print this page
AAA

Tube, Pipe & Fittings

Loading

Soldered Joints:
Applying Flux

Use a flux that will dissolve and remove traces of oxide from the cleaned surfaces to be joined, protect the cleaned surfaces from reoxidation during heating, and promote wetting of the surfaces by the solder metal, as recommended in the general requirements of ASTM B 813. Apply a thin even coating of flux with a brush to both tube and fitting as soon as possible after cleaning (Figures 18 and 19).

Figure 18. Fluxing: Tube
Figure 19. Fluxing: Fitting
 

WARNING: Do not apply with fingers. Chemicals in the flux can be harmful if carried to the eyes, mouth or open cuts.

Use care in applying flux. Careless workmanship can cause problems long after the system has been installed. If excessive amounts of flux are used, the flux residue can cause corrosion. In extreme cases, such flux corrosion could perforate the wall of the tube, fitting or both.

Copper Tube Handbook

Available in 3 formats:

Web Version
and
PDF Version
and
Desktop Application