Lighting and shutting down an oxyacetylene torch
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- เผยแพร่เมื่อ 2 ต.ค. 2024
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This video demonstrates the proper procedure to light, set proper flame and shut down an oxyacetylene torch.
DAMN... inconsistent information....... this is what i heard: 🔥🔥🔥Fuel on first........ Fuel off first.🔥🔥🔥 Here, this instructor says differently..... whom to believe? And WHY? If anyone wants to answer, must describe/ explain WHY.
I have the same question!
I've heard so many contradictions on this topic. I've done both with no problems. Granted, I don't do it as much as some do it every day. I think if anything, we need to look at the times where problems happen when shutting off the oxy-acyt and see what caused it and go from there. Seems like if there is no leaks or faulty equipment, then it doesn't matter since both ways are always recommended.
"Long ago in a galaxy far, far away..."
To all you arguing about proper shut off order, RTFM. Only the manufacturer is going to know whats best for their equipment. Some of them want you to do O2 first, some want the fuel off first. Do what they say. If you don't want to read the manual please get an office job, you should not be working with tools that can kill or injure other people or pets.
So which really is the best way to cut off the gases for a oxy-acyt torch? I've seen both recommended, which would lead one to believe that it doesn't matter. But then I hear about the times where it does matter and bad things happen with improper shut off. So which is the right way?
"shut off acetylene first. Turn it on first - turn it off first."
This is what I was told just a few days ago by my instructor. Also the proper shut down procedure can be read in "how to weld" by Todd Bridigum, this also says to turn off the fuel gas first.
Red Beard fuel on first........ fuel off first.
I agree with you. That’s the method that I follow as well. Let’s say your torch does not come with flash back arrestors, by shutting off the acetylene valve first, you eliminate the chance of the flame burning back to the tank. Simultaneously, you have oxygen blowing out the tip, thus, restricting any possibility of a flame burning past the torch tip. Perhaps the person in the video has flashback arrestors?
@@realWhy-not-DIY what I been told … if you are working with large tips , you are going to get a pop if you turn off the fuel first .. A before O except when you turn off .. then O before A .. with smaller tips it not matter as much .. but oxygen should be off first.
That’s what I have heard. I not have a torch yet , suppose to come tomorrow lol
Just saying.
@@lisalovelylpa interesting. You're absolutely right about the popping sound when shutting off the acetylene first. I've also heard of the shutdown method you described. I guess, as long as we don't blow ourselves up, then either way is good. But all jokes aside, I've shut off the torch both ways with no issues.
This is the correct way to logically shut down a torch, oxy 1st, as it is the opposite way of turning on a torch and if the fuel is turned off 1st the tip flashbacks making a pop and the oxy is left running with no flame indication and could be overlooked and left running.....
Craig Diamond Interesting... I got my Gas Welding Plant some 27 years ago in 1988. I remember that I read 'thoroughly' the instructions, however, I've read them again recently and it says to turn the fuel valve off first! I, however, have ALWAYS done it the way it's mentioned in this video by turning the Oxy off first! I have no idea how I got into this habit (unless it was a mates father who told me many years ago) but, I see things exactly your way and I've never come to grief. If the acetylene is happily burning by itself when you light the torch up then it should happily burn on it's lonesome when you shut the torch down!
Well, there is a good reason why its recommended to shut fuel first. In case of tiny leakage of fuel valve on the torch, if you close oxygen first, then fuel, there would be small flame burning within the torch (inside) and might cause fire. If you close fuel while oxygen still running, it extinguishes the flame.
@@adamelektronik21 The manual for my Victor torch states to turn off the oxygen first, explaining that turning off the fuel first can cause a backfire witch sends soot back through the torch and can interfere with the arrestors and check valves. Running the oxygen to blow out the fuel gas, only works with the oxygen side of the torch, there will still be fuel gas in the fuel side of the torch, most of which will burn off when you shut off the valve.
I like the super epic Star Wars intro haha good video
So are we, and we're happy to help. I've sent you a message with contact information for our rep in France.
Thanks for a great detail education, better and well done more than Victor's education on TH-cam.
Is it the more the gas valve is opened the more pressurized the flame will be when oxygen is added?
tntboyz1602 technically. since more gas is being pushed out, it should be more pressurized
properly close the acetylene and then oxygen
Great video. Thanks for the advice. I learned something. I always tried to light the torch with both gases open. This is way better.
wow complete opposite from what I was told. Kind of strange how you shut off the oxygen first. I was told Oxygen after acetylene because oxygen cleans whatever left at the tip of the torch head
Kyle Whitney just go in alphabetical order a (acetylene) goes before o (oxygen)
@Waterman117 yea thanks for that info im still in school im only 14 so all the help i can get is great
Hi. So after 10 years how’s your welding?
@lpngcf420 i am taking a welding course, and current thought is to shut off the fuel first and then the oxygen, just like you said. according to my instructors, what this guy said is old school.
i like to turn off the gas first so that the oxygen will blow out the gas in the torch
First video
th-cam.com/video/CXkgA_QLIJQ/w-d-xo.html
Second video
th-cam.com/video/rJ1GlyHRK4E/w-d-xo.html
I’ve seen 6 videos about this and they all do these differently. 😢
Pay attention to how he shuts down the torch. THIS IS WRONG. page 5-15 in the Airframe VOl. 1 handbook published by the FAA on welding and how to turn on and off an oxy acetylene torch, you first shut off the acetylene and then the oxygen. Cutting the oxygen first leaves you with a large flame and could be potentially dangerous.
Thanks so much for the tip, also this video is broken on the "Harris Products Group" website, have your webmaster look into it pls.
Thanks for letting us know - it's been fixed.
Get some smoke while doing HVAC inside a customers house and end up with parachutes floating everywhere... then the noobs try to wipe them off the freshly painted walls with a rag or their fingers and it's not a good day.
Many thanks, but I'm in France !
Hello, I just bought an entire Harris OxyAcet welding & cutting, mixer, regs and tips. The welding tip size I got is 5 and cutting tip size is 0. Can you recommend the width variation for each? i.e. welding tip 5 can weld 1/16 to 1/4 etc.., since at this time I cannot purchase another size(s) of either. I am very impressed with Harris equipment and after setting everything up and checking with LeakTec there have been NO leaks and no change in tank pressure after 12 hours!! If you ever need a woman welder to "sponsor" :) let me know!
Instead of your voice competing with the heavy hiss of the torch, this video should have been overdubbed.
How come it didn't go 'POP!' when you turned the Acetylene off first?
@Waterman117 the idea is that you want a flow of oxy to blow out any acetylene in the torch and blow any spark outward, preventing flashback through the hose.
Does harris make and sell any injector based welding tips like AGA? Are the startup and shutdown procedures for those different?
This guy has it wrong, I'm surprised he hasn't blown himself up yet, I do this every day in metalshop and have been told very insistently that it is A before O or up we go! Always turn on acetaline before oxygen and always turn off acetaline before oxygen
That varies from manufacturer to manufacturer.
@canals22 these questions are difficult to answer without knowing more details about your particular setup - fuel gas, brand of equipment, tip size in BTU value, size of cylinder, ambient temp., etc. If you can send us a message with your geographic location and contact information, I can put you in touch with one of our technical reps who can give you the best answer for your environment.
Thank you for your video which brand of torch is better and from where we can bought it ?
well arent you supposed to blow the flame off the tip then bring it back to adjust it? and just crack the acetylene when u light it then adjust your flame... and turn on your preheat to make a neutral flame??
This is not recommended. In an oxy-fuel setup the oxygen is doing the work and it needs to be high-purity oxygen (99.5 percent minimum) in order to be effective.
i watch aircraft tube welders, their torch is quiet.
This ain't a welding torch it's a cutting torch.
This particular video adheres to USA standards per OSHA requirements. BS EN standards may differ and may teach different methods. If you are unsure, it's best to check on what your local standards dictate.
I've always wanted to know what the flame would look like if instead of an oxy tank, you connect an air compressor to the oxy inlet ? I've never worked with a torch, but I have seen a lot of them in use. I guess it will just blow it out.
Why? Atmospheric air is only about 21% oxygen so what's the point? Not enough oxidizer for the fuel gas and you're also introducing impurities and relatively inert gasses (Nitrogen, predominately, though not technically a noble gas.).
Yeah, it makes perfect sense now, since this was way back when and I've learned a lot since :)
@Waterman117 lol damn no the age limit is lower tho 18 HELLA YEAAA
@sparklerbombg No, that would be very dangerous and explosive!
will i be able to melt metal with this as well?
3:21 😂
Helpful for a beginner.
great video, nice to watch a video by someone that knows what they are talking about.
You should always turn off the gas first
There are different schools of thought on this, but it is taught now to do as was demonstrated in this video; Turn on torch=Fuel Oxy, Turn Off torch=Oxy Fuel. One reason is mentioned by another poster is that Oxy can be accidently left running as it has no sound or smell like fuel gas, also it can travel easier into the Acet side due to the pressure which Acet doesn't have like O2. Thats what I was taught a couple years ago in my welding class anyway.
Always turn off oxygen, the thing that explodes, first.
I was taught A before O or up you go. The logic I thought was because the oxygen expels from the nozzel at a higher velocity so there is less chance of it to backfire instead of the acetylene which stays in the line after its shut off.
thanks
Dope
Thanks for the good lesson. I just got a job where we use a big torch to heat parts for assembly, these are for the naval industry.
Most people here are not experts, everyone has their system, so I would like to know how to adjust a flame for heating, and how I can tell when a gas is running low.
Many thanks.
Check the tank, each tank should have two gauges, one for contents pressure and one for hose output pressure. When the tank contents pressure drops to low you'll know.
Thank you so much you save me
@quebrik hahah yea
Oxygen methane?
I've been told the same thing!
Will I be able to melt steel beams with this?
+CrashTestFetus need jetfuel for that
Hah
good ,glad to see you are doing it right by shutting off the oxy first then the fuel
Thank you so very much!
starts at 0:48
your shutoff method is wrong...
Dude you're awesome, thanks for the tips!