How To Braze Copper Pipe




What do you think about this video?

Lawrence Mcconnell: Where is the nitrogen purge? How about heating the inner tube first?

71dembones: Hey Gregc! Thanks for the info! I am aware of of the properties of sil-phos rod as such material is one of my everyday consumables. "Wrong" comment? The video IS about sil-phos brazing copper pipe! However, if you are silver soldering copper to copper (ie stay brite 8 for refrigeration components- TXV, solenoid valve, etc) a white brazing flux is used. We would use 56% silver braze for steel to copper connections (ie hot gas and liquid line connections on condenser water barrels) also with flux

practicalman45: What is the name of the filler material rod? Is that stuff called Sil-Phos?

TheSuperchuck83: So I'm learning this for work. I know they're gonna train me but I'm wanting to not look like a complete idiot. . .any tips for a total newbie?

jetstream123: Clean joint not all gobbed up. Nice job

James Toll: Terrible ...obviously not union!!! Hahaha my 8 year old son could do better.

71dembones: with brazing, you only use flux when joining dissimilar metals (steel to copper etc)

Casey Thornbury: I use brazing instead of solder for refrigeration...... cheap is not good..... cheap is cheap

matt mayo: yes you can!

gregc2222: Another issue I have, is that you say above that you use Harris stay bright 8 with a white brazing flux? Are you sure? Stay Brite #8 is a Tin "silver bearing" soft (plumbing) solder with a liquidus a bit over 500F. White borax brazing fluxes aren't effective until you're well over 1000F. OTOH, white borax flux *is* the right thing to use with a high silver content "hard solder" or silver braze like the 56% you mentioned, or anything in the Bag-N series of alloys.

Gary Ino: WTH? No flux ? Way too much heat bro ....

hiEnuff: Focus the heat on the fitting then let the heat pull the filler into the joint

Charles Remensnyder: That was nice brazing I thought the flame size was a little over kill but you surely knew how to use it. Great finishing looking!:)

gregc2222: I was replying to your comment of "You only use flux when joining dissimilar metals" and that's wrong. You're implying that no flux is needed to join similar metals, and that's wrong. Try doing SS to SS, or brass to brass, or Al to Al, or Ni to Ni without flux and see how far you get. The *only* instance where it *seems* you can get away with not using a flux is copper to copper using a phosphorus rod. And in that situation, the P serves the purpose of a flux. So flux is always used in brazing.

Clown Whisper: Oh and what gas did you use

gregc2222: Yeah, he used too much rod, but I liked the fact of the higher heat input. It got the brazing rod fully liquid which allowed it to be fully drawn into the joint. Too often I see filler metal just blobbed up around the edge of the fitting, and not enough down inside the joint itself.

jamar winston: Gd job you jus got the pipi ruby red hot i see ..it seems to me it almost like sauder

Clown Whisper: Could you do that with copper wire or copper rod?

BrandiBenny: Acetylene?

Patrick Menser: Bad job..too much heat. You got the braze all over the outside of the fitting. You put enough braze on that joint for 3....lol

71dembones: OK You obviously know more than me; I guess I'll just go back to work brazing and such:)

71dembones: Obviously not union! LOL I've seen some things that obviously ARE union, too my friend!!! :)

WeBeJamminToo1: Crispy2870, you're right on the money! Why would you waste your money and time doing this? Solder it dude, solder is cheap!

gregc2222: Yes, you should sand the pipe down for brazing, not just soldering. But too many techs think you can do without. The end result is a joint where the braze filler metal is only on the outside. A properly brazed joint should draw the filler metal down inside by capillary action. And dirty pipe is not going to do that properly. Regardless of whether you're brazing or soldering(and soldering is actually just a lo-temp form of brazing.)

practicalman45: Can I just use my oxy-acetylene torches for this? And should the flame be carburizing, neutral, or reducing?

ruellersss: You don't need to sand the copper down for brazing that's only for soldering and when you braze you never want to have the copper so close to the vice,if you do the heat from the torch goes straight to the vice not the copper so it will take longer for the copper to heat up and you don't get a even draw into the joint, and you use way to much braze

Chris Carr: this video was made for a joke right ?

gregc2222: Wrong, you need flux for any kind of brazed joint. The only apparent exception is when copper is joined to copper, it can be done with a filler metal that contains phosphorus. Any BCuP series material. But the phosphorus itself performs the fluxing action. On the other hand, any other kind of brazing rod, even one with a high silver content, will require a separate flux if the rod contains no phosphorus.

Rating:
How To Braze Copper Pipe 3.9 out of 5

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How To Braze Copper Pipe