OT,,Propane v acetylene???

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10-04-2006 13:35:47

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Whats the diff using theses two types of gasses with a torch? When would you use one or the other?
Thanks
Stan

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buickanddeere

10-04-2006 19:57:00

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

For cutting once the metal is up to temp. You can pretty much shut off the acetylene or LP and keep cutting. For welding or brazing acetylene wins hands down. For general heating I use a plain cheap Benzo-Matic Turbo something or other torch with a 3 ft hose. Uses no O2 tank and just a BBQ LP tank. Cheap heat for pre-heating welding jobs, soldering, melting ice, heating some rusty stuck nuts/bolts etc. As for myself? A proper Oxy-Acetylene torque and the El-Cheapo Benzo-Matic LP torch. LP and oxygen only? Good but not great.

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Ih2444

10-04-2006 19:03:31

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

Used em both, Have been using propane lately because of acetylene tank cost.

My observations. Propane:
You will use more oxy.
special tips are required,and cost more.
Not as hot and longer preheat times for cutting.
Tips are a bit harder to clean.
Cannot weld with Propane.
Safer to use and transport, Can run over 15 psi on torch without becoming unstable.
Tanks are cheap and last a long time per fill.

Acetylene:
Costs more overall than propane
burns hotter and less preheat time.
Can weld with acetylene.
Uses less oxy than propane.
Tanks are high in cost.
Is not as safe to use and store as propane.
can weld with acetylene.

Both will cut fine with the right tip.

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Jeff in TX

10-04-2006 17:14:49

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

petrogen

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doogdoog

10-04-2006 19:07:06

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Re: OT,,Propane v acetylene??? in reply to Jeff in TX, 10-04-2006 17:14:49

Aloha Jeff, I looked at the link that you provided and it looks pretty good. Did you try it?? I wonder how the gasoline is turned to a gas? Well, thanks again for the link.

Mahalo,
doogdoog

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thejdman01

10-05-2006 05:33:55

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Re: OT,,Propane v acetylene??? in reply to doogdoog, 10-04-2006 19:07:06

I have a petrogen the big guys use it (cutting big stuff local scrap guys etc wokrs excellent key is to keep fresh gas. Still cant braze with it though

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Dachshund

10-04-2006 16:03:51

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

Used them both, borrowed the both, owned them both. I went back to Acetylene. In the long run, I wasn't saving anything with propane. Propane cost was less than Acetylene, but you use more gas, cuts slower and I just generally didn't like it. Didn't matter if it was my own rig or the several others I've used.

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UncleTom

10-04-2006 15:23:13

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

I have both propane and acteylene. I prefer acteylene for most cutting. We use propane for scrapping. I like to gas weld occsionaly and you cant do that with propane as it gives off water as a by product when it burns i have been told. Works good for brazing and soldering though.

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glennster

10-04-2006 14:59:29

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

i have both acetylene and oxy propane cuting torches. the propane is by far much cheaper to run. oxygen pressures on acetylene for cutting will run anywhere from 30-45 psi. propane you can cut at 10-15psi. propane is a little cooler flame, but once you get the metal hot, it cuts the same. i have tips for propane that cut up to 2" steel, and they fit on the little victor cutting heads. you can also use the little gas grille tanks, they are easy to carry around.

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Nebraska Cowman

10-04-2006 14:26:36

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

I went to propane cuz it was going to cost me several hundred dollars to get a new acetylene bottle.

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Gerald J.

10-04-2006 13:44:02

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Re: OT,,Propane v acetylene??? in reply to SJ, 10-04-2006 13:35:47

Propane is cheaper but burns cooler. Ok for soldering and brazing, not good for cutting and welding. Acetylene works for all these processes but can be hard to control for soldering.

Gerald J.

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RodInNS

10-04-2006 14:50:37

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Re: OT,,Propane v acetylene??? in reply to Gerald J., 10-04-2006 13:44:02

I must be doing something wrong. I've been using propane now for 3 or 4 years. It works quite alright for me. Turn the gas pressure up closer 15 psi. Cuts pretty much the same as acetylene...

Rod

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RustyFarmall

10-04-2006 13:59:57

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Re: OT,,Propane v acetylene??? in reply to Gerald J., 10-04-2006 13:44:02

Not questioning what you just said, but if propane is not good for cutting, then why do all the scrap iron guys have their torches set up with propane instead of acetylene?

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John T

10-04-2006 13:57:40

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Re: OT,,Propane v acetylene??? in reply to Gerald J., 10-04-2006 13:44:02

Gerald, I been runnin propane for years and normally use the small tip for 1/4 inch or so cutting but can cut 1/2 inch if I change to the bigger tip. The problem, however as you note, is it takes a lil longer n more preheat and the pressure settings are more critical VERSUS with my old acetylene you just pick her up n regardless of steel size or pressure settings chop right through 3/4 steel wooooo hooooo oo. I can cut n slobber my way through most steel even 1 inch eventualy buttttt ttt a good torch man with the right sized tip n pressure settings can cut steel so smooth n even it looks like its been sawed through buttttt t nottttt t meeeee eeeee

John T

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10-04-2006 13:49:57

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Re: OT,,Propane v acetylene??? in reply to Gerald J., 10-04-2006 13:44:02

Thanks

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