Usually when the draw rate is going to be a problem, switching over to propane or Natural gas is the answer...unless you have a very small tank it's not normally a concern
When you work on farm equipment, a standard tool is a GIANT rosebud. They draw a LOT of acetylene!
I have a big tank and I sometimes wish it was bigger!
Yea the big rosebuds can draw a lot, no doubt there! When you get real big propane is the way to go, More btu's, and the tips seem to not overheat as easily, at least In my experience
biggest setup I've used was 2-3" in diameter (it was quite a while ago now, I can't remember exactly) and we needed a liquid oxygen tank to feed it, propane of course, it was to straighten a "mag beam" that had been dropped as a result of a crane cable snapping...it looked like 40ft of spaghetti ...2 of us + consultant and 18 hours later it was straight (the two of us heated and the consultant directed)
Same place we had to bevel 3" plate with a radio graph, because of the bevel it was something like 8" or 10" of thickness, only tip we could find to do it was propane, and again a liquid oxygen tank
I got nuthin after that story of yours! You win!
Where did you exchange @6.5 Fan ?I get to drive to town today and exchange my mig tank for a new one. Welding feet on a new wind break yesterday, hmm run out just as things get tacked in place. I bought my tank several years ago, Air Liquide will only sell the smallest tank but i don't weld enough anymore to justify paying a yearly lease and have large tank.