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Tool Talk Discussion Forum

Re: fuel tank repair

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Stick welding

04-21-2013 12:26:59

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How many argon fire extinguishers do you see? Argon is very expensive. Nitrogen is a common purge gas.

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Dave in Tx

04-22-2013 20:29:19

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 Re: fuel tank repair in reply to Stick welding, 04-21-2013 12:26:59  
Another thing about argon....I weld lots of tanks, both gas and diesel. I rarely take the fuel out of them. I purged a gas tank one time with argon cause I was out of my usual one. Gasoline will burn in a tank using argon. It won't blow but it will burn. I use co2 exclusively. Please, Please don't ANYONE do this without the rest of the schooling to know how. It is a process you must know in the correct order to be safe at it. A one quart empty gas tank off a lawn mower will clean a work bench and the stuff hanging on a wall. You MUST know the order in which you can do this!!!!!

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dr sportster

04-21-2013 18:51:05

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 Re: fuel tank repair in reply to Stick welding, 04-21-2013 12:26:59  
Well I didnt' know there was a fire extinguisher that blew out nitrogen .I would reserve the fire extinguishers for putting out fires. Alot more welding shops have argon than nitrogen. Just curious as to why you said not to use argon. I had nitrogen to run air tools and fill tires at one time and the gauge cost 400 bucks so I think argon is cheaper if you don't have nitrogen.Filling the bottles was about the same cost.

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Stick welding

04-21-2013 18:57:14

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 Re: fuel tank repair in reply to dr sportster, 04-21-2013 18:51:05  
I sell welding gasses. Nitrogen should be way cheaper than argon. I toured a 150 million dollar air separation facility. They said as long as they can produce argon, all the oxygen and nitrogen is pure profit. CO2 is used to put out fires, argon won't put out a fire. Nitrogen is dry and cheap. That's why it's used for purging.

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dr sportster

04-21-2013 19:22:10

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 Re: fuel tank repair in reply to Stick welding, 04-21-2013 18:57:14  
A tank purged with argon is the same thing as a tank purged with nitrogen . You are still not saying why you told the original poster not to use argon. As I posted not many welding shops have nitrogen but most have argon. So why did you tell him not to use argon?

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