I was using pure argon with MIG tonight on steel (yes, I know it has poor penatration). I had already welded for about an hour earlier, disconnected the regulator from the cylinder and put the cylinder cap back on. Came back later to finish the project, and screwed the regulator in, tightened with a crescent wrench. The regulator was not adjusted from 10 cuf/hr. Cracked the cylinder valve, and saw the flow rate rise on the gauge. Kept rising and rising. As soon as I realized this, I turned off the cylinder valve as fast as I could. The flow gauge continued rising, until the limit of the gauge. A few seconds later, and BANG. Nearly fell over. I'm not entirely sure what happened, but the flow gauge needle was stuck at about 50 cuf/hr afterwards, even with the low and high sides disconnected, tank gauge read zero. I believe the regulator failed, causing the hose to burst although I cannot see any hose damage. The regulator was Linde brand, the type included with the Lincoln electric flux cored to MIG conversion kit (solenoid, regulator, hose), cost about $100 for the kit. Any idea what caused the regulator to fail? Any idea what I should do next? Send it back to Lincoln? Linde? Thanks.
- posted
18 years ago