Oxyfuel Troubleshooting - marshall.k12.mn.us

Oxy Fuel Welding Troubleshooting 1 Copyright 2004 Lincoln Global Inc. Welding Flame Types Carburizing Flame Neutral Flame Oxidizing Flame 2 Copyright 2004 Lincoln Global Inc.

Weld Quality OK Torch High Torch Low Torch Slow Torch Fast

3 Copyright 2004 Lincoln Global Inc. Welding Troubleshooting TROUBLESHOOTING THE OFW PROCESS Trouble Welding Tip Popping Flames not clearly defined, smooth or even Regulator not holding constant pressure Leak around needle valve Difficult to light Probable Cause * Tip is operated at too

low heat value * Tip too large * Too close to work * Dirty tip * Defective regulator * Packing nut loose * Too much pressure Remedy * Increase pressures, and consult appropriate tip chart * Use next smaller size tip * Raise tip further from work * Clean with tip cleaner or replace tip

* Return unit for repair or replacement * Tighten packing nut * Consult appropriate tip chart 4 Copyright 2004 Lincoln Global Inc. Brazing Flame Types Carburizing Flame Neutral Flame Oxidizing Flame

5 Copyright 2004 Lincoln Global Inc. Soldering Flame Types Low Pressure Flame Medium Pressure Flame High Pressure Flame 6 Copyright 2004 Lincoln Global Inc. Cutting Flame Types Carburizing Flame

Neutral Flame Neutral Flame with Oxygen Cutting Stream Oxidizing Flame 7 Copyright 2004 Lincoln Global Inc. Cut Quality Good Cut Quality Poor Cut Quality 8 Copyright 2004 Lincoln Global Inc.

Dirty Tip Dirty Tip 9 Copyright 2004 Lincoln Global Inc. Speed Extremely Fast Slightly Too Fast Extremely Slow

Slightly Too Slow 10 Copyright 2004 Lincoln Global Inc. Tip Height Too High Too Low 11 Copyright 2004 Lincoln Global Inc. Other

Too Much Cutting Oxygen Too Hot Pre-Heat 12 Copyright 2004 Lincoln Global Inc. AWS Cut Quality Quality Cut Extremely Fast Irregular Pressure Extremely Slow

13 Copyright 2004 Lincoln Global Inc. Troubleshooting TROUBLESHOOTING THE OFC PROCESS Trouble Cutting Tip Popping Probable Cause * Too loose * Nicked seat Flames not clearly defined, smooth or even Regulator not holding constant pressure Leak around needle valve

Difficult to light * Dirty tip Flame change when cutting * Oxygen needle valve on torch handle partly closed * Oxygen cylinder almost empty * Defective regulator * Defective regulator * Packing nut loose * Too much pressure

Remedy * Tighten tip nut * Replace tip or repair seat in torch * Clean with tip cleaner or replace tip * Replace or repair regulator * Tighten packing nut * Consult appropriate tip chart * Open oxygen valve wide open * Replace cylinder with full one

* Replace regulator 14 Copyright 2004 Lincoln Global Inc.