Oxy Acetylene Brazing, Torch Adjustments- Reducing Flame, Oxidizing Flame, Neutral Flame
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- Опубликовано: 13 янв 2019
- I show the Reducing Flame, Neutral Flame, and Oxidizing Flame for Oxy-Acetylene Brazing of Copper Tubing. The Reducing Flame is also known as the Carburizing Flame and I show it with a Black Background. Supervision is needed by a licensed HVACR Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety. Flashback arrestors can be added to the base of the handle where the hoses connect and at the tank regulators.
Tools Used In The Video
Uniweld Cap-N-Hook and #2 Tip Oxy Acetylene Torch Setup- amzn.to/2STp3Fe
Ameriflame Oxy Acetylene Torch Setup #1  Tip- amzn.to/2SRm3JF
#2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD
Cap-N-Hook Tip for Oxy Acetylene Setup- amzn.to/2MbhpUk
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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If lots of instructors were as knowledgeable and instructive as you go about teaching, many of us young technicians would surpass the level we're at now, hence we're hocked to your channel because we know there's lot more stuff to know and the right way to execute them.
I really appreciate your comment Vjn! Thanks!
I work with a friend of mine as a helper and we been doing lots of rough ins for the past two weeks and I decides today to take the kit home and start practicing my welding I have never weld before im exited for it and I have all I need but the knowledge even doe my friends explained it but you gave me more confidence to do it .
@@rafaelrodriguez172brazing***
Ever move up from being helper?
This man makes it look easy! First time on a torch and its hard adjusting. SO much going on with hearing the pops and the noise of the flame... Always fun with 15 other students in the class making all the same mistakes! Thanks for the video!
I just joined an HVAC company with a tankard plumping knowledge and basic sheet metal work and advanced electrical knowledge. I no brazzong experience but understand the concept but this video filled In all the theory on every question I had on the very nuances of oxy/acetatyln setups and brazing. I absolutely subscribed and thank you for sharing your knowledge
Great insights. Avoiding the black smoke was a mystery until now. Thanks!
Thank you for this find! Just made my brazing life with my Oxy-Acet torch a lot easier.
As always very clear explanations and to the point I start with a new company soon and they use oxy/Acetylene. I've been in the business for 20 years and have only always used and a B tank for any torch work that I've done. So I was thankful for your brief explanation on how to set up check.
Best video on this topic that I've seen. I've watched MANY. Thanks!!
Excellent continuation of the previous video. This format gives me a whole perception of the question. BIG thank you. Really important helping tips.😀
Thanks a lot Tapch MC!
Excellent video. Exactly what I wanted to know about the flame type and reasoning behind it. Quickly covered the basics, and mentioned tip size.
Thanks Fred!
The best explanation i have seen so far .
Comprehensive. Been in the field for five (5) months and this was the most digestible description yet. I’m green as can be. Thank you.
How’s it been going
Im a new lead tech this video helps tons thanks a lot bro.
Thank you for making this so simple!
Glad it was helpful!
Thanks for the instructive video. Great stuff.
Turning on the Oxygen a little and then the Acetylene is just genius. I always turned Acetylene on first got the soot and then adjusted. Also, I was always taught to use a neutral flame not the reducing flame. Looks like the Teacher taught the Teacher. Great job!!!
Anything from neutral to reducing can be used but yeah usually reducing, thanks Teacher Lynn!
Thank you for the video. Very informative
Thank you for your educational videos, you’re top notch! I started an hvac business less than a year ago and your videos have helped me on my journey so far
Awesome to hear, thanks Paul!
Great video with a lot of explanations!!! Thank you
Thanks Dimitri!
I always learn something important with you. Thank you so much
Glad you enjoyed. Thank you for your support!
Thank you for another practical video.
Glad it was helpful!
As always great video. I’d recommend, after turning on acetylene, reversing the service wrench, and leaving it on the acetylene tank. Makes it much easier to turn off in case of an emergency.
Good job man I like the information is very helpful
thanks for teaching
I’m practicing brazing right now with a setup I just purchased.
60cu.ft Oxy / B Acetylene tank.
Harris 510 HD torch outfit which has Harris #5 brazing tip and also came with a Harris 1AC- 2 piece cutting tip with oxygen lever.
First time taking the braze tip to the 3/4acr and elbow it blew a hole right through in about 2 seconds flat with a reducing flame. The second attempt and beyond it looks as though the joints were fully sealed visibly with the 15% silver braze rods, but it still seems as though I may have over heated them- if that’s even possible.
I’m still practicing before I have to get it right on a project.
Actually I had success easier at first with the high preheat cutting tip without pressing the oxygen level of course.
bro your teaching style surprise me, i love it.
Lots of love from Bangladesh.
Thanks a lot havey duty!
Thank you for all your videos you are a monster and a good master to appreciate that
That is what my wife says my face looks like when I wake up, ha ha, Thanks Victor!
Thanks man appreciate the video your good people.
Nice and easy to learn. 👍👌
Glad you think so!
You are very welcome.
Nice explanation “ practice makes perfect “
Thanks David!
Nice informative video 👍.
Great video memory refreshing thank u
Thanks ejohnfall!
Subscribed! Thank-you!
Thank you for the video.
Thanks a lot Ray Ray, always enjoy your comments!
perfect video thank you so much for sharing your knowledge Sir!!!
So nice of you
@@acservicetechchannel you are most welcome Sir 👍
Great HVAC teaching
Thanks Luis!
I’ve been brazing for a couple years. Wont say how many because I’m embarrassed all my stuff is always in order. I learned how to braze with that exact setup with a pegged acetylene tank gauge my other gauge broke off yest on my acet manifold and I had to get a new one and had no earthly idea what pressure they needed to be on……..thank you for my otj training for today
And I’ve sweated a lot of copper and always went by look and sound. I can’t believe I was today years old when I learned how to properly adjust them 😂
I prefer using a Turbo Acetylene torch over the Oxygen-Acetylene Torch but this was a very good informational video, there was stuff I didn’t know👍
I use both myself and yeah a Turbo Torch will do it too, thanks Superior!
Very nice information
Great video, thanks for posting! I would like to note one thing though - I know for cutting torches, all the big torch manufacturers recommend killing the oxygen first, then the fuel gas to make sure the line and valve are purged of any soot and close fully. I don’t think it matters too much, but they do take the time to say do it this way so maybe it does matter? Idk. Thought I’d be that annoying guy in the comments and mention it at least.
Also, I remember my dads old brazing torch tip had the psi stamped on it but my new smith tip says MW205 and no psi mark. Do they not do that anymore or is the 205 some sort of code that corresponds to pressure settings?
I finally suscribed. You sold me.
Ha ha, thanks Vladek!
Thanks 👍
Thanks for answering my question about why the heck is my flame so dirty when I open my torch, lol, and the poping noise!😅
Thanks for sharing
Thanks Tak 293
Good info.
Great info!
Thanks Alex!
So awesome
Excelente muy bien Gracias
Great Video ...
Thanks!
Black smoke is an indication of the acetylene flow. If the gas flow is lower than the flow of flame it may mean the flame enter the hose. That is why I would not use the oxy first. You open the acetylene and increase untill the smoke dissapers and that tells the flow is ok.
Hi is this type of oxy acetylene kit suitable for Size C bottles? Im from Australia and the smallest bottle here is what they called size C
I like using map for the 3/8 line and oxy acetylene for the 7/8s
He had the perfect flame when you have to add more oxygen in order to shut it down mean you had the perfect amount of gas and oxygen mixed having to add more oxygen inorder to shut down the gas to avoid the pop good video taught me alot
Cristal clean explanation. Thanks :)
Thanks a lot Juan!
Hats 🎩 off for you Sir !!!
Thanks Thomas!
awesome!! Thanks again!!
Thanks Alexander!
👍 I have a channel also check it out share and subscribe just passed 100 subs
Love it!
Thanks Electric Boogie!
I know you don’t want to produce black soot, but lighting the torch with both valves open is very dangerous. You can have a flashback in the hoses, that sounds like fire crackers going off. They are small explosions in the rubber line and will end up back at the regulators. You will then have a fire with rubber, oxygen, and acetylene burning together, making thick black smoke. I used to light my torches like that all the time until one day I had a flashback and fire at the very large tanks. This was in a multi million dollar computer room, and shut down operations for several major credit cards. I was told by the regulator manufacturers rep never to light my torches like that again, and we were required to install flash back arrestors on all torches after that. I agree with everything else you presented. I think you covered all the bases.
I feel like the Turbo Torch is the Oxy-Acetylene torch with training wheels. It doesn't work quite as well as Oxy-Acetylene, but if the tech has limited skill or experience, the Turbo Torch is a lot more forgiving and easier to use.
Turbo torch will certainly work and is easier to use for sure, thanks douglas787!
I agree with you 100%
Turbo torch will make you go deaf. Main reason I didn't buy one.
I just bought a old setof tanks,similar to what you have and it came with a vintage torch head. Detroit L-45 is the model. It has a locking lever on the handle that allows gas flow. I have no idea how to use it. What is it for? A gas saver maybe? I have not tried it yet but it is a strange torch head. It cant be a cutting torch. Im confused.lol
Turn the oxygen bottle on slowly while not looking at the gauges in case they burst. Then fully open to set the valve back seat to so it closeS properly .
Always make sure regulators are turned out.
I was taught for brazing to set the ace at 7 and the oxy at 11 without running the gas.
I always start the ace only and then the oxy.
Turn the oxy off first in all cases.
Never start you torch next to the tank.
Never breathe brazing fumes. Use a carbon filter mask.
I clear the lines when finished oxy-acetlene cutting, I don't back off the regulators, a old timer welder told me that would ware the diaphrams in the regulators. Always double check both tanks are shut off. Tanks should be transported in up right position, and strapped down so they can not be tipped over on it's side.
Thanks
I always set my gas pressures at 5 and 10 but i just realized uniweld states to. use a 5 and 5. Is there any significant differences in doing so?
Good job 😜
Thanks Phillip!
Very good
Thanks Samuel!
Awesome🤙😎
Thanks
Is it possible to make a flame smaller than what naturally wants to come out at the recommended manufacturer pressures?
Thank you but First, I did not see where it said that the UEI DL479 also came with a temperature sensor. Second, I do love the looks of the Fieldpiece ST4 and do you have videos on that. Perhaps I could buy one for the class and use your videos to teach from. But I do want the UEI if it has the temperature sensor or do I have to buy that seperate?
The DL479 comes with a temp sensor. It should say it in the "included components" section. Look up "acservicetech ST4 Calibration" Video or some of the newer refrigerant charging videos, thanks Teacher Lynn!
what part of the reducing flame do you use when heating up the tubing? middle flame or the outer flame cone?
Thanks for this! I have been installing new split systems for about 7 years but haven't had to do brazing, apart from once in training years ago. Now I have the tools and want to practice so I can change a compressor, for example. Very informative. Interestingly another RUclips video said you want a neutral flame for brazing copper pipe, you say reducing flame... Does it make a difference how big the pipe is, because in that other video it was like 1" or so. I'll be working with 1/2", 3/8". or 1/4". Thanks!
Actually the length away will determine how much heat you put on the copper so I couldn't really tell you how close. Around 1 to 2 inches for brazing and then maybe out to 3" for crowning the joint at the end. Practice is the key, thanks and you can use anywhere from a neutral flame to a reducing flame but I think a reducing flame gives more control, thanks
@@acservicetechchannel I like neutral flame which both gases mixed together, just a thought .
a textbook would say neutral flame just for the sake of consistency of heat I think, but if you are going to be working on joints that small and you are a beginner I don't see how using a reducing flame to get the hang of things would hurt you. just make sure you get that silver solder to commit to capillary action and sweep your flame across the joint to ensure penetration. I think you'll be doing fine in no time.
It’s safe to say you braze in the perfect setting or else I could see everything around that flame catching 🔥.
Please comment on other brazing options like using LPG / butane alone. Thank you.
Just curious why this torch don't have check valve or flashback arrestor on the handle or regulator?
How much capacity is a stalin cylinder full for uniweld MC cylinder at KG unit
Hi. Thank you for the content. I am attempting to convert from r22 to mo 99 and replace the compressor. I have a split system. Can you recommend a list of your videos in order of process then i can follow your guidance exactly as needed?
I just have 2 videos on checking the refrigerant charge on a MO99 system that has been converted. I am finishing up a book that would help but it is not published yet. You could check out "acservicetech full recovery" "acservicetech full vacuum procedure" thanks
Thank you Sir
how long can you use the torch on a neutral flame setting before you have to refill the tanks?
Can I use mc tank with b turbo torch I was told that I could damage my turbo torch by using mc tank instead of using b tank ?
Could the Lincoln Port a Torch do the same as the uniweld?
Man out here its new tanks every other week, never checking leaks, using a lighter instead of an igniter, no gloves, no eye protection. Never adjusting the pressures on the tanks either.
what torch tip brand do you recommend?
Have you compared to oxyacetylene to air air acetylene (like Turbo Torch)?
That’s a “MC” Acetylene Tank and a “M” Oxygen Tank. Does anyone know what “MC” and “M” stand for? Also I always use a Solid Wrench for my Acetylene Tanks, when the Wrench is on the Valve, it means the Valve is “Open” Hung over the Regulator, means the Valve is “Closed.” I put a Wire Cinch tie through the Smaller Wrenches, a Short Looped Chain through the bigger Wrenches, so I can hang them.
Thankyou
You’re welcome 😊
When is the best time to put on your ppe
Thanks for making these videos, they are really helpful and very well done, but I do have to disagree with your oxy-acetylene start/stop procedure. If you search every manufacturers torch manual, they ALL say to turn oxygen off first, then acetylene. Then in BOLD letters, they ALL say "In the event of an emergency, TURN OXYGEN OFF FIRST". The reason is that if you have a leak from the torch handle acetylene valve, and have the oxygen still flowing, you CAN burn acetylene right back into the acetylene tank, and in order to burn inside the handle/hose/tank, acetylene needs oxygen to do so. Turning off the oxygen first prevents a possibly deadly event from ever happening. Same hazard with turning your oxygen on first when lighting up.
Oxygen off first also prevents the "popping" sound you hear, and that pop is not "blowing things clear" of the tip, but blowing things back into the nozzle where it clogs the tip with soot.
If you are quick with the oxygen after lighting the acetylene first, soot is held to a minimum, and if outdoors, it doesn't matter at all.
I like his video. but have to say I agree with you about the problems that you mentioned . the right procedure also in the textbook.
I think I'm wrong but, at 1:45 when you said counterclockwise, didn't you go clockwise instead? I
what size is your ratcheting service wrench
Craig, just wondering what you preference is for a nitrogen regulator specifically for purging while brazing? Also curious what your thoughts are to just using acetylene versus oxy acetylene for brazing ACR piping. thanks
Hey Kenny, the flow reg and nitrogen regs I use are linked on the third line down at amazon.com/shop/acservicetech - and in reference to air acetylene vs oxy acetylene, air acetylene will take care of any need for residential and light commercial unless of very high winds. oxy acetylene will allow to put more heat in a targeted area faster. You do want to get in and get out as fast as possible so it is a help but either will do. Did you check out and look up the video "acservicetech brazing with without nitrogen"?
@@acservicetechchannel Thanks Craig, yes I did see that video I was just curious on your personal preference.
Yes I am also curious to your personal preference, currently use oxy acetylene myself, thinking about switching over.
Thanks, great info didn’t know this. Question, what’s your take on using a rosebud tip to braze ? I’m new to the trade by the way.
I think it is useful for get two sides at a time but really when you are used to a tip, you can do just about anything with it. It is fun to try different tips though but always practice first before using on a system to get the different technique and timing down, thanks
Can you show us how to braze in some line sets? Thank you!
I would like to soon, thanks Danny! Have you checked out the air acetylene ones in the "brazing with nitrogen" playlist? I put a full installation in there which was 3 videos total, thanks
You use a #2 tip in the video. Is that the preferred tip for brazing copper lines? What is the advantage of the #2 vs #0 for this application?
The #2 tip is basically the most used torch tip in the HVAC industry for brazing residential/light commercial systems with 3/8", 5/8", & 3/4" copper line sets.
When u say reducing flame you mean carbonizing flame right. 1by 2 by etc carbonizing flame for soldering/brazing, neutral flame for brazing/welding, oxidizing flame for cutting bending And destroying stuff lol. When the outter cone is 2 x the length of the inner cone that's called a 2x carbonizing flame. Use this flame if your not sure of your ability to avoid pokeing holes in pipes. Sure hope you have a back flow preventer on there instructing folk to turn on oxy b4 turning on ace. Ace is the 1st thing u turn on and the 1st thing u turn off. Have you ever seen and unstable ace bottle explode. This is what happens when the acetone becomes unstable in the bottle from laying down and not being stores in the upright position. If this were to happen with oxy being turned on 1st BOOM. They probably won't live to tell the tale. Understand the soot thing. Lack of oxy. It's not near as bad with a clean torch tip.
Lady's and gents, never turn the valve on an ace tank more than 1/4 turn. In an emergency you have to be able to turn it off quickly. Ok to turn oxy tank valve all the way open. Set ace at 6psi and oxy at 8psi. This will get you through just about any job. When you get urself proficient at brazing with various tip sizes typically 0 thru 3, step up to a rosebud tip. It's like using a turbo torch on steroids. Lol. No disrespect meant here. I've seen bad things happen to inexperienced people playing with a rocket ship in a cart. Happy welding 😁
Wow, thank you..my teacher never explained it this well..and they told us to keep acetylene under 10 and oxy under 45!!!..so much bad information..at least they said the part about only turn acetylene 1/4 turn
You mean carburizing flame....not carbonizing 🤦
@@soukavathkeomisy3858 yeah that one 😁👍
@@soukavathkeomisy3858 hey man, I. Can spell Technician, But I are one 🤪 haha
About safety rules first acetylen then oxygen is opened and before closing first oxygen then acetylen is closed. But in your video not to have fume residues you prefered to do the opposite. Could you explain this sequence if am wrong. Because I made a research on safely using torch and findings shows as I write in here. Many thanks for invaluable lessons.
No prob, we can't have all that carbon dust in the house and most people like to have that loud pop that blows out any residue from the end of the tip but if the flame was clean and you are only brazing copper, there won't be much of any so you don't have to scare the homeowner with the popping, thanks
@@acservicetechchannel Thanks for making these videos, they are really helpful and very well done, but I do have to disagree with your oxy-acetylene start/stop procedure. If you search every manufacturers torch manual, they ALL say to turn oxygen off first, then acetylene. Then in BOLD letters, they ALL say "In the event of an emergency, TURN OXYGEN OFF FIRST". The reason is that if you have a leak from the torch handle acetylene valve, and have the oxygen still flowing, you CAN burn acetylene right back into the acetylene tank, and in order to burn inside the handle/hose/tank, acetylene needs oxygen to do so. Turning off the oxygen first prevents a possibly deadly event from ever happening. Same hazard with turning your oxygen on first when lighting up.
Oxygen off first also prevents the "popping" sound you hear, and that pop is not "blowing things clear" of the tip, but blowing things back into the nozzle where it clogs the tip with soot.
If you are quick with the oxygen after lighting the acetylene first, soot is held to a minimum, and if outdoors, it doesn't matter at all.
@@acservicetechchannel if you keep lighting you’re torch that way, like I used to also, one day, if your unlucky, you’ll get a pop alright, about a hundred of them in a second or so. If you don’t want the soot, just open up the ac a little more, and you won’t have that. Otherwise I thought your presentation was great.
Put the sparker down as you adjust the knobs.
No check valves?
What tools do you recomend for a starting hvac tech?
Ismael look up "acservicetech sheet metal tools" and "acservicetech basic tools" and I have tools linked in the description section of each video as well as at- amazon.com/shop/acservicetech - thanks
Can you help me with this. On checking the compressors windings. I know if you test your C R and S to ground you know if your compressor is grounded. Im having problems how to figure out if your compressor has open windings or has shorted windings. What is the way to test them? Thanks for the help
The tourch off when oxygen turn on why?
I would like to give my class of six students and myself a gift of the UEI Meter with the temperature probe and I am not sure what is the best one. I want to buy from your site. I know there is the probe that you have to tape and the clamp on. Please help me find the best one and one you have used so you know for sure it is the best by actually using it. I am also confused about the Patreon and I want to join but am not technically savvy.
Hey teacher Lynn, Here is the newer multimeter I use in the videos and in the field. it does come with a bead k-type temp sensor but I would highly highly recommend also getting some ST4's for the classroom with the dual temp sensors with calibration- UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ - Here is the link to the Fieldpiece ST4 Dual Temp Meter- amzn.to/2wc1ME3 - an in reference to patreon.com/acservicetech - if you would like to support there then you would choose a level such as community or another and then choose how many new videos you would like to support each month. Basically you would be pledging to support each new video uploaded to this channel up to how ever many you select. Once you are in there, then you can send me messages through patreon after logging in or just through the email, thanks Lynn!
Thank you and I will check all the equipment you gave and then I will buy through you but I may have another question. Thank you for all you do. I have to be careful of how much I buy because it is coming out of my funds. I think the meter with temp sensor would be a great place to start for my students.@@acservicetechchannel
I hear ya on the funds. I would always be writing down all of the tiniest items so that I wouldnt forget later. Once it got to ordering, I would always have to cut things out. Thanks and feel free to ask away thanks