08-17-2016, 10:19 AM
I guess it depends on your definition of "welding". There are several different torch sets made to use different fuels in combination with "air". Not to be confused with (pure) Oxygen. The Fuel/Air combinations are generally used for brazing/soldering work because of their reduced flame temperatures, compared to Fuel/Oxygen torches.
I have a full size set of Oxygen/Acetylene torches for "welding" & cutting, but I also have an Acetylene/Air torch rig that is much more portable for brazing/soldering work. There may be exceptions but every radiator or condenser/evaporator coil I have ever seen was assembled with a soldering or brazing operation. I've never seen one myself that was welded together. Most A/C or refrigeration line sets are brazed together with a 15% silver/copper/phosphorous filler rod. (1190° - 1475° F)
Just about every plumber or HVAC tech I know of carries either a very small portable Oxy/Acetylene rig or a Fuel/Air torch set on the truck. Or both.
I have a full size set of Oxygen/Acetylene torches for "welding" & cutting, but I also have an Acetylene/Air torch rig that is much more portable for brazing/soldering work. There may be exceptions but every radiator or condenser/evaporator coil I have ever seen was assembled with a soldering or brazing operation. I've never seen one myself that was welded together. Most A/C or refrigeration line sets are brazed together with a 15% silver/copper/phosphorous filler rod. (1190° - 1475° F)
Just about every plumber or HVAC tech I know of carries either a very small portable Oxy/Acetylene rig or a Fuel/Air torch set on the truck. Or both.
Willie