08-17-2016, 07:01 PM
(08-17-2016, 10:19 AM)Highpower Wrote: 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.
thanx highpower I had a look at the compressor propane setup here a while ago and came to the opinion that there would be to many contaminants in the air from the tank .that being said itd still be a great idea so I can braze /silver solder ect .I have watched toms video on joining blades a few times an got some silver solder from a mate round the cnr .the blades for my saw [similar to hf 4x7 ]are 35 dollars here .seems Australia is the dearest place to be if you want good tools and toys ive seen the same/similar bandsaw over the pond for under 200 mine was just under 700 with a mates rate
ive got some brazeing to do on a old WLA frame [they brazed them back then] an will try the air propane setup
in the welding stores ect here al they sell is the tips for propane / oxybottle seems everyone else must be richer than me lol