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Steel Pipe Welder
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Product: Views:458Steel Pipe Welder 
Unit price: Negotiable
Delivery date: Since the payment date Days delivery
Valid until: Long-term effective
Last updated: 2019-01-13 08:00




Application:steel pipe thickness 5-14mm

Brief Introduction of Solid State HF Welder

solid state H.F welder is specially designed for straight seam welding. It adopts high power components of US IR IRFP460 MOSFET and Germany IXYS Company DSEI60-06A rapid recovery diode. The high power capacitor C and inductor coil L compose current-mode parallel upper-voltage resonance circuit, which doesn’t need output transformer. Thus, it not only improves the efficiency, but also increases the reliability of the welder.

The solid state H.F welder has such distinct features as energy-saving, effective welding, simple structure, easy maintenance, low failure rate, low maintenance cost etc.


DC Power Unit includes rectify, flight wave and control parts.

Independent current & voltage display and control system — the welder is controllable even without central control unit.

Low Ripple Fiter — Reduces AC line harmonics and DC Ripple, ensure the weld quality.

SCR Power Supply — Provides constant output power for consistent weld quality.

Rectifier Circuit — 6 pulse Retification.

Simens PLC — easy to control and diagnose.


The inverter part is made up by parallel MOSFET power transistor modules, which is easy for maintainance.

Stable DC output — enhanced by 3-phase full-controllable thyristor rectifying bridge, flight wave reactor, filter capacitor, and filter reactor. 

Independent current & voltage display and control system — the welder is controllable even without central control unit.

Compact, sealed and internally water cooled cabinet.

Automatic load matching system —  enables  the welder to run at optimum efficiency with +/- 1% frequency stability.


Installed with LCD, power and speed adjust module, the pipe line can be completely controlled by the central control unit.

Dispay and alarm — the output current and voltage of the DC power unit; armature voltage and current, excitation voltage and current of the DC speed adjust unit. 


Composition:Plate heat exchanger, water tank, pump and electrical control part.

Closed loop circulation, outer water (normal) cools down the inner water (distilled water), no scaling.

Heat exchanger fins — High efficiency of heat radiation, low cost, applicable to large power H.F equipment.

Stainless steel water pump and copper pipe — less polution of the loop.

Stainless steel water tank with level switch — easy to check water level.


It is the input rectifier part of the equipment. It reduces the input voltage from 415V to 200V to ensure stable power supply, at the same time, to insulate the power grid.


· Indoor installation with good grounding condition. Grounding wire color should be obviously different from control wires. Sectional area of grounding wire :> 120mm², grounding resistance: ≤4Ω.

· Height above sea level should be no more than 4000m, otherwise rated value should be reduced to be operated.

· Air relative humidity: ≤85%.

· No severe vibration, no conductive dust, no various causticity gas and explosion gas.

· Installation gradient: ≤5°.

· Install in the place with good ventilation condition.

After Sale Service:

Our company has sufficient spare parts inventory and experienced technical after-sales personnel in China, able to respond quickly, and provide 7 x 24 hours full response service. Special commitment is made to provide free after-sales service within one-year warranty period and life-long paid service, and spare parts at the best price to ensure reliable and safe operation of the equipment during its service life.