1. During the welding process, always keep the flame covering the joints to prevent air from entering;
2. The flux will be soldered dry, the water will evaporate at 100°C, and the flux will become milky white;
3. The flux will foam at 316°C;
4. The flux becomes paste at 427°C;
5. The flux becomes fluid at 593°C, which is close to the brazing temperature;
6. Solder containing 35%-40% silver melts at 604°C and flows at 618°C;
7. Note that the two workpieces to be welded must be heated with a welding torch;
8. Whether the temperature is suitable can be observed by the color of the flame. When the temperature reaches the brazing temperature, the flame will appear green, and the green flame will indicate that the temperature is suitable when it reaches the silver welding temperature;
9. To weld the
copper pipe and the steel pipe to each other, the copper pipe must be heated first (because the copper pipe heats quickly and requires more heat);
10. During the brazing process, the welding torch should not always stop at one point, but can be moved in a figure-eight shape;
