First of all, the surface of the high-precision brass tube will form a hard protective layer, no matter whether it is grease, carbohydrates, bacteria and germs, harmful liquids, oxygen or ultraviolet rays, it cannot pass through it, nor can it be eroded to pollute water quality, and parasites cannot pass through it. It cannot inhabit the surface of copper pipes to soften them. High-precision brass tubes are harder than plastic tubes, more flexible than ordinary metals, easy to process, and have certain frost-heave resistance. The high-precision brass tube has high pressure resistance, which ensures that it can maintain excellent performance even under high pressure without deformation or cracking.
The brass welding method is generally gas welding, brass welding wire, borax. Pay attention to the size of the flame when welding. First use gas welding to burn the copper pipe red. At this time, pay attention to the blue flame in the middle when adjusting the flame, and adjust it to a longer length, otherwise the temperature will be high if it is short. Add borax, and add brass welding wire after borax is melted.
Steps of Brass Soldering
1. During the welding process, always keep the flame covering the joints to prevent air from entering;
2. The flux will be dried, and the moisture will evaporate at 100°C, and the flux will become milky white.
3. Flux will foam at 316°C.
4. 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 product to be welded must be heated with a welding torch.
8. You can observe whether the temperature is suitable 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 a lot of heat).
10. During the brazing process, the welding torch should not stop at one point all the time, but can be moved in a figure-eight shape.
11. It is recommended to use a large torch, so that a large amount of heat can be obtained with a soft flame without excessive pressure or “blowing”, preferably with a slight afterglow on the inner conical flame.
Post time: May-12-2023