Materials for welding leakage points of circulation chiller.
The pipes of circulation chiller are mostly made of copper, and commonly used types of solder include copper phosphorus solder, silver copper solder, copper zinc solder, etc. When welding, the selection of welding materials should be based on the material of the pipeline to ensure welding quality.
1. Brazing of copper to copper:
Phosphorus copper solder or copper phosphorus solder with low silver content can be selected. This solder is relatively cheap and has good molten liquid, and adopts filling and wetting processes.
2. Welding of steel to steel:
Brass strip solder and appropriate flux can be selected. During welding, the solder is heated to a certain temperature and inserted into the solder to melt and adhere to the solder. After welding, the remaining solder is brushed clean to prevent corrosion.
3. Welding of copper to steel or copper to aluminum:
Silver copper solder can be selected. When using the solder, it is best to dilute it with alcohol into a paste and apply it to the surface of the welding joint. During welding, the alcohol quickly evaporates to prevent water vapor from soaking in the refrigeration system.
4. Welding of copper and iron:
Phosphorus copper solder or brass strip solder can be selected, and a mixed flux of borax, boric acid, or boric acid can be used.