Posted by forty40 on April 20, 2013 at 18:58:47 from (74.77.12.246):
In Reply to: Rosebud torch posted by Leroy on April 20, 2013 at 16:49:05:
Quoting Removed, click Modern View to see
A #6 tip size designation is not usually a rosebud multi-flame heating head, but a single flame welding tip for oxy/acetylene gas welding or brazing rated by the mfg's recommended metal thickness range. A rosebud is rated in BTU output and it is very important to consult the mfg's operating instructions for the size of rosebud being used. For acetylene, if the torch draws more gas than can be vaporized by the tank, it will draw acetone which can ruin a regulator and the gas hose. Large acetylene or Mapp rosebuds may require manifolding two fuel gas cylinders together. The size of hose is also important, I'd hate to guess how many Mapp or natural gas rosebuds I've seen blown up by welders or other people in the shop when connected up to a too small regulator or hoses or maintenance had reduced the pipe size to the regulator. Too low of a flow will cause the torch to overheat, melting the flame slots which closes them off and the torch will begin to bang like a machine gun, blowing molten brass out the end. This can get dangerous because large tips need velocity to remain cool enough not to melt the head itself. The other problem I've seen on more than one occasion is a natural gas, recessed face rosebud, hooked up to a Mapp tank. Mapp gas has much more BTU/volume, quickly overheating the natural gas rosebud, again with the same "machine gun" melting brass flying results.
Always match the tip size and type with the manufactures instructions. I just bought a new Smith rosebud for the race car shop and even the individual torch head came with the instruction book with tables of information showing which tip goes with which size torch handle.
If the #6 tip is a one hole, single flame, welding tip, it isn't going to be a problem using it on medium duty regulators. I hate to talk down to people, but after all these years in fabrication, I can't believe some of the things experienced welders do and then wonder what happened.
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