High Frequency Induction Welder is extensively used for welding of pipe and tube from 8mm to 300mm. The Induction Welder is designed for continuous operation to perform under most hostile environment. The Induction Welder consists of a Hartley type oscillator circuit, with grounded cathode design to reduce voltage stresses on oscillator components. High Frequency Induction Welder is provided with magnetic overload relay, grid bias disc capacitors and water cooled ceramic tank capacitor.