Brass fittings are used in plumbing and pipes. Welding a brass fitting onto a pipe is simply another way of soldering. Generally, you heat the parts of the joint with a propane torch. The first step is to heat the brass fitting, which can cause the fitting to expand slightly. The following will introduce in detail how to weld brass fittings.
1. Clean the brass fitting planed to weld onto the pipe with a wire brush. Then clean the end of the pipe you'll meld the fitting to, also with steel wool or a steel brush.
2. Apply a thin coat of flux to the surfaces of both the pipe and the brass fitting,. Set the fitting onto the pipe and give the fitting a twist to be sure that the flux spreads evenly between the two.
3. Heat the base of the brass fitting with a propane torch. Move the torch in a circular motion to ensure that heat is applied evenly.
4. Stick the welding wire into the joint when the flux begins to bubble. If the brass fitting is hot enough, the solder will melt and flow into the joint.
5. Remove the torch from the brass fitting when the solder flows into the joint. Let the fitting cool before continuing. The solder should return to a solid state when the joint is properly cooled.
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