What brazing rods are used for copper gas lines?

1. BCuP-5: This is a copper-phosphorus alloy with 5% phosphorus content. It is the most widely used brazing rod for copper gas lines as it provides excellent joint strength and corrosion resistance. It has a melting point of approximately 1,180°F.
   
   

2. BCuP-3: This is also a copper-phosphorus alloy but with a lower phosphorus content of 3%. It is typically used for capillary brazing, where very precise and consistent joints are required. Its melting point is around 1,235°F, slightly higher than BCuP-5.
   
   

3. AgCuP/BCuAg: These are silver-copper-phosphorus or copper-silver alloys containing varying amounts of silver, copper, and phosphorus. They offer high strength and ductility, making them suitable for gas lines carrying higher pressure. These alloys have melting points ranging from 1,115°F to 1,436°F, depending on the specific composition.
   
   

When selecting a brazing rod for copper gas lines, the specific gas being transported, the operating pressure, and the brazing process used should be considered. Always adhere to the manufacturer's recommendations and applicable regulations regarding the selection and application of brazing rods for gas lines.