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View Poll Results: do you use flashback arrestors
Mr Safety says - ALWAYS use flashback arrestors 68 67.33%
flashback what - never need those things 13 12.87%
I use something else - please explain 2 1.98%
only on the fuel - not on the oxygen 18 17.82%
Voters: 101. You may not vote on this poll

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  #1  
Old 2013-01-30, 3:17pm
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Default do you use flashback arrestors?

do you use flashback arrestors?
I just got my Nortal mega minor
picked up two oxygen tanks
almost ready to burn a little something

I am looking at moving towards small borosilicate

so just wondering - if I need this before i light up.
I know comon sense says - "yes".

so what do you do??
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  #2  
Old 2013-01-30, 3:38pm
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I do on gas not on my concentrators
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Old 2013-01-30, 3:41pm
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you'll need them for your propane, and if you are going to run tanked oxy then you'll need one for oxy as well.
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Old 2013-01-30, 4:22pm
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Agree, use them on both when using tanked Oxy...
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  #5  
Old 2013-01-30, 5:14pm
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When I went to buy one, (propane) they sold me "check valves" which they said were cheaper but did the same thing.
Of course maybe they are the same thing & they were just having fun with me.
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Old 2013-01-30, 6:34pm
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When I got my Nortel minor torch and regulators, I was told I just needed the arrestors on the propane not the oxygen tank. Now, I'm confused. Do you really need it on the oxygen tank?
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Old 2013-01-30, 6:54pm
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There is a thread here somewhere that you should read about someone who actually had a flashback while torching. Let me see if I can find it...
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Old 2013-01-30, 6:57pm
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Here it is.

http://lampworketc.com/forums/showth...ight=flashback
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Old 2013-01-30, 7:21pm
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I have had one happen on an ox/acetylene torch before. Not fun. The gas line cracked after a Hilo ran over it. Talk about a mad dash to the gas valve. Lesson: don't use torched in an active parking lot.
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Old 2013-01-30, 7:22pm
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Quote:
Originally Posted by Eileen View Post
When I went to buy one, (propane) they sold me "check valves" which they said were cheaper but did the same thing.
Of course maybe they are the same thing & they were just having fun with me.
Wrong! Flashback arrestors will stop a backflow of gasses and they will also stop the much more serious flashback ( flame actually travelling back with the gasses). The check valves will only stop a backflow of gasses. If choosing between them, I'd go with flashback arrestors at the torch.
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  #11  
Old 2013-01-30, 7:31pm
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yes on propane, no on oxy because I use a concentrator
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Old 2013-01-30, 8:18pm
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Quote:
Originally Posted by Hangs Well View Post
Wrong! Flashback arrestors will stop a backflow of gasses and they will also stop the much more serious flashback ( flame actually travelling back with the gasses). The check valves will only stop a backflow of gasses. If choosing between them, I'd go with flashback arrestors at the torch.
Thank you Dave, I'll see about finding the flashback, don't want any flame heading back to the propane tank! (I'm on an oxycon)
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Old 2013-01-30, 8:19pm
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Quote:
Originally Posted by Moth View Post
yes on propane, no on oxy because I use a concentrator
Same for me.

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Old 2013-01-30, 9:30pm
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Quote:
Originally Posted by Hangs Well View Post
Wrong! Flashback arrestors will stop a backflow of gasses and they will also stop the much more serious flashback ( flame actually travelling back with the gasses). The check valves will only stop a backflow of gasses. If choosing between them, I'd go with flashback arrestors at the torch.
flashback arrestors are attached at the regulator in case of a hose fire, if they are at the torch and your hose catches fire your tank can still explode.
use an flashback arrestors for both propane and oxy when using tanks.
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Old 2013-01-30, 11:35pm
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Quote:
Originally Posted by Baywinger View Post
flashback arrestors are attached at the regulator in case of a hose fire, if they are at the torch and your hose catches fire your tank can still explode.
use an flashback arrestors for both propane and oxy when using tanks.
Flashbacks usually occur from a drop in fuel pressure and start at the torch, not from a fire melting your hoses. This is more of an issue for standard welding or premix torches. If you have your flashback arrestors at the regulator you could loose a lot of hose. Here is a link form Victor welding torches. The suggestion is to use flashbacks at the torch.

http://victortechnologies.com/IM_Upl...roducts%20.pdf
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Last edited by Hangs Well; 2013-01-31 at 12:41am.
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  #16  
Old 2013-01-31, 9:27am
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I use them both on my tanked propane and on my Regalia. I figured better safe than sorry.
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Old 2013-01-31, 9:49am
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OK - I will get some flashback arrestors
BUT
at the torch?
or
at the regulator?

which is preferred????

I think at the torch, but then you have so much more length of arrestor and tubing in front of you, does anyone find that to be in the way while working??

at the regulator means no blowing up if the hose would ever catch fire - but you may end up needing a hose more often.

Thoughts???
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Old 2013-01-31, 11:11am
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I've got mine at the regulator where my quick-connect fitting is. I don't care about losing 8 feet of t-hose. I care about the tank blowing up. LOL
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Old 2013-01-31, 12:02pm
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Quote:
Originally Posted by nwmud View Post
OK - I will get some flashback arrestors
BUT
at the torch?
or
at the regulator?

which is preferred????

I think at the torch, but then you have so much more length of arrestor and tubing in front of you, does anyone find that to be in the way while working??

at the regulator means no blowing up if the hose would ever catch fire - but you may end up needing a hose more often.

Thoughts???
It is really your choice. If you read the link I posted above from Victor Technologies (they make welding equipment) they recommend the torch end.
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Old 2013-01-31, 1:10pm
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i didn't think it was possible to run a FBA with an oxycon?
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Old 2013-01-31, 4:22pm
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Quote:
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i didn't think it was possible to run a FBA with an oxycon?
what is an FBA??
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Old 2013-01-31, 4:31pm
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FBA=Flash Back Arrestor
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Old 2013-01-31, 9:20pm
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I took commercial welding classes and was taught at the regulator
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Old 2013-01-31, 9:26pm
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of course I have flashback arrestors at my regulators and qd's with check valves at my torch
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Old 2013-01-31, 11:21pm
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Quote:
Originally Posted by Baywinger View Post
I took commercial welding classes and was taught at the regulator
And I was taught torch. I think your regulator and check valve at torch is also an excelent setup. What we do agree on is that you SHOULD use flashback arrestors.
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Old 2013-02-01, 1:06pm
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Quote:
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And I was taught torch. I think your regulator and check valve at torch is also an excelent setup. What we do agree on is that you SHOULD use flashback arrestors.
that we do one must avoid turning your studio into a fire bomb!
this is similar to the discussion on which to turn off first oxy or fuel lol
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Old 2013-02-01, 10:54pm
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On the oxygen concentrator no.

On the high pressure side of the natural gas line, yes.
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Old 2013-02-02, 10:33am
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Why dont folks on the concentrators? Know it wont Blow but i cant imagine fire getting to them would be good....
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Old 2013-02-02, 10:41am
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The issue is when a tank goes empty, the flame on a premix torch, can go right down into the torch and then the pressure, from the non empty tank, can push the flame front back the hose and into the empty tank.
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Old 2013-02-08, 5:23pm
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well I ordered flashback arrestors today. I got the regulator style. I figure a fire is unlikely and the main reason for these are to save your life. so - if they are ever needed - I figure I can replace the hose.
I got these from Ebay - buy me now price, under $20 with shipping
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