CO2 is better and less expenssive for brazing than nitrogen.

 
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Old 07-05-2009, 07:05 PM   #1
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CO2 is better and less expenssive for brazing than nitrogen.


Now ask me why

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Old 07-05-2009, 08:29 PM   #2
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Re: CO2 is better and less expenssive for brazing than nitrogen.


why?
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Old 07-05-2009, 10:01 PM   #3
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Re: CO2 is better and less expenssive for brazing than nitrogen.


I'll bite.

Why?
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Old 07-05-2009, 11:23 PM   #4
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Ohhhh ok, I'm curious too

I've only used CO2 in a mix for welding, but I'm willing to learn something new
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Old 07-06-2009, 12:37 AM   #5
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Re: CO2 is better and less expenssive for brazing than nitrogen.


I tell 'ya some time in the am or pm.
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Old 07-06-2009, 12:41 AM   #6
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Re: CO2 is better and less expenssive for brazing than nitrogen.


I'll be waiting for the answer to that one! It seems to me that CO is a bit more expensive than nitrogen. So whats the benefit?
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Old 07-06-2009, 12:48 AM   #7
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Re: CO2 is better and less expenssive for brazing than nitrogen.


How do you keep a hack in suspense?
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Old 07-06-2009, 03:26 PM   #8
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Quote:
Originally Posted by hvaclover View Post
How do you keep a hack in suspense?
By not telling him how silly it is to think that using CO2 rather then nitrogen as a braze purge is?
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Old 07-06-2009, 04:07 PM   #9
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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By not telling him how silly it is to think that using CO2 rather then nitrogen as a braze purge is?
Hah ahaahahahah.

Bone dry CO2 is more costly if you just consider price.

The same size tank will give you much more CO2 than nitro. You buy nitro in cubic feet and CO2 by pounds.

Now we ain't talking your soda fountain CO2 here, we are talking pure and dry CO2 as is used in welding as a shielding gas.

It's inert. That's the short version



Here's a link that proves me right

Read the left side of the second page


http://img170.imageshack.us/i/medicalgases.pdf/
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Old 07-06-2009, 04:24 PM   #10
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Thats good I just never heard of using co2 instead of nitrogen. and I aint no hack !
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Old 07-06-2009, 04:45 PM   #11
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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Thats good I just never heard of using co2 instead of nitrogen. and I aint no hack !

Not just any CO2 it's gotta bone dry pure.

Were you kept in suspense
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Old 07-06-2009, 04:59 PM   #12
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Quote:
Originally Posted by hvaclover View Post
Hah ahaahahahah.

Bone dry CO2 is more costly if you just consider price.

The same size tank will give you much more CO2 than nitro. You buy nitro in cubic feet and CO2 by pounds.

Now we ain't talking your soda fountain CO2 here, we are talking pure and dry CO2 as is used in welding as a shielding gas.

It's inert. That's the short version



Here's a link that proves me right

Read the left side of the second page


http://img170.imageshack.us/i/medicalgases.pdf/
What a pain in the butt. I have to join imageshack to see what you are talking about
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Old 07-06-2009, 05:05 PM   #13
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Quote:
Originally Posted by hvaclover View Post
Not just any CO2 it's gotta bone dry pure.

Were you kept in suspense
I can't figure out how to get your dumba$$ link to work. Does it have to do with the cost differences between medical grade nitrogen and CO2?
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Old 07-06-2009, 05:31 PM   #14
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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I can't figure out how to get your dumba$$ link to work. Does it have to do with the cost differences between medical grade nitrogen and CO2?
Naw. Back before me and you were born contractors were using Dry CO2 instead of nitrogen to braze.

It some how fell out of favor (probably because of votech teachers who didn't know better). So everybody thought nitro was the holy grail and CO2 was for hacks.

I use the Dry CO2. I pay more but I get a lot more product so I can clean condensers and blow out drains and such and still have a ot left over as compared to the same size nitro tank..
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Old 07-06-2009, 09:22 PM   #15
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Re: CO2 is better and less expenssive for brazing than nitrogen.


Quote:
Originally Posted by hvaclover View Post
Naw. Back before me and you were born contractors were using Dry CO2 instead of nitrogen to braze.

It some how fell out of favor (probably because of votech teachers who didn't know better). So everybody thought nitro was the holy grail and CO2 was for hacks.

I use the Dry CO2. I pay more but I get a lot more product so I can clean condensers and blow out drains and such and still have a ot left over as compared to the same size nitro tank..
This is a good to know alternative. Are CO2 tanks, valves and gauges compatible with nitrogen tanks, valves and gauges?
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Old 07-06-2009, 09:44 PM   #16
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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This is a good to know alternative. Are CO2 tanks, valves and gauges compatible with nitrogen tanks, valves and gauges?

Tanks have different threads so the answer is no. The CO2 pressure regulator
accommodates a standard 1/4 " gauge hose to any manifold set.

I always back flush the lines just to make sure there is no foreign matter in them.
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Old 07-06-2009, 09:54 PM   #17
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Re: CO2 is better and less expenssive for brazing than nitrogen.


thats cool i used to use co2 to blow out coils and drains but it was supplied by my employer at the time now my current employer like you said, believes that dry nitro is the "holy grail" thanks for the insight
now all I have to do is convince the boss and get him to outfit our trucks with the co2 tanks and regulators!
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Old 07-06-2009, 09:58 PM   #18
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Re: CO2 is better and less expenssive for brazing than nitrogen.


LOL...good luck. No owner is gonna be sold that easy.

But just FYI you can order bone dry co2 thru Air Gas. Make sure you ask for bone dry co2 or they won't know what you are talking about.
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Old 07-06-2009, 10:04 PM   #19
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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LOL...good luck. No owner is gonna be sold that easy.

But just FYI you can order bone dry co2 thru Air Gas. Make sure you ask for bone dry co2 or they won't know what you are talking about.

okay thats good info, thanks the boss is a pretty reasonable guy and i know he hates having to refill the nitro cylinders constantly and I agree with you that a tank of co2 can go much farther than same sized tank of nitro.
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Old 07-06-2009, 10:11 PM   #20
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Re: CO2 is better and less expenssive for brazing than nitrogen.


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okay thats good info, thanks the boss is a pretty reasonable guy and i know he hates having to refill the nitro cylinders constantly and I agree with you that a tank of co2 can go much farther than same sized tank of nitro.
Well hell, if somebody is gonna try to resurrect a much maligned but beneficial service practice it might as well be one here in MI.
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