PROCEDURES FOR BRAZING
PIPE AND TUBING

Select Brazing Alloy. Refer to the chart 11 on pg.26-27 for recommended brazing Filler Metal selection. When brazing copper to copper, alloys such as Dynaflow®, Stay-Silv® 5, or Stay-Silv® 15 are recommended. These alloys contain phosphorus and are self- fluxing on copper. When brazing brass or bronze fittings, Stay-Silv® white flux is required with these alloys. When brazing iron, steel or other ferrous metals, select one of the Stay-Silv® brazing alloys such as Safety-Silv® 45 or Safety-Silv® 56 with Stay-Silv® white brazing flux. Do not use phosphorus bearing alloys as the joint may be brittle. To estimate the amount of brazing alloys needed, see Chart 1 on page 12.

Proper Fluxing is important because the flux absorbs oxides formed during heating and promotes the flow of filler metal. When using Stay-Silv® white flux, apply it only with a brush. To prevent excess flux residue inside refrigeration lines, apply a thin layer of flux to only the male tubing. Insert the tube into the fitting and, if possible, revolve the fitting once or twice on the tube to ensure uniform coverage.

Assemble tube and fittings. Insert the fluxed tube end into the fitting. Maintain support to ensure the proper alignment until the brazing alloy solidifies. After brazing maintain support for a few seconds (or more) depending upon the size of the joint area. The assembly is now ready to braze, using brazing alloy in rod, wire, or in coil form manually fed into the joint.