Brazing Copper To Steel Hvac

One of my friends owns a motel and asked me to replace the compressor in his pepsi machine for him.

Brazing copper to steel hvac.

Both oxygen free and oxygen bearing copper can be used for brazing work. For joining copper lines we usually use brazing rods that are made out of a copper phosphorous combination. Lap joints work best with an annealed copper brazed joint. We will be brazing or silver soldering refrigerant a c lines for hvac equipment.

I also give some tips on how to braze a copper fitting and ref. Hot tips for copper brazing. What is the proper solder brazing rod and flux to use when making this connection. The braze is what is melted by the torch to join two metals.

The percentage is the percentage of silver content in the rod. In this video i go over the oxy acetylene torch tips i use along with the gas pressures i use. The most common rods used for typical hvac brazing are 0 5 and 15 with several other levels mixed in there. Brazing rods look like straightened metal coat hangers and like solder they become stronger as the percentage of silver they contain increases.

I m a residential hvac guy. The most commonly used brazing filler metal types used to join copper tube and fittings fall into two distinct categories. My paperback and e book. The brazing temperatures for most of the brazing alloys used to joint copper piping systems bcup and bag alloys see below are roughly between 1 150 f 621 c and 1 550 f 843 c.

I hear standard 15 silverphos is not a good choice. Step by step tutorial on how to braze copper pipe like a pro. The clearance for allowing filler metal penetration in small to medium diameter pipes should not be more than 0 002 to 0 003 inches.