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Discussion Starter #1
After 45 years I never had this happen and this is a newer tank also---I was working in garage welding and grinding got all done went to shut off tanks and WOW!! burnt my palm BAD! I have the shape of the round handle in my palm blistering alot---There was flame coming out of under the handle heated it up and I did not see it and it got handle HOT--

I am taking tank back tomorrow for sure,, Theres no way to adj. anything on the handle I looked, And newer tanks to boot,,

Just thought I,d post this
 

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Discussion Starter #2
After 45 years I never had this happen and this is a newer tank also---I was working in garage welding and grinding got all done went to shut off tanks and WOW!! burnt my palm BAD! I have the shape of the round handle in my palm blistering alot---There was flame coming out of under the handle heated it up and I did not see it and it got handle HOT--

I am taking tank back tomorrow for sure,, Theres no way to adj. anything on the handle I looked, And newer tanks to boot,,

Just thought I,d post this
Oh, just wonder if the tank could blow up?? I did not know weather to shut off valve with a rag or Run???
 

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Well, presumably you've shut the valve since this happen, but I suppose it was possible.

I would suggest you
-leave the tank outside until you can exchange it for another one
-you may want to get some kind of spark arrestor in your torch head, or change your procedure for closing off the valves on the torch head so flame doesn't go into the head, or try to figure out how the leak caught on fire (perhaps grinding sparks?)

It worked out not great for you (you burned your hand), but it could have gone worse if you didn't find the leak and more gas had built up in your garage...
 

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That sucks! Hope the burn heals successfully.

Maximum tank pressure is 225 psi. It's not likely to blow up, but a leak, if ignited, can sure warm up the area, as you found out. That's a really good reason to put the gloves on when closing the valve.

I use propane for cutting. It requires natural gas tips for the torch, and there is a learning curve for getting the pressure and flame set right, but it costs a lot less. A 20 lb bottle will last as long as 3 or 4 large acetylene tanks. The down side is that you can't weld with propane.
 

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You sure its a tank leak or a regulator to tank fitting not sealing? I have had fittings not seal over the years do to fitting distortion and bad tank valves. Static electricity will ignite any gas. Lets be careful out there and always disconnect and cap those tanks after each use. This may seam silly to some but if you have ever seen what damage a tank will do after the valve has been broken off even when strapped in a tank cart. Uncontrollable mini torpedo would best describe the results.
 

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Discussion Starter #6
You sure its a tank leak or a regulator to tank fitting not sealing? I have had fittings not seal over the years do to fitting distortion and bad tank valves. Static electricity will ignite any gas. Lets be careful out there and always disconnect and cap those tanks after each use. This may seam silly to some but if you have ever seen what damage a tank will do after the valve has been broken off even when strapped in a tank cart. Uncontrollable mini torpedo would best describe the results.
Its the valve for sure---Its black all under the round shape handle and theres this small slit looks like where the valve [shaft--rod] goes into the tank AND I looked under side of valve handle and seen the flame coming out of around the shaft before I got glove to shut it off, darn that handle was Hot!--Yep its valve

Heres photo I just took,,, my palm is really bad I know I,m whining but this took me by suprize
 

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Discussion Starter #7
That sucks! Hope the burn heals successfully.

Maximum tank pressure is 225 psi. It's not likely to blow up, but a leak, if ignited, can sure warm up the area, as you found out. That's a really good reason to put the gloves on when closing the valve.

I use propane for cutting. It requires natural gas tips for the torch, and there is a learning curve for getting the pressure and flame set right, but it costs a lot less. A 20 lb bottle will last as long as 3 or 4 large acetylene tanks. The down side is that you can't weld with propane.
Check out the photo,,I do use propane also have torch and oxy. hose set up for both.
 

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Whining about something like that is understandable. Sorta puts a lot of projects on hold with one hand out of commission.
 

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Re: Acetylene Tank Valve Leak [photo]--burnt hand

Good thing it was only a burnt hand!!!
Do you have check valves at the torch handle? If not, it may have been that and not the bottle.
 

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Discussion Starter #10
Re: Acetylene Tank Valve Leak [photo]--burnt hand

Good thing it was only a burnt hand!!!
Do you have check valves at the torch handle? If not, it may have been that and not the bottle.
Yep I have flash-back [check valves]
 

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Re: Acetylene Tank Valve Leak [photo]--burnt hand

Surprised you couldn't smell it leaking. Had hoses at fittings, o rings in the tips and fire burning inside the tips, but never a cylinder leaking. The valve is supposed to be turned out full to seal, but the stem packing nut should take care of that. I would tighten the stem packing nut. Most our acetylene need a square wrench rather than a round handle
 

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Discussion Starter #12
You sure its a tank leak or a regulator to tank fitting not sealing? I have had fittings not seal over the years do to fitting distortion and bad tank valves. Static electricity will ignite any gas. Lets be careful out there and always disconnect and cap those tanks after each use. This may seam silly to some but if you have ever seen what damage a tank will do after the valve has been broken off even when strapped in a tank cart. Uncontrollable mini torpedo would best describe the results.
And I do have flash-back [check valves] on torches too so it was grinding spark is all I can think of.
 

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Discussion Starter #13
Re: Acetylene Tank Valve Leak [photo]--burnt hand

Surprised you couldn't smell it leaking. Had hoses at fittings, o rings in the tips and fire burning inside the tips, but never a cylinder leaking. The valve is supposed to be turned out full to seal, but the stem packing nut should take care of that. I would tighten the stem packing nut. Most our acetylene need a square wrench rather than a round handle
I thought that too but theres no packing nut I can see? just this small rectangle slit on side by the bottom of valve by tank
 

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Re: Acetylene Tank Valve Leak [photo]--burnt hand

Surprised you couldn't smell it leaking. Had hoses at fittings, o rings in the tips and fire burning inside the tips, but never a cylinder leaking. The valve is supposed to be turned out full to seal, but the stem packing nut should take care of that. I would tighten the stem packing nut. Most our acetylene need a square wrench rather than a round handle
Incorrect!

Oxygen bottle valves need to be fully open to prevent the pressure from getting behind the valve disc and jamming it so that it can't be closed.

Fuel gas valves are to be opened no more than 1/4 turn so that in an emergency, the fuel gas can be cut off with a flick of the wrist.

The difference is in the relative pressures, 2200 psi for oxygen and 225-250 psi for fuel gasses.

Don't think that that is open enough? I run a 40K BTU heating torch with the propane valve usually open less than 1/8 turn, the same as for the 60K BTU barbeque. Cutting torches use a lot less fuel gas than heating torches or appliances.

Acetylene, natural gas, and propane all come under the general heading of fuel gases.
 
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Discussion Starter #15
Re: Acetylene Tank Valve Leak [photo]--burnt hand

Incorrect!

Oxygen bottle valves need to be fully open to prevent the pressure from getting behind the valve disc and jamming it so that it can't be closed.

Fuel gas valves are to be opened no more than 1/4 turn so that in an emergency, the fuel gas can be cut off with a flick of the wrist.

The difference is in the relative pressures, 2200 psi for oxygen and 225-250 psi for fuel gasses.

Don't think that that is open enough? I run a 40K BTU heating torch with the propane valve usually open less than 1/8 turn, the same as for the 60K BTU barbeque. Cutting torches use a lot less fuel gas than heating torches or appliances.

Acetylene, natural gas, and propane all come under the general heading of fuel gases.
Tudor you surprise me at times--I agree but when you watch these shows on TV when there using torches they open them ALL the way?? [Wrong] I was taught in school to open little like you said but they must have forgot that part now-a-days???
 

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Re: Acetylene Tank Valve Leak [photo]--burnt hand

Tudor you surprise me at times--I agree but when you watch these shows on TV when there using torches they open them ALL the way?? [Wrong] I was taught in school to open little like you said but they must have forgot that part now-a-days???
Yeah. I learned the same at both an industrial cutting/welding course and a government gasfitter certification course when working as a tradesman in heavy industry.

In the TV shows, are they using bottles or a manifold system? That will make a difference. The gas supply valve for a manifold system is a 1/4 turn open or close valve, the same as for a residence using natural gas. The user ports on the manifold are opened all the way to ensure sufficient gas flow for the appliance.

Keep in mind that while the supply valve for a manifold system may be wide open at 1/4 turn, it is supporting several appliances, each with their own demands for gas flow. The objective of using a 1/4 turn valve is still speed in shutting off the gas flow in an emergency when time may be critical.
 

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Discussion Starter #17
Re: Acetylene Tank Valve Leak [photo]--burnt hand

Yeah. I learned the same at both an industrial cutting/welding course and a government gasfitter certification course when working as a tradesman in heavy industry.

In the TV shows, are they using bottles or a manifold system? That will make a difference. The gas supply valve for a manifold system is a 1/4 turn open or close valve, the same as for a residence using natural gas. The user ports on the manifold are opened all the way to ensure sufficient gas flow for the appliance.

Keep in mind that while the supply valve for a manifold system may be wide open at 1/4 turn, it is supporting several appliances, each with their own demands for gas flow. The objective of using a 1/4 turn valve is still speed in shutting off the gas flow in an emergency when time may be critical.
Yep--I agree 100%-- I took that tank back today and talked with guy in charge he started giving me some say static about situation so I caught on and told him my hand will heal up all I want is credit for the gas in that tank and a new one so I can get on with what I,m doing. He change his whole tone after that--Think he thought I was going to sue him or something??
 

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Re: Acetylene Tank Valve Leak [photo]--burnt hand

Incorrect!

Oxygen bottle valves need to be fully open to prevent the pressure from getting behind the valve disc and jamming it so that it can't be closed.

Fuel gas valves are to be opened no more than 1/4 turn so that in an emergency, the fuel gas can be cut off with a flick of the wrist.

The difference is in the relative pressures, 2200 psi for oxygen and 225-250 psi for fuel gasses.

Don't think that that is open enough? I run a 40K BTU heating torch with the propane valve usually open less than 1/8 turn, the same as for the 60K BTU barbeque. Cutting torches use a lot less fuel gas than heating torches or appliances.

Acetylene, natural gas, and propane all come under the general heading of fuel gases.
You are 100 percent right. I use them everyday and never more than crack the acetylene, don't lay on side or drop them. Brain is slow at times. We use so many different compressed gases different rules apply to all. Some have to be layed down to work, upside down or used upright
 

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I was just going to chime in on the valve being fully open being incorrect. The oxygen tank is a double seat valve where the fuel tank isn't. In my 50+ years of using a torch almost daily I have never heard or witnessed a leaking tank like described. The OP for your burn try Foley ointment. It is the best I have found for a burn like that. You were lucky this round. There is a reason it is recommended to use soapy water when first installing and pressurizing a torch set up.
 

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i have heard of an acetylene tank blowing up on a ship and going out the side and sinking that ship and several others in the harbor skipping across the water like a torpedo that's why it sticks so you could smell it.
 
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