This is very annoying more than anything, but I want to make sure I am not damaging anything. First place to check is your pressures. This may be where you are getting into trouble. Finish by increasing the oxygen to a neutral flame and you should have no popping. It’s something that’s always been in the back of the garage gathering dust. Turns out I had some solder (I was doing plumbing) that fell into the torch when I aimed it … Lighting, adjusting and shutting down an oxygen-acetylene torch is easy – especially when following the proper procedures. Set torch for a neutral flame. I've got the acetylene set at 5-7lbs and the oxygen at 40lbs. Backfire and Flashback: A backfire is characterized by a loud snap or pop as the flame goes out, and is caused by a momentary burning back of the flame into the torch tip. 5’ tall tanks, heavy duty stand, cutting torch and smaller welding/braising torch. Set flame just high enough to eliminate the carbon. If the flame is moving faster than the gasses, it goes back into the torch and bang. If you use more than enough acetylene, that’s a variant of your “fuel first” method. If anything is blocking that the torch will just go out and behave oddly. A backfire is less serious. I can get the flame going when I turn the acetylene on, but it immediately pops and goes out when I turn the O2 on. In addition to these easy to follow instructions, you must always be sure to follow the torch manufacturer's operating procedures. Most torch problems and complaints come from the torch tip and from the O-rings that seal the nuts. The problem started when I tried to use a rosebud torch for the first time. Using my oxy/acetylene torch, with the heating tip ( rose bud ), I cant seem to get it to right, as soon as I turn on the oxygen and start to adjust the flame it pops and goes out and if I can get it to a neutral flame it only last a short time and pops and goes out. Too much oxygen, and it won’t light, or will try to light but just “pops” and goes out again. I am using a #2 Cutting tip on the Cutting torch. Whenever I try to fine tune the tip to begin a cut, the torch begins to pop. I’ve had a Smith Little torch for 10+ years, and suddenly, I can’t get it lit, or the flame tip is tiny. Over time, the ports inside the tip will develop blockage from metal particles and other debris and the O-rings will wear out. The purpose of a cutting torch is to cut through various sizes of metals. I have my Gas regulator set between 11-14 psi and the Oxygen Regulator between 30-35 psi. Too close and the tip will overheat and pop out. If I add just a light pressure on the lever with my thumb I can get the popping to stop. When extinguishing the torch, close the acetylene valve first and then close the oxygen valve. First - before you attempt to light the torch … The gasses are moving out of the torch at another rate. SLOWLY open the oxygen. If you look down in there (with the torch off) you will see a 3-pointed star where the gas come out. Several years ago, I inherited a professional Oxy-Acetylene setup. For a cutting tip, the acetylene is still set at 10psi, but the oxygen will be set much higher, depending on the tip used. Turn on acetylene slightly (til you hear flow) and light torch. The closer I get to having the cones nice and sharp, the faster the pops become until it finally blows the torch out. When you are about half way to a neutral flame with oxygen, go back to the acetylene valve and open it about half of the amount you needed to back it off to get the flame to come back to the tip. In short, do it wrong, and it basically just won’t light, or won’t light as easily. When I am cutting with the torch about every 3-5 seconds there is a low pop. 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