Enjoyed watching this. In 1970 I commenced work as a refrigeration engineer and stayed in the industry for 14 years. Left and went on to other things. Have not brazed a joint since 1984! It hasn’t changed a bit in all that time. That was in the days before even mobile phones. Electronic instruments and controls were just being seen in the industry for the first time as I was leaving. From speaking to friends still in the industry and now at the end of their careers biggest changes seem to be the types of refrigerants (almost exclusively R12, 22 and 502 in those days), electronic and computerised controls and scroll compressors. Pleased I got out of the industry mind. Sometimes nostalgia kicks in but for the most part pleased with the choices I made. Thank you for the video.
@@TheBlank1Ne well I could see then that i might struggle physically with the demands of the work when I got older. I left the industry at 28 years of age and I was looking at men in their 50’s struggling to do the work. So I got out, studied at University and changed career to law. I am still working full time now and I am 67 entirely from home. Planning to retire next year but from choice, not because I can’t cope with the work. For me it was definitely a good choice to make. So I was coping no problem as a 28 year old but could see that would change as I got older.
The same people who think the dull cherry red is too hot are the same people who’s braze rod sticks to the pipe when they try to fill the joint and dosent flow. The pipe must be hot enough to cause capillary action and that is usually at the temperature of cherry red
You are absolutely correct and he is on the right path if I had anything to say it would be to apply the flame to both pipe and fitting at the same time and faster to avoid oxidation the torch tip should be closer at the blue part of the flame to get to temperature
I like your video, nice production. I just have a few notes. First, there was no mention of any nitrogen. Nitrogen is necessary to prevent the oxidation of the copper during the brazing process. The particles left behind, especially on very sensitive newer equipment can eventually lead to an obstruction like oil pooling in condenser coil or blocked TXV or piston. Second, prepping the copper correctly helps ensure a proper weld (add a bit more info for the beginners). Third, I liked the way you ensured a solid weld around the piping. I did notice that you had you stick bent allowing for about 1" of rod. Example, allow 2-4" of round off your coupling. Use the rule of thumb, if your nail can get caught on the joint, round it off more rod. Lastly, always heat the copper at the fitting not the pie going into fitting, this really helps. Especially with vertical braze joints. Good video, we all are learning each day!
heating the fitting is BS. the fitting will glow red hot Way before the pipe. in vertical situation you can add a little heat to the fitting so it soaks up better. everything else is good/usable information.
@@alanraza2570Well, It's just nitrogen gas from a gas cylinder that says "nitrogen". Just find a way of having a small but steady stream of it through the pipe when brazing. It's purpose is to keep oxygen away from inside the tubes.
The key to brazing in refrigeration is to get the joint hot quickly ( not red hot ) and fill it quickly. If you were to get a service valve, reversing valve, or TXV this hot, it would be ruined.
Agreed. There are a few options out there but I'm weary about some of them. The "cool gel" type products tend to work pretty well. I usually try to wrap a wet rag around the sensitive components. But brazing the suction line into an air handler is always a little scary for me because it's so close to everything else. Oxygen Acetylene works great to heat up quickly, but I rather use Acetylene. Just figuring out how to protect the components can get tricky.
Brazing rod melt at 1200+ degrees… That’s glowing red temps. Soldering is done at much lower temps, there are good HVAC solders available nowadays. Just got to be carful not to flux it like a plumber would.
I've learned not to be cheap on the heat. Lots of heat will make sure there's no unfilled voids, and the heat will have less time to spread. I wrap sensitive components with wet rags and place sheet metal for shielding things close by that may get accidentally burned.
I am learning everthing on TH-cam And for refrigration I will agree to heat fast ,soon as the rod start melting you want to get it done ,because if you build too much oxidation from inside it will clog the filter dryer or it can damage the compressor
I work well outside the scope of welding in commercial roofing. It's a healthy endeavor to at least have a curiousity to what some of our brothers and sisters in other trades do in contribution to our projects. Thank you for sharing knowledge.
This is brazing buddy not welding, there's a huge difference between the two. But, more power to you for being a roofer, one of the most underpaid and dangerous jobs to ever have! 💪🏼
@ASAPJermz it's not that far off from welding. My old man taught me how to weld using an acelatine torch and coat hanger. The main difference is temperature and you're not melting the main metals.
Wow 🤩 there’s too many PRO commenting, but no body got the BALLS 🏀 to do a video. Great job folks. Let’s a praise the algorithm for bringing us all together again
never apply flux on your fitting only the pipe, you dont want to push in the flux and damage the inside of the pipe and corrode it because flux is a acid.
Thanks. My first braze worked out great after viewing your tutorial. Previously I was not preparing the surfaces correctly and the pipes were not hot enough. I really had to heat them longer than expected using MAP gas.
Dammit, I am seeing your comment one year later and wonder if your equipment lasted this long if you followed this idiots directions. Never got your pipe cherry red unless you don’t like the people your doing the work for.
Try moving your heat off of the pipe and towards the bottom of the cup. You should be filling that cup, then draw the flame back and cap the joint so you can not see the lip.
Nicely made video dude, just a couple things to improve on in my opinion. Cherry red tends to be too hot for a quality joint, as you run the risk of porous braze joints. Preheat your female fitting to a dull red, and start to feed the brazing alloy in using the heat of the copper to melt the alloy. Flux is a must on dissimilar metal joints, and I suggest using 15% silver alloy for copper to copper. 45% for copper to brass etc. plus flux.
I am from India and I completed my engineering recently. I am preparing for the entrance exam for my masters. Today I studied the topic of Brazing. Thanks for this video.
One small critique if I may. If you hold the inner flame on the joint it will heat much more efficiently and move the flame in toward the fitting as the filler follows the heat. You don’t need so much on the pipe. Also, that long under the torch seems to weaken the fitting to a degree that it easily collapses at the slightest torque
The reason the fitting collapses is because heating it cherry red and allowing it to cool annuals the metal and makes it soft. If you heat it and then hit it with a cold rag quickly, it will harden again. This is tricky as a guy in the field probably isn't controlling the temperature that accurately and quenching improperly can create cracks and internal stresses.
Im not really an expert, but I agree. The heat draws the solder or braze in. Some of what happened here just layed more filler on yop, improving the look, but didn't likely travel in to where it counts. The idea is to work the torch to evenly heat the assembly and 123 add braze so it runs in. In some ways you only have one shot to really nail it perfect. Will still hold, but you'll have added twice the filler. Most will just be laying on top.
Wow there’s too many PRO commenting, but no body got the BALLS to do a video. Great job folks. Let’s a praise the algorithm for bringing us all together again
When cleaning the burr the copper line must be tilted down so the burr doesn't get inside the tube. The tiniest amount will become a restriction. When brazing you should purge with nitrogen otherwise the scale produced inside the tube will mix it today's refrigerant oils causing restriction and or attach the compressor winding's..It should also be mentioned to use minimum 5% silver upwards to 15% silver content solder when welding air conditioning and refrigeration copper ..
OB Wan, you have a pretty good understanding, and you have a descent description (that you give here within). I would agree that 5% to 15% silver content brazing rod [not solder(ing)] and it is not welding (it's brazing).
I do commercial refrigeration for a living and have run 2 5/8 pipe through an entire building for a grocery store. Your prep work is perfect. But Red hot is way too hot for a small pipe like that. I am saying this respectfully as I just want to help u. your welds did not get enough penetration into the cup of the 90 and they would crack and leak in the field and you did not put a shoulder on the rim of the cup. You should start by heating up the pipe that is going into the cup of the 90 (this will help the rod start to melt when it is time to add it) then work your way onto the cup of the 90, now u can start adding the rod onto the rim of the cup of the 90. Now move the flame from the rim towards the center of the 90 and watch the brazing rod rush deep into the entire cup. Now do this all the way around the cup of the 90. Then pull your torch back and add a “shoulder” to it meaning. Pull the heat back to where it is just barely melting the rod and adds barrier of rod where the rim of the 90 and the pipe is. This is an insurance policy for leaks.
Just started in the industry and there is so much I don’t know. My 2 attempts so far I melted the pipe. Thanks for the tips. Hopefully I’ll catch on sooner rather than later.
I thought the same thing.... in parts of Denver you will find 40+ year old brazing of 2" copper that is mind blowingly perfect. Some inspectors don't even know what they are looking at... thinking it was factory ordered !!!!!!
@@thomasyunick3726 First off he didn't have enough heat, should have been using oxy/acet torch. Then he said he was going to "fill the gap" capillary action doesn't have "gaps". My brazing certificate was with 2 1/8" type L copper using 15% sil-fos and flux, I was able to achieve 98-99% coverage on vertical, horizontal and angled tube. This looks like he was buttering a piece of bread..
@@josephsangregory6436 My favorite was always flaring. ( so easy ) 1" soft copper... 2 wrenches, cutter, flare tool, hammer, fitting. I spend a lot of time in deep trenches. I brazed for a little while but mostly helped a certain friend here or there. that also plumbed submarines for decades. I have tagged along on many many repairs. A lot of 2' pipe. I have definitely made a few pipes connect more than once. I do stop and waste and backflow connections for irrigation.
I used to love brazing, its a strong and very satisfying welding procedure that once mastered you can keep perfecting. Haven't done it at all for many years.
Good tutorial. I've been in HVACR many years and never used acetylene without oxygen so I can't opinion on whether is better but it appears that the pipe is a little bit hotter than it needs to be. Okay for pipe to pipe connections but maybe too long and too hot for heat sensitive connections like reversing valves, TXV's, service valves etc. even though a heat block paste or damp rag is implemented. I use 15% brazing rod and I find it flows much better than 5% at a lower heat. I did learn that I don't clean my copper as well as I should. Lol...
Why exactly is flux bad for refrigeration? Just curious. I see it used when bonding unlike metals such as brass/copper. I agree with the nitrogen but this is just one method and the method used most. Let's get real, the guys in the field wont lug a nitro tank with them along with their B tanks all the time. Thanks for watching!
@@JumpermanTech if you was a hvac tech and told me you wouldnt carry nitrogen with your torches to install my refrigeration lines id send you packing thats what causes all kinds of burnouts and txv problems
air-acetylene is common in hvac in the us because it means you only have to haul 1 tank up the ladder to the roof, but it's not great for everything. i used to service small appliances like air conditioners, refrigerators and dehumidifiers where the tubing is very small, the working clearances are very tight and many times the units are made of plastic that you can't easily shield from heat. in those cases a small oxyacetylene setup with small tips and special tips like the uniweld cap'n-hook work much better because you can braze the joint very quickly without setting things on fire or melting them.
I like to carry around about a 12"x12" piece of 26ga sheet metal for tight spaces or plastic units. If you leave a burn mark through the sheet metal then you left the flame in 1 position for waaaay too long.
I always leave a link in all my videos descriptions for the items used in my videos. I will leave you a link below for the torch. Thanks for watching! TurboTorch Kit X-4B (A/C & Refrigeration kit) amzn.to/3b1QZ2R
Good video, but if you cut that joint in half, you will find flakes of contaminants on it from exposure to the air - bad news for orifices. An inert gas in the pipe while brazing will prevent the contamination by shielding it from the air.
In the industry we use a Oxy/acetylene kit, the only place we use a B tank with turbo torch is on open lineset mostly in commercial refrigeration. Also use a silfos alloy and not some cheap silver. Don't heat the cupling first, always the pipe first so the silfos stick to the pipe then heat the fitting to penetrate. Flux is used when you use different metal and also when reusing old piping.
To all the pros here, I am a beginner in brazing. I have been wonder what will happen to the brazing joint after a certain of time exposed to the environment? I used a copper-based brazing alloy as the filler metal to join two pieces of carbon steel plate. What is the possible failure that may occur on the brazed plate?
It gets tricky binding ferrous and non ferrous metals. Just make sure everything is CLEAN PRIOR TO BRAZE. A bit more info on the actual rod used could provide a better answer to your question.
2/21/2021 For a Person that wants to teach others you need to learn your self. First your torch is way to hot. You use to much solder. Second you heat the elbow then the pipe that into the elbow. Third heat on the elbow causes suction. The suction pulled the solder into the elbow. Fourth you use only the amount Solder that is needed. If you have the pipe and Elbow glowing CHERRY red the solder won't stay in the elbow. When you add heat to a glowing red Copper Pipe the solder will fall out. Add Solder to the opposite side of the copper pipe always from the heat. The elbow and pipe is hot enough, with pipe soaked from all the heat the solder will melt. Fifth if soldering be sure to Clean and de-bur the Copper ends or joints to be welded. Sand the joints with sand Paper. If brazing Copper to Copper using solder use a Acid Pipe Cleaner for Soldering. If you are brazing Copper to Copper with seal-flos 15 percent Silver Solder sand each joint of that pipe and wipe clean each end and Joint before welding. Never use any cleaner acid if welding Seal-flos. Flow 5 to 10 cubing feet of Nitrogen through the copper to stop copper sulfate (ash) building up inside the Copper Lines if used on HVAC. The Ash in the HVAC will plug the Pump and Valves on the HVAC Units. Never Braze Copper to Copper with Seal-flos without flowing Nitrogen into the lines being welded. Clean your joints after welding with a damp rag. Pressurize all you joints for leaks.
I'm no HVAC pro but I've seen what happens to the inside of copper pipe when nitrogen isn't used while brazing. All those flakes can't be any good for expansion valves or anything else.
Does this take longer to do than plumbing soldering because of the type of materials that need to be heated up? It seems almost identical to sweating pipes but i believe that solder is softer and easier to melt etc...?
Cool video and i think your good intention were good of showing how to braze and I give you a credit as well as pointing some stuff that was wrong. With time you'll will perfect your brazing skills. But don't use short radious 90's for refrigeration just saying.
They are called brazing rods. They come in different percentages and that percentage is the silver content in them. Higher the percentage, higher silver content and strength. Typically the standard is 5-15% for a solid connection from copper to copper. Make a clean cut, sand it down and braze👍 Thanks for watching!
Your penetration is ok but Definitely Need to get your heat control down and a thicker Bead but at the end of the day as long as it doesn’t leak you’re good!
I see why so many disliked. 1. You dont have to heat till cherry red. 2. Remove the flame when you apply. 3. Heat from the backside when testing if yhe heat is good. 4. Let the braze do the work. It will be a cleaner finish. It looks like you burnt toast. It should be shinny and clean
I see some comments and if y’all are so good at brazing.... why are y’all watching a “how to” on brazing? I understand commenting to offer advice or how you would’ve done something different, but commenting to bash and make fun, why are you here to begin with? Show us your brazing, yeah? I’m by no means good at brazing, my tail woulda used half a rod on one joint 🤣 but that’s why I’m here... to learn
I do not like to bash, but the reason that I comment is to help. This is not a good video and people are being fed bad information as well as being shown the wrong execution of brazing techniques.
Thanks for the video. I'm a pipefitter who is transitioning into a job that is still pipefitting but more refrigeration related. I was a little nervous about my brazing skills, but I liked the way you bent that sil fos. I'll probably watch it a few more times just to get a feel for where you are putting your heat when you are melting your rod
I have a question every brazing kit I see uses oxygen with mapp , which is better acetylene only or using oxygen and MAPP, I have never braised plenty a soldering, but never braised
Thank you! All my videos I leave a link for the products used in the description. I will send you a link below for the torch kit🙃 Thanks for watching & stay tuned for new videos every week! TurboTorch Kit X-4B (A/C & Refrigeration kit) amzn.to/3b1QZ2R
Thank you so much! I really appreicate the feedback. Practice and you'll be just fine! Sending blessings your way from NYC. Thanks for watching & stay tuned for weekly uploads🙂
So no movement to facilitate capillary action? This looks nice on the surface but I would recommend travelling the heat down a little to form a much taller seal internally.
How you doing can you make a video where a copper tube is cracked millimetres from the compressor shell where its leaking oil and needs to be filled with the special welding rod...and what material to use..thnks
Could I braze the vertical pipe first? then after that I rotate the pipe 90 degrees, and make the horizontal one to vertical, then braze it? because I think when braze the vertical one, the melt metal will go down into the gap between the pipes it will make the join much stronger. Thank you for sharing!
That hurt, didn’t pull the braze into the joint, kept moving the torch around way too much, no flowing around the joint just dabbing, get the heat correct first and stay at the correct distance, heat, melt, pull into joint with the heat, fill the joint. Practice a few before posting lol
Enjoyed watching this. In 1970 I commenced work as a refrigeration engineer and stayed in the industry for 14 years. Left and went on to other things. Have not brazed a joint since 1984! It hasn’t changed a bit in all that time. That was in the days before even mobile phones. Electronic instruments and controls were just being seen in the industry for the first time as I was leaving. From speaking to friends still in the industry and now at the end of their careers biggest changes seem to be the types of refrigerants (almost exclusively R12, 22 and 502 in those days), electronic and computerised controls and scroll compressors. Pleased I got out of the industry mind. Sometimes nostalgia kicks in but for the most part pleased with the choices I made. Thank you for the video.
What did you leave for? I'm interested.
@@TheBlank1Ne well I could see then that i might struggle physically with the demands of the work when I got older. I left the industry at 28 years of age and I was looking at men in their 50’s struggling to do the work. So I got out, studied at University and changed career to law. I am still working full time now and I am 67 entirely from home. Planning to retire next year but from choice, not because I can’t cope with the work. For me it was definitely a good choice to make. So I was coping no problem as a 28 year old but could see that would change as I got older.
Hey! I have questions to you because i'm studying refrigerant engineer if you don't mind of course
The same people who think the dull cherry red is too hot are the same people who’s braze rod sticks to the pipe when they try to fill the joint and dosent flow. The pipe must be hot enough to cause capillary action and that is usually at the temperature of cherry red
You are absolutely correct and he is on the right path if I had anything to say it would be to apply the flame to both pipe and fitting at the same time and faster to avoid oxidation the torch tip should be closer at the blue part of the flame to get to temperature
Yup you are right. These same people do not know about "liquidus temperature" and capillary action.
I like your video, nice production. I just have a few notes. First, there was no mention of any nitrogen. Nitrogen is necessary to prevent the oxidation of the copper during the brazing process. The particles left behind, especially on very sensitive newer equipment can eventually lead to an obstruction like oil pooling in condenser coil or blocked TXV or piston. Second, prepping the copper correctly helps ensure a proper weld (add a bit more info for the beginners).
Third, I liked the way you ensured a solid weld around the piping. I did notice that you had you stick bent allowing for about 1" of rod. Example, allow 2-4" of round off your coupling. Use the rule of thumb, if your nail can get caught on the joint, round it off more rod. Lastly, always heat the copper at the fitting not the pie going into fitting, this really helps. Especially with vertical braze joints. Good video, we all are learning each day!
This guy knows what he's talking about. Can confirm
heating the fitting is BS. the fitting will glow red hot Way before the pipe. in vertical situation you can add a little heat to the fitting so it soaks up better.
everything else is good/usable information.
@@casemodder89 I should have stated to start heating at the fitting. Nice catch!
Nitrogen to prevent oxidation? Can you elaborate please? What is the product you use for that?
@@alanraza2570Well, It's just nitrogen gas from a gas cylinder that says "nitrogen". Just find a way of having a small but steady stream of it through the pipe when brazing. It's purpose is to keep oxygen away from inside the tubes.
The key to brazing in refrigeration is to get the joint hot quickly ( not red hot ) and fill it quickly. If you were to get a service valve, reversing valve, or TXV this hot, it would be ruined.
Agreed. There are a few options out there but I'm weary about some of them. The "cool gel" type products tend to work pretty well. I usually try to wrap a wet rag around the sensitive components. But brazing the suction line into an air handler is always a little scary for me because it's so close to everything else. Oxygen Acetylene works great to heat up quickly, but I rather use Acetylene. Just figuring out how to protect the components can get tricky.
Brazing rod melt at 1200+ degrees… That’s glowing red temps. Soldering is done at much lower temps, there are good HVAC solders available nowadays. Just got to be carful not to flux it like a plumber would.
I always used oxygen with acetylene. Maybe he’s taking so long because he’s only using acetylene.
I've learned not to be cheap on the heat. Lots of heat will make sure there's no unfilled voids, and the heat will have less time to spread. I wrap sensitive components with wet rags and place sheet metal for shielding things close by that may get accidentally burned.
I am learning everthing on TH-cam
And for refrigration I will agree to heat fast ,soon as the rod start melting you want to get it done ,because if you build too much oxidation from inside it will clog the filter dryer or it can damage the compressor
I work well outside the scope of welding in commercial roofing. It's a healthy endeavor to at least have a curiousity to what some of our brothers and sisters in other trades do in contribution to our projects. Thank you for sharing knowledge.
This is brazing buddy not welding, there's a huge difference between the two. But, more power to you for being a roofer, one of the most underpaid and dangerous jobs to ever have! 💪🏼
I'm with you, I'm an insulator and work with fitters and plumbers all day. Knowledge is power.
@ASAPJermz it's not that far off from welding. My old man taught me how to weld using an acelatine torch and coat hanger. The main difference is temperature and you're not melting the main metals.
Wow 🤩 there’s too many PRO commenting, but no body got the BALLS 🏀 to do a video. Great job folks. Let’s a praise the algorithm for bringing us all together again
I'll post one tomorrow when Im on the roof of the building we're working on now
@@dreadsdontmakemehrasta lying ngga
Amana says not to use flux when brazing. The flux mixes with the refrigerant oil and forms an acid that compromises TXV and compressor.
For dissimilar metals only-do.your research.
never apply flux on your fitting only the pipe, you dont want to push in the flux and damage the inside of the pipe and corrode it because flux is a acid.
Thanks. My first braze worked out great after viewing your tutorial. Previously I was not preparing the surfaces correctly and the pipes were not hot enough. I really had to heat them longer than expected using MAP gas.
Dammit, I am seeing your comment one year later and wonder if your equipment lasted this long if you followed this idiots directions. Never got your pipe cherry red unless you don’t like the people your doing the work for.
Try moving your heat off of the pipe and towards the bottom of the cup. You should be filling that cup, then draw the flame back and cap the joint so you can not see the lip.
gold！
Yup! Bad shoulder. He ain’t “brazing like a pro”
You mean the bell not cup
He definitely means cup aka fitting lingo is lingo but a perfect braze and a good braze are 2 different things and this ant it
Nicely made video dude, just a couple things to improve on in my opinion. Cherry red tends to be too hot for a quality joint, as you run the risk of porous braze joints. Preheat your female fitting to a dull red, and start to feed the brazing alloy in using the heat of the copper to melt the alloy. Flux is a must on dissimilar metal joints, and I suggest using 15% silver alloy for copper to copper. 45% for copper to brass etc. plus flux.
purely gold
In fairness, he mentioned flux for dissimilar metals
I am from India and I completed my engineering recently. I am preparing for the entrance exam for my masters. Today I studied the topic of Brazing. Thanks for this video.
Very precise step by step demonstrations
One small critique if I may. If you hold the inner flame on the joint it will heat much more efficiently and move the flame in toward the fitting as the filler follows the heat. You don’t need so much on the pipe. Also, that long under the torch seems to weaken the fitting to a degree that it easily collapses at the slightest torque
The reason the fitting collapses is because heating it cherry red and allowing it to cool annuals the metal and makes it soft. If you heat it and then hit it with a cold rag quickly, it will harden again. This is tricky as a guy in the field probably isn't controlling the temperature that accurately and quenching improperly can create cracks and internal stresses.
Jeff Peterson but quenching can cause cracks in the filler and leak
@@jeffpeterson1331aa+❤z3❤are ru fy9t9tr9lttottg6y5
Im not really an expert, but I agree. The heat draws the solder or braze in. Some of what happened here just layed more filler on yop, improving the look, but didn't likely travel in to where it counts. The idea is to work the torch to evenly heat the assembly and 123 add braze so it runs in. In some ways you only have one shot to really nail it perfect. Will still hold, but you'll have added twice the filler. Most will just be laying on top.
The teacher said something similar. Apply heat to the back of the fitting so the solder chases the heat. Got my first brazing copper project tomorrow.
Wow there’s too many PRO commenting, but no body got the BALLS to do a video. Great job folks. Let’s a praise the algorithm for bringing us all together again
Not everybody has the free time to make a video on something so simple
When cleaning the burr the copper line must be tilted down so the burr doesn't get inside the tube. The tiniest amount will become a restriction. When brazing you should purge with nitrogen otherwise the scale produced inside the tube will mix it today's refrigerant oils causing restriction and or attach the compressor winding's..It should also be mentioned to use minimum 5% silver upwards to 15% silver content solder when welding air conditioning and refrigeration copper ..
0% is also acceptable.
OB Wan, you have a pretty good understanding, and you have a descent description (that you give here within). I would agree that 5% to 15% silver content brazing rod [not solder(ing)] and it is not welding (it's brazing).
I do commercial refrigeration for a living and have run 2 5/8 pipe through an entire building for a grocery store. Your prep work is perfect. But Red hot is way too hot for a small pipe like that. I am saying this respectfully as I just want to help u. your welds did not get enough penetration into the cup of the 90 and they would crack and leak in the field and you did not put a shoulder on the rim of the cup. You should start by heating up the pipe that is going into the cup of the 90 (this will help the rod start to melt when it is time to add it) then work your way onto the cup of the 90, now u can start adding the rod onto the rim of the cup of the 90. Now move the flame from the rim towards the center of the 90 and watch the brazing rod rush deep into the entire cup. Now do this all the way around the cup of the 90. Then pull your torch back and add a “shoulder” to it meaning. Pull the heat back to where it is just barely melting the rod and adds barrier of rod where the rim of the 90 and the pipe is. This is an insurance policy for leaks.
Just started in the industry and there is so much I don’t know. My 2 attempts so far I melted the pipe. Thanks for the tips. Hopefully I’ll catch on sooner rather than later.
I've been doing this for 40 years as a contractor in the HVAC/R industry and I would fire you on the spot :)
I thought the same thing.... in parts of Denver you will find 40+ year old brazing of 2" copper that is mind blowingly perfect. Some inspectors don't even know what they are looking at... thinking it was factory ordered !!!!!!
@@thomasyunick3726 First off he didn't have enough heat, should have been using oxy/acet torch. Then he said he was going to "fill the gap" capillary action doesn't have "gaps". My brazing certificate was with 2 1/8" type L copper using 15% sil-fos and flux, I was able to achieve 98-99% coverage on vertical, horizontal and angled tube. This looks like he was buttering a piece of bread..
@@josephsangregory6436 My favorite was always flaring. ( so easy ) 1" soft copper... 2 wrenches, cutter, flare tool, hammer, fitting. I spend a lot of time in deep trenches. I brazed for a little while but mostly helped a certain friend here or there. that also plumbed submarines for decades. I have tagged along on many many repairs. A lot of 2' pipe. I have definitely made a few pipes connect more than once. I do stop and waste and backflow connections for irrigation.
I used to love brazing, its a strong and very satisfying welding procedure that once mastered you can keep perfecting. Haven't done it at all for many years.
Nice information in this. thanks brother, much appreciated.
Good tutorial. I've been in HVACR many years and never used acetylene without oxygen so I can't opinion on whether is better but it appears that the pipe is a little bit hotter than it needs to be. Okay for pipe to pipe connections but maybe too long and too hot for heat sensitive connections like reversing valves, TXV's, service valves etc. even though a heat block paste or damp rag is implemented. I use 15% brazing rod and I find it flows much better than 5% at a lower heat. I did learn that I don't clean my copper as well as I should. Lol...
Good video, you just give me a good idea.You are very smart and very brilliant.Brilliant thank you for everything
no drifting with nitro? leaves a-lot of suet inside the pipe and can clog your metering device.
With that size pipe I would have capped the joint but this is definitely the best how to video I’ve seen yet
Nice work brazing is an art!
Thank you!
Flux is bad for refrigeration, and you should run low pressure nitrogen through the pipe while brazing
SIRUS tone exactly
You realize it’s just a demo not a full process. Make your own video and do it right
Why exactly is flux bad for refrigeration? Just curious. I see it used when bonding unlike metals such as brass/copper. I agree with the nitrogen but this is just one method and the method used most. Let's get real, the guys in the field wont lug a nitro tank with them along with their B tanks all the time. Thanks for watching!
@@whit6282 Seriously lol I agree with the nitrogen part but this is just one method and the method used most. Thanks for watching!
@@JumpermanTech if you was a hvac tech and told me you wouldnt carry nitrogen with your torches to install my refrigeration lines id send you packing thats what causes all kinds of burnouts and txv problems
Thank you we love it!
Nice informative video bro . Thanks for the nice video
So, would you say slow air cooling after brazing??? is better
air-acetylene is common in hvac in the us because it means you only have to haul 1 tank up the ladder to the roof, but it's not great for everything. i used to service small appliances like air conditioners, refrigerators and dehumidifiers where the tubing is very small, the working clearances are very tight and many times the units are made of plastic that you can't easily shield from heat. in those cases a small oxyacetylene setup with small tips and special tips like the uniweld cap'n-hook work much better because you can braze the joint very quickly without setting things on fire or melting them.
I like to carry around about a 12"x12" piece of 26ga sheet metal for tight spaces or plastic units. If you leave a burn mark through the sheet metal then you left the flame in 1 position for waaaay too long.
Air-fuel is a better way to go on smaller copper to copper.
Which brazing touch is this. I need one.
Some one should give information about this touch
I always leave a link in all my videos descriptions for the items used in my videos. I will leave you a link below for the torch. Thanks for watching!
TurboTorch Kit X-4B (A/C & Refrigeration kit)
amzn.to/3b1QZ2R
I always put a big puddle on the top and heat the bottom of the joint and run the braze down to seal the bottoms
Love this! Beautiful. And I dig the music. I will be making a table and I'm excited to do some brazing with the copper pipe. Thank you.
Good video, but if you cut that joint in half, you will find flakes of contaminants on it from exposure to the air - bad news for orifices. An inert gas in the pipe while brazing will prevent the contamination by shielding it from the air.
Not a good video.
Thanks, this was very useful!
In the industry we use a Oxy/acetylene kit, the only place we use a B tank with turbo torch is on open lineset mostly in commercial refrigeration.
Also use a silfos alloy and not some cheap silver.
Don't heat the cupling first, always the pipe first so the silfos stick to the pipe then heat the fitting to penetrate.
Flux is used when you use different metal and also when reusing old piping.
I’m a 49+ year service tech #1 rule when you think it’s clean clean it again!!!
will this copper self fluc rod polish to a proper copper color after sanding?
No, it will not.
Appreciate the video,
and how to size down for the capillary?
What do you mean by size down?
What about a convoluted or spiral HVAC tube?
Great video! Thankyou 👍
Welding skills 10/10
Welding knowledge 7/10
Thanks for the effort
To all the pros here, I am a beginner in brazing. I have been wonder what will happen to the brazing joint after a certain of time exposed to the environment? I used a copper-based brazing alloy as the filler metal to join two pieces of carbon steel plate. What is the possible failure that may occur on the brazed plate?
It gets tricky binding ferrous and non ferrous metals. Just make sure everything is CLEAN PRIOR TO BRAZE. A bit more info on the actual rod used could provide a better answer to your question.
2/21/2021 For a Person that wants to teach others you need to learn your self. First your torch is way to hot. You use to much solder. Second you heat the elbow then the pipe that into the elbow. Third heat on the elbow causes suction. The suction pulled the solder into the elbow. Fourth you use only the amount Solder that is needed. If you have the pipe and Elbow glowing CHERRY red the solder won't stay in the elbow. When you add heat to a glowing red Copper Pipe the solder will fall out. Add Solder to the opposite side of the copper pipe always from the heat. The elbow and pipe is hot enough, with pipe soaked from all the heat the solder will melt. Fifth if soldering be sure to Clean and de-bur the Copper ends or joints to be welded. Sand the joints with sand Paper. If brazing Copper to Copper using solder use a Acid Pipe Cleaner for Soldering. If you are brazing Copper to Copper with seal-flos 15 percent Silver Solder sand each joint of that pipe and wipe clean each end and Joint before welding. Never use any cleaner acid if welding Seal-flos. Flow 5 to 10 cubing feet of Nitrogen through the copper to stop copper sulfate (ash) building up inside the Copper Lines if used on HVAC. The Ash in the HVAC will plug the Pump and Valves on the HVAC Units. Never Braze Copper to Copper with Seal-flos without flowing Nitrogen into the lines being welded. Clean your joints after welding with a damp rag. Pressurize all you joints for leaks.
You're close - on and off on your points (made here).
This helped a lot thank you
I'm no HVAC pro but I've seen what happens to the inside of copper pipe when nitrogen isn't used while brazing. All those flakes can't be any good for expansion valves or anything else.
Nitrogen is only required for med gas that’s it
this is not welding.
That is how most txv fail
No you right man I just started to work in hvac and they ran nitrogen while we were brazing the copper together
i feel like you should shut the flup cup if you arent an hvac pro.
Fantastic l like your brazing very nice
Cool. Now I’m a professional plumber...Thanks for the video!
how it looks inside ?
Nicely done
Does this take longer to do than plumbing soldering because of the type of materials that need to be heated up? It seems almost identical to sweating pipes but i believe that solder is softer and easier to melt etc...?
Cool video and i think your good intention were good of showing how to braze and I give you a credit as well as pointing some stuff that was wrong. With time you'll will perfect your brazing skills. But don't use short radious 90's for refrigeration just saying.
great work
Hey! What kind of rods to torch with? U mentioned silver Brazing flux? Then u said something else??
They are called brazing rods. They come in different percentages and that percentage is the silver content in them. Higher the percentage, higher silver content and strength. Typically the standard is 5-15% for a solid connection from copper to copper. Make a clean cut, sand it down and braze👍 Thanks for watching!
Stay tuned for new videos every week! 🔧⚡️
I see everyone using the turbo torch inside. How well does it hold up in the wind with the heat?
Yes overhead and what about nitrogen purging
made it look so simple. Thank you
I like that torch.
A spray bottle before the rag works great also. 👍
It’s so good job
Thank you for the video
Excellent workmanship and skill complimented by superb videography. Thanks.
Not excellent. You should know.
Your penetration is ok but Definitely Need to get your heat control down and a thicker Bead but at the end of the day as long as it doesn’t leak you’re good!
“Your penetration is ok” that’s what she said.
do you need to wear tinted safety glasses with acetylene torch like that or no?
I see why so many disliked. 1. You dont have to heat till cherry red. 2. Remove the flame when you apply. 3. Heat from the backside when testing if yhe heat is good. 4. Let the braze do the work. It will be a cleaner finish. It looks like you burnt toast. It should be shinny and clean
Very nice
Thank you! Stay tuned for new videos every week🔧⚡️
I see some comments and if y’all are so good at brazing.... why are y’all watching a “how to” on brazing? I understand commenting to offer advice or how you would’ve done something different, but commenting to bash and make fun, why are you here to begin with? Show us your brazing, yeah? I’m by no means good at brazing, my tail woulda used half a rod on one joint 🤣 but that’s why I’m here... to learn
I do not like to bash, but the reason that I comment is to help. This is not a good video and people are being fed bad information as well as being shown the wrong execution of brazing techniques.
Good video
Stay Bright 8 is a superior connection with Mapp gas
should use Long radius 90s for refrigeration
Why so? Oil? How would that change the length of run because I believe a standard elbow counts as an extra 3 feet
Less friction is why.
Was good! 👍🏼
Awesome!
Don't you flux the pipe and joints like regular soldering?
Looks like overheating the copper?
Nice job, thank you.
Thanks for the video. I'm a pipefitter who is transitioning into a job that is still pipefitting but more refrigeration related. I was a little nervous about my brazing skills, but I liked the way you bent that sil fos. I'll probably watch it a few more times just to get a feel for where you are putting your heat when you are melting your rod
If you learned to braze from this I bet the guys you worked with laughed at you B4 showing how it's actually done🤣🤣🤣
Correct me if I'm wrong but he was absolutely using the flame at a few points to melt the brazing rod, right?
Y’all use brazing rings? I work on a navy vessel just started brazing
Thanks for sharing this video
You're very welcome & thank you for watching! I appreciate the feedback🙂 Stay safe out there & stay tuned for new videos!
Asking as a regular home owner; why for A/C lines do you use brazing rods instead of solder like used in plumbing for water?
The A\C system runs at far more higher pressure so all the joints on the system should have higher temperature resistance and stronger connection.
THANK YOU.
You're very welcome! Stay tuned for new videos every week🔧⚡️
I have a question every brazing kit I see uses oxygen with mapp , which is better acetylene only or using oxygen and MAPP, I have never braised plenty a soldering, but never braised
Yo I do hvac on sky scrapers and stuff and I haven't found a good video yet I really need to make one
Thanks, please do. Then invest in some grammar classes.
Good luck to you. Can I have a store link to buy a torch like the one you have? Thank you
Thank you! All my videos I leave a link for the products used in the description. I will send you a link below for the torch kit🙃 Thanks for watching & stay tuned for new videos every week!
TurboTorch Kit X-4B (A/C & Refrigeration kit)
amzn.to/3b1QZ2R
I like your technique dude! Real solid braze I need to practice mine!
Thank you so much! I really appreicate the feedback. Practice and you'll be just fine! Sending blessings your way from NYC. Thanks for watching & stay tuned for weekly uploads🙂
It is not nice.
good job
Thank you & thanks for watching! Stay safe out there & stay tuned for new videos every week🔧
@@JumpermanTech I will and very glad to follow
So no movement to facilitate capillary action? This looks nice on the surface but I would recommend travelling the heat down a little to form a much taller seal internally.
Michael Garcia I was thinking the same thing
Brazing seals the outside. If you get inside the lines u have a problem! It doesnt take much....
@@Progress24.7 wrong.
How you doing can you make a video where a copper tube is cracked millimetres from the compressor shell where its leaking oil and needs to be filled with the special welding rod...and what material to use..thnks
How do you remove the braze? just heat it up again?
Is soldering technically the same as brazing? I'm wondering when I would need to braze instead of solder.
Hi,
What brazing rods are they.
Thank you 2021
You're welcome 2021! Thanks for watching & stay tuned for new videos every week!
Do pros braze like this?
I guess that depends on what a pro is considered to be?
Great job 👏👍👌
Could I braze the vertical pipe first? then after that I rotate the pipe 90 degrees, and make the horizontal one to vertical, then braze it? because I think when braze the vertical one, the melt metal will go down into the gap between the pipes it will make the join much stronger. Thank you for sharing!
Get a professional please.
Good work keep it up love from india👍👍👍👍👍
Thank you very much! Hello to India! Stay tuned for new videos every week & stay safe out there✌
I’d like to see the joint cut open. I like the heat away from end and the joint filled or capped.
That hurt, didn’t pull the braze into the joint, kept moving the torch around way too much, no flowing around the joint just dabbing, get the heat correct first and stay at the correct distance, heat, melt, pull into joint with the heat, fill the joint.
Practice a few before posting lol
What is the advantage of brazing over soldering which is much simpler and less demanding?
Brazing is stronger and more heat and vibration resistant.