Brazing practice

[Larry2]

It's been years since I brazed copper tube. I got out some stay-silv 56 and white paste flux to practice on a scrap piece. The silver-56 filler flowed all the way through the joint and can be found around the perimeter of the pipe in the joint.. The inside of the fitting is stained and has a bit of flux marking. Next try will with with a lot less flux and some inert gas slowing through, to protect the inside from oxidizing. I'd be interested to hear recommendations on brazing methods. I have an oxy/acet setup with various tips, 0, 1, 2 for instance. I had it set for sightly more fuel than would produce a neutral flame.

Are the copper clad fittings on a compressor very fussy about flux and temperature? I read they can burn off the copper clad and then you have a mess. I guess being hooked to the pot, they can take a bit of heat.

I Have silv45 and silv56 available. Stay-Brite too, but we won't talk about that.... these connections have high pressure and vibration.