How To Weld Brass Fittings. Since the oxygen and acetylene are stored individually you have more control over the torchs flame. Spread soldering flux on the outside of the pipe and the inside of the brass fitting with a small brush.
Always wear an apron gloves and eye gear when working around hot metal. Prior to welding remove all components nuts ferrules and seals. Brass is an alloy in this case a mixture of copper and zinc.
The standard nut is also available in steel which often.
Forged Steel Pipe Fittings NPT - Class 6000. Put on gloves before starting any torches. Combine that with the fact that brass is very thermally conductive and requires quite a bit of heat input to weld and you have an arc that tries to vaporize the zinc. Gather your supplies including some clean metal scraps.