American Welding Society Charlotte Weisman, W. H. Kearns ... SHIELDING GAS A good practice is always to purge the gas system of air a few minutes before starting to weld after a period ... Troubleshooting guide for gas tungsten arc welding.
|Title||:||Welding Handbook: Welding processes: arc and gas welding and cutting, brazing and soldering|
|Author||:||American Welding Society|
|Publisher||:||Amer Welding Society - 1978|