Ray Cagganello

Contributing Writer

Forge welding process diagram

Electric resistance welding at a glance

June 13, 2002

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This article provides an overview of electric resistance welding (ERW). It dicusses high-frequency ERW (contact and induction) and rotary wheel contact welding (AC, DC, and square wave). It describes the differences among the processes, as well as the power supplies and weld rolls.

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Staying safe during HF welding: A common sense approach to personnel protection

October 11, 2001


Proper clothing, training, procedures, troubleshooting, preparation, and equipment for HF welding are critical if you want to prevent workplace accidents.

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Vee length

Maintaining and troubleshooting HF welders: A common-sense approach for vacuum tube and solid-state machines

February 19, 2001


The basic steps of general preventive maintenance and troubleshooting for both vacuum tube and solid-state high frequency (HF) welders should assist in keeping welders online and producing pipe or tube.

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