No one ever talks about using nitrogen when unsweating a fitting . I’m assuming it’s just as important installing a new line . Great class again . Love the animation . Hands down the best teaching tool .
Hi Brian, I learned copper brazing as an apprentice union plumber about 40 years ago. We had a lot of hospital work requiring medical gas piping which all had to be state certified for purity and lack of cross connections. In school where we tested for our personal Med Gas License we tested by cutting out our test joints and quartering them as you show but also had to prove 100% braze penetration at all points of the test coupon or would fail and no state license. To do this you use the vise anvil to 1st flatten all 4 of the 1/4 coupon pieces and then keep pounding it to a point where the 2 pieces of the 1/4 coupon would fall apart and then the test proctor would check it for ANY voids of filler metal which will show up quite easily using this test process. You see, any gaps or voids in a med gas joint are considered breeding grounds for bacteria/virus which could be deadly in hospitals we were taught. Just get it cherry red before touching a stick of Stay-Silv 15 to it and letting capillary action do it's thing. We always used Pure Dry Nitrogen to purge the O2 out and then a 3 to 5 bubble flow after the purge while brazing and cool down for at least 5 minutes Love all your videos, Bob R.
On my end the key thing is I need to be allowed to do it. I need to be allowed to have a spare tank of nitrogen on my vehicle at all times. If I don't have spare nitrogen, eventually I simply won't have nitrogen. Also I will need to be given adequate time for the job. At the end of the day I just need to make rent, if you want it done fast, with minimal resources... Well it is your company and your rules. I Will do what you require at least until I find a better job.
@@vidard9863the reason I started my own business is because the company I was working for the past 15 years asked me to start doing two systems a day like they required other leads to do. While continuing my same responsibilities of training all the new employees and going behind and fixing all the issues left by the guys having to do two installs a day.
I hope you realize the profound effects you are making on our entire industry. Your videos are the most helpful and applicable information I’ve ever come across. Please keep pushing and continuing to do what you are doing.
Brian, we appreciate all of the great and informative videos that you post. But please work on the volume. I like to listen to your stuff while I'm driving to and from jobs, and I constantly struggle to hear your videos despite the volume being maxed out.
Company i used to work for we ended up doing so many TXV's because the lead installer would braze without nitrogen. I explained to them your putting so much oxidation inside the piping and system. He didnt care and said it didnt affect it. Well proof was in the pudding after replacing txv's that were plugged up due to poor installation practices
@TheKageshimura yup heard that a million times. " Manufacturers aren't making good products anymore. So txvs going bad". Total nonsense. I don't work for that company anymore. So I no longer have to worry about following behind doing warranty work
A good filter drier should remove a lot before going into the TXV .Nitrogen is good til it’s flowing out from the fittings and not letting you braze the fitting correctly .
@garza7676 I have been brazing for a long time now. Not flowing nitrogen has causes nothing but problems. Filter drier will not stop all the oxidation that comes with not using nitrogen. I've seen it many many times over now. I always flow nitrogen with brazing.
Exactly what is going to fail on my residential American Standard 5 ton air conditioning unit now that I caught the young kid doing the brand new install with new lines not using nitrogen. I went downstairs in the basement where he was brazing, and asked him if was using N. He lied and said yes. I went outside and took a picture of his N tank sitting there not connected to the lines, and my systems high and low lines open to atmosphere on the outside of the house. I called his boss, his boss called him, and he lied to his boss, until his boss made him walk upstairs and outside and describe what he sees in regards to his N tank. Then he tried to cover it up saying "it's only for your warranty, it doesn't actually hurt anything". And then the owner called me and said he never uses N and not to worry about it, that the newly installed in line filter/dryer will filter out all the carbon anyways. I feel like the whole company is a bunch of liars so I don't know what to believe at this point. Seems like equipment here in the midwest only lasts 10 years anyways, and then starts leaking or failing one component at a time, A-coil, compressor, txv valve, capacitor, relay, leaking schrader valves, fried bell end of a fancy pants dc computer controlled fan motor, you name it. It's been working for 4 years, but have a feeling I'll be replacing it 6 years from now.
Ideally you do flow nitrogen. But I’ll say I’ve been brazing with no nitrogen for 40 years. I still have units running from the 80s. I wouldn’t say it’s end all be all.
410a doesn’t use the same Oil as r22. Saying you’ve been doing it so long without issues has already been explained. The synthetic oil strips the oxides of fast compared to mineral oil. Old practice aren’t good.
Filter drier wouldn't catch those black sooth from braze without N. I did a coupe service call with filter drier not clogged up but head pressure is too high just to find a clogged up metering device with black sooth. Imagine it getting stucked on compressor valves.
the ONLY way to verify that you do not have any oxygen in the pipe is with an oxygen analyzer. but I also recognize that nobody is going the extra mile on a refrigeration circuit, and I believe that code only requires one for MED gas systems
I get that Oxy acetylene is what they prefer using but they don’t use straight acetylene turbo torch? I’ve never used oxy acetylene and it seems interesting to me
Turbo torches don't always get hot enough for certain applications. With smaller residential stuff it's awesome (because it's so much lighter), but with commercial piping at 1 inch or higher, it can take way too long to get enough heat through the workpiece.
As usual, good stuff!
No one ever talks about using nitrogen when unsweating a fitting . I’m assuming it’s just as important installing a new line . Great class again . Love the animation . Hands down the best teaching tool .
Hi Brian, I learned copper brazing as an apprentice union plumber about 40 years ago. We had a lot of hospital work requiring medical gas piping which all had to be state certified for purity and lack of cross connections. In school where we tested for our personal Med Gas License we tested by cutting out our test joints and quartering them as you show but also had to prove 100% braze penetration at all points of the test coupon or would fail and no state license. To do this you use the vise anvil to 1st flatten all 4 of the 1/4 coupon pieces and then keep pounding it to a point where the 2 pieces of the 1/4 coupon would fall apart and then the test proctor would check it for ANY voids of filler metal which will show up quite easily using this test process. You see, any gaps or voids in a med gas joint are considered breeding grounds for bacteria/virus which could be deadly in hospitals we were taught. Just get it cherry red before touching a stick of Stay-Silv 15 to it and letting capillary action do it's thing. We always used Pure Dry Nitrogen to purge the O2 out and then a 3 to 5 bubble
flow after the purge while brazing and cool down for at least 5 minutes
Love all your videos, Bob R.
Nathan was great throughout this video. More of him pls
You all do a great job. Thank You very much!!!
I need a class on how to actually get my guys to follow these practices...
It's called leadership my guy.
Stop hiring coke heads and drop-outs.
On my end the key thing is I need to be allowed to do it.
I need to be allowed to have a spare tank of nitrogen on my vehicle at all times. If I don't have spare nitrogen, eventually I simply won't have nitrogen.
Also I will need to be given adequate time for the job.
At the end of the day I just need to make rent, if you want it done fast, with minimal resources... Well it is your company and your rules. I Will do what you require at least until I find a better job.
@@vidard9863the reason I started my own business is because the company I was working for the past 15 years asked me to start doing two systems a day like they required other leads to do. While continuing my same responsibilities of training all the new employees and going behind and fixing all the issues left by the guys having to do two installs a day.
@@otm646I bet you thought that was clever, and clearly don't live in the real world.
I hope you realize the profound effects you are making on our entire industry. Your videos are the most helpful and applicable information I’ve ever come across. Please keep pushing and continuing to do what you are doing.
Great video! Very informative!
Thanks again!!👍👍👍
Brian, we appreciate all of the great and informative videos that you post. But please work on the volume. I like to listen to your stuff while I'm driving to and from jobs, and I constantly struggle to hear your videos despite the volume being maxed out.
Good video and great comments.
Dziękuję , dobra, mądra lekcja👍
Brians smirk while talking about tip selection at 21:25 😆
Do you guys ever just use acetylene tanks alone a turbo torch ?
Company i used to work for we ended up doing so many TXV's because the lead installer would braze without nitrogen. I explained to them your putting so much oxidation inside the piping and system. He didnt care and said it didnt affect it. Well proof was in the pudding after replacing txv's that were plugged up due to poor installation practices
Same issue but my boss is the problem. Won’t let us flow and
Blames the manufacturer for TXV failure even though it’s happening a lot with his jobs.
@TheKageshimura yup heard that a million times. " Manufacturers aren't making good products anymore. So txvs going bad". Total nonsense. I don't work for that company anymore. So I no longer have to worry about following behind doing warranty work
A good filter drier should remove a lot before going into the TXV .Nitrogen is good til it’s flowing out from the fittings and not letting you braze the fitting correctly .
@garza7676 I have been brazing for a long time now. Not flowing nitrogen has causes nothing but problems. Filter drier will not stop all the oxidation that comes with not using nitrogen. I've seen it many many times over now. I always flow nitrogen with brazing.
@@pineychristian Do you run nitrogen when when unsweating lines ?
Exactly what is going to fail on my residential American Standard 5 ton air conditioning unit now that I caught the young kid doing the brand new install with new lines not using nitrogen. I went downstairs in the basement where he was brazing, and asked him if was using N. He lied and said yes. I went outside and took a picture of his N tank sitting there not connected to the lines, and my systems high and low lines open to atmosphere on the outside of the house. I called his boss, his boss called him, and he lied to his boss, until his boss made him walk upstairs and outside and describe what he sees in regards to his N tank. Then he tried to cover it up saying "it's only for your warranty, it doesn't actually hurt anything". And then the owner called me and said he never uses N and not to worry about it, that the newly installed in line filter/dryer will filter out all the carbon anyways. I feel like the whole company is a bunch of liars so I don't know what to believe at this point. Seems like equipment here in the midwest only lasts 10 years anyways, and then starts leaking or failing one component at a time, A-coil, compressor, txv valve, capacitor, relay, leaking schrader valves, fried bell end of a fancy pants dc computer controlled fan motor, you name it. It's been working for 4 years, but have a feeling I'll be replacing it 6 years from now.
Ideally you do flow nitrogen. But I’ll say I’ve been brazing with no nitrogen for 40 years. I still have units running from the 80s. I wouldn’t say it’s end all be all.
410a doesn’t use the same
Oil as r22. Saying you’ve been doing it so long without issues has already been explained. The synthetic oil strips the oxides of fast compared to mineral oil. Old practice aren’t good.
@@TheKageshimura okay we’ll what’s your point because I also have 20+ year old 410A systems running
Filter drier wouldn't catch those black sooth from braze without N. I did a coupe service call with filter drier not clogged up but head pressure is too high just to find a clogged up metering device with black sooth. Imagine it getting stucked on compressor valves.
Thank you for app. Have you any Turbocor case on your trainings?
Thanks, go ahead! 😀
How about a nitrogen purge video filmed on site, on an actual job. Please and thank you
the ONLY way to verify that you do not have any oxygen in the pipe is with an oxygen analyzer. but I also recognize that nobody is going the extra mile on a refrigeration circuit, and I believe that code only requires one for MED gas systems
I get that Oxy acetylene is what they prefer using but they don’t use straight acetylene turbo torch? I’ve never used oxy acetylene and it seems interesting to me
Turbo torches don't always get hot enough for certain applications. With smaller residential stuff it's awesome (because it's so much lighter), but with commercial piping at 1 inch or higher, it can take way too long to get enough heat through the workpiece.
@donjohnson5172 this is true I've seen it myself doing bigger than 1 3/8
12:03 - Gnat's funny, too!
Primary takeaway:
Have some pride and be inclined to do the work correctly.
can we use co2 instead of nitrogen ?
No the O2 in the CO2 will oxidize and cause a problem.
Is argon an inert gas
Yes
Yes